- Reference
Definition
- Namespace:
- System.Web.UI.WebControls
- Assembly:
- System.Web.dll
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Checks whether the value of an input control is within a specified range of values.
public ref class RangeValidator : System::Web::UI::WebControls::BaseCompareValidatorpublic class RangeValidator : System.Web.UI.WebControls.BaseCompareValidatortype RangeValidator = class inherit BaseCompareValidatorPublic Class RangeValidatorInherits BaseCompareValidator- Inheritance
Examples
The following example demonstrates how to create a RangeValidator control on the Web page to determine whether the value entered into an input control is within the comparison range.
Important
This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.
<%@ Page Language="C#" AutoEventWireup="True" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head> <title>RangeValidator Example</title><script runat="server"> void ButtonClick(Object sender, EventArgs e) { if (Page.IsValid) { Label1.Text="Page is valid."; } else { Label1.Text="Page is not valid!!"; } } </script></head><body> <form id="form1" runat="server"> <h3>RangeValidator Example</h3> Enter a number from 1 to 10: <br /> <asp:TextBox id="TextBox1" runat="server"/> <br /> <asp:RangeValidator id="Range1" ControlToValidate="TextBox1" MinimumValue="1" MaximumValue="10" Type="Integer" EnableClientScript="false" Text="The value must be from 1 to 10!" runat="server"/> <br /><br /> <asp:Label id="Label1" runat="server"/> <br /><br /> <asp:Button id="Button1" Text="Submit" OnClick="ButtonClick" runat="server"/> </form></body></html><%@ Page Language="VB" AutoEventWireup="True" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head> <title>RangeValidator Example</title><script runat="server"> Sub ButtonClick(sender As Object, e As EventArgs) If Page.IsValid Then Label1.Text="Page is valid." Else Label1.Text="Page is not valid!!" End If End Sub </script></head><body> <form id="form1" runat="server"> <h3>RangeValidator Example</h3> Enter a number from 1 to 10: <br /> <asp:TextBox id="TextBox1" runat="server"/> <br /> <asp:RangeValidator id="Range1" ControlToValidate="TextBox1" MinimumValue="1" MaximumValue="10" Type="Integer" EnableClientScript="false" Text="The value must be from 1 to 10!" runat="server"/> <br /><br /> <asp:Label id="Label1" runat="server"/> <br /><br /> <asp:Button id="Button1" Text="Submit" OnClick="ButtonClick" runat="server"/> </form></body></html>Remarks
The RangeValidator control tests whether the value of an input control is within a specified range.
The RangeValidator control uses four key properties to perform its validation. The ControlToValidate property contains the input control to validate. The MinimumValue and MaximumValue properties specify the minimum and maximum values of the valid range.
The BaseCompareValidator.Type property is used to specify the data type of the values to compare. The values to compare are converted to this data type before the validation operation is performed.
Note
When the Type property is set to Date and the current calendar type is non-Gregorian, the validator performs server-side validation only. The validator client script supports only Gregorian calendars.
The following table lists the different data types that can be compared.
| Data Type | Description |
|---|---|
String | A string data type. |
Integer | A 32-bit signed integer data type. |
Double | A double-precision floating point number data type. |
Date | A date data type. |
Currency | A decimal data type that can contain currency symbols. |
Note
Validation succeeds if the input control is empty. Use a RequiredFieldValidator control to make the input control a mandatory field.
Note
The RangeValidator control throws an exception if the value specified by the MaximumValue or MinimumValue property cannot be converted to the specified BaseCompareValidator.Type.
Note
When you use the RangeValidator control inside an UpdatePanel control, make sure that the validator control and the control it is associated with are in the same panel. For more information about using the UpdatePanel control for partial-page updates, see Partial-Page Rendering Overview.
For additional information on validation controls, see BaseValidator.
Accessibility
For information about how to configure this control so that it generates markup that conforms to accessibility standards, see Accessibility in Visual Studio and ASP.NET and ASP.NET Controls and Accessibility.
Constructors
| RangeValidator() | Initializes a new instance of the RangeValidator class. |
Properties
| AccessKey | Gets or sets the access key that allows you to quickly navigate to the Web server control. (Inherited from WebControl) |
| Adapter | Gets the browser-specific adapter for the control. (Inherited from Control) |
| AppRelativeTemplateSourceDirectory | Gets or sets the application-relative virtual directory of the Page or UserControl object that contains this control. (Inherited from Control) |
| AssociatedControlID | This property is not supported. (Inherited from BaseValidator) |
| Attributes | Gets the collection of arbitrary attributes (for rendering only) that do not correspond to properties on the control. (Inherited from WebControl) |
| BackColor | Gets or sets the background color of the Web server control. (Inherited from WebControl) |
| BindingContainer | Gets the control that contains this control's data binding. (Inherited from Control) |
| BorderColor | Gets or sets the border color of the Web control. (Inherited from WebControl) |
| BorderStyle | Gets or sets the border style of the Web server control. (Inherited from WebControl) |
| BorderWidth | Gets or sets the border width of the Web server control. (Inherited from WebControl) |
| ChildControlsCreated | Gets a value that indicates whether the server control's child controls have been created. (Inherited from Control) |
| ClientID | Gets the control ID for HTML markup that is generated by ASP.NET. (Inherited from Control) |
| ClientIDMode | Gets or sets the algorithm that is used to generate the value of the ClientID property. (Inherited from Control) |
| ClientIDSeparator | Gets a character value representing the separator character used in the ClientID property. (Inherited from Control) |
| Context | Gets the HttpContext object associated with the server control for the current Web request. (Inherited from Control) |
| Controls | Gets a ControlCollection object that represents the child controls for a specified server control in the UI hierarchy. (Inherited from Control) |
| ControlStyle | Gets the style of the Web server control. This property is used primarily by control developers. (Inherited from WebControl) |
| ControlStyleCreated | Gets a value indicating whether a Style object has been created for the ControlStyle property. This property is primarily used by control developers. (Inherited from WebControl) |
| ControlToValidate | Gets or sets the input control to validate. (Inherited from BaseValidator) |
| CssClass | Gets or sets the Cascading Style Sheet (CSS) class rendered by the Web server control on the client. (Inherited from WebControl) |
| CultureInvariantValues | Gets or sets a value indicating whether values are converted to a culture-neutral format before being compared. (Inherited from BaseCompareValidator) |
| DataItemContainer | Gets a reference to the naming container if the naming container implements IDataItemContainer. (Inherited from Control) |
| DataKeysContainer | Gets a reference to the naming container if the naming container implements IDataKeysControl. (Inherited from Control) |
| DesignMode | Gets a value indicating whether a control is being used on a design surface. (Inherited from Control) |
| Display | Gets or sets the display behavior of the error message in a validation control. (Inherited from BaseValidator) |
| EnableClientScript | Gets or sets a value indicating whether client-side validation is enabled. (Inherited from BaseValidator) |
| Enabled | Gets or sets a value that indicates whether the validation control is enabled. (Inherited from BaseValidator) |
| EnableTheming | Gets or sets a value indicating whether themes apply to this control. (Inherited from WebControl) |
| EnableViewState | Gets or sets a value indicating whether the server control persists its view state, and the view state of any child controls it contains, to the requesting client. (Inherited from Control) |
| ErrorMessage | Gets or sets the text for the error message displayed in a ValidationSummary control when validation fails. (Inherited from BaseValidator) |
| Events | Gets a list of event handler delegates for the control. This property is read-only. (Inherited from Control) |
| Font | Gets the font properties associated with the Web server control. (Inherited from WebControl) |
| ForeColor | Gets or sets the color of the message displayed when validation fails. (Inherited from BaseValidator) |
| HasAttributes | Gets a value indicating whether the control has attributes set. (Inherited from WebControl) |
| HasChildViewState | Gets a value indicating whether the current server control's child controls have any saved view-state settings. (Inherited from Control) |
| Height | Gets or sets the height of the Web server control. (Inherited from WebControl) |
| ID | Gets or sets the programmatic identifier assigned to the server control. (Inherited from Control) |
| IdSeparator | Gets the character used to separate control identifiers. (Inherited from Control) |
| IsChildControlStateCleared | Gets a value indicating whether controls contained within this control have control state. (Inherited from Control) |
| IsEnabled | Gets a value indicating whether the control is enabled. (Inherited from WebControl) |
| IsTrackingViewState | Gets a value that indicates whether the server control is saving changes to its view state. (Inherited from Control) |
| IsUnobtrusive | Gets a value that indicates whether the control generates unobtrusive JavaScript. (Inherited from BaseValidator) |
| IsValid | Gets or sets a value that indicates whether the associated input control passes validation. (Inherited from BaseValidator) |
| IsViewStateEnabled | Gets a value indicating whether view state is enabled for this control. (Inherited from Control) |
| LoadViewStateByID | Gets a value indicating whether the control participates in loading its view state by ID instead of index. (Inherited from Control) |
| MaximumValue | Gets or sets the maximum value of the validation range. |
| MinimumValue | Gets or sets the minimum value of the validation range. |
| NamingContainer | Gets a reference to the server control's naming container, which creates a unique namespace for differentiating between server controls with the same ID property value. (Inherited from Control) |
| Page | Gets a reference to the Page instance that contains the server control. (Inherited from Control) |
| Parent | Gets a reference to the server control's parent control in the page control hierarchy. (Inherited from Control) |
| PropertiesValid | Gets a value that indicates whether the control specified by the ControlToValidate property is a valid control. (Inherited from BaseValidator) |
| RenderingCompatibility | Gets a value that specifies the ASP.NET version that rendered HTML will be compatible with. (Inherited from Control) |
| RenderUplevel | Gets a value that indicates whether the client's browser supports "uplevel" rendering. (Inherited from BaseValidator) |
| SetFocusOnError | Gets or sets a value that indicates whether focus is set to the control specified by the ControlToValidate property when validation fails. (Inherited from BaseValidator) |
| Site | Gets information about the container that hosts the current control when rendered on a design surface. (Inherited from Control) |
| SkinID | Gets or sets the skin to apply to the control. (Inherited from WebControl) |
| Style | Gets a collection of text attributes that will be rendered as a style attribute on the outer tag of the Web server control. (Inherited from WebControl) |
| SupportsDisabledAttribute | Gets a value that indicates whether the control should set the |
| TabIndex | Gets or sets the tab index of the Web server control. (Inherited from WebControl) |
| TagKey | Gets the HTML tag that is used to render the Label control. (Inherited from Label) |
| TagName | Gets the name of the control tag. This property is used primarily by control developers. (Inherited from WebControl) |
| TemplateControl | Gets or sets a reference to the template that contains this control. (Inherited from Control) |
| TemplateSourceDirectory | Gets the virtual directory of the Page or UserControl that contains the current server control. (Inherited from Control) |
| Text | Gets or sets the text displayed in the validation control when validation fails. (Inherited from BaseValidator) |
| ToolTip | Gets or sets the text displayed when the mouse pointer hovers over the Web server control. (Inherited from WebControl) |
| Type | Gets or sets the data type that the values being compared are converted to before the comparison is made. (Inherited from BaseCompareValidator) |
| UniqueID | Gets the unique, hierarchically qualified identifier for the server control. (Inherited from Control) |
| ValidateRequestMode | Gets or sets a value that indicates whether the control checks client input from the browser for potentially dangerous values. (Inherited from Control) |
| ValidationGroup | Gets or sets the name of the validation group to which this validation control belongs. (Inherited from BaseValidator) |
| ViewState | Gets a dictionary of state information that allows you to save and restore the view state of a server control across multiple requests for the same page. (Inherited from Control) |
| ViewStateIgnoresCase | Gets a value that indicates whether the StateBag object is case-insensitive. (Inherited from Control) |
| ViewStateMode | Gets or sets the view-state mode of this control. (Inherited from Control) |
| Visible | Gets or sets a value that indicates whether a server control is rendered as UI on the page. (Inherited from Control) |
| Width | Gets or sets the width of the Web server control. (Inherited from WebControl) |
Methods
| AddAttributesToRender(HtmlTextWriter) | Adds the HTML attributes and styles for the control that need to be rendered to the specified HtmlTextWriter object. |
| AddedControl(Control, Int32) | Called after a child control is added to the Controls collection of the Control object. (Inherited from Control) |
| AddParsedSubObject(Object) | Notifies the control that an element was parsed and adds the element to the Label control. (Inherited from Label) |
| ApplyStyle(Style) | Copies any nonblank elements of the specified style to the Web control, overwriting any existing style elements of the control. This method is primarily used by control developers. (Inherited from WebControl) |
| ApplyStyleSheetSkin(Page) | Applies the style properties defined in the page style sheet to the control. (Inherited from Control) |
| BeginRenderTracing(TextWriter, Object) | Begins design-time tracing of rendering data. (Inherited from Control) |
| BuildProfileTree(String, Boolean) | Gathers information about the server control and delivers it to the Trace property to be displayed when tracing is enabled for the page. (Inherited from Control) |
| CheckControlValidationProperty(String, String) | Verifies whether the specified control is on the page and contains validation properties. (Inherited from BaseValidator) |
| ClearCachedClientID() | Sets the cached ClientID value to |
| ClearChildControlState() | Deletes the control-state information for the server control's child controls. (Inherited from Control) |
| ClearChildState() | Deletes the view-state and control-state information for all the server control's child controls. (Inherited from Control) |
| ClearChildViewState() | Deletes the view-state information for all the server control's child controls. (Inherited from Control) |
| ClearEffectiveClientIDMode() | Sets the ClientIDMode property of the current control instance and of any child controls to Inherit. (Inherited from Control) |
| ControlPropertiesValid() | This is a check of properties to determine any errors made by the developer. |
| CopyBaseAttributes(WebControl) | Copies the properties not encapsulated by the Style object from the specified Web server control to the Web server control that this method is called from. This method is used primarily by control developers. (Inherited from WebControl) |
| CreateChildControls() | Called by the ASP.NET page framework to notify server controls that use composition-based implementation to create any child controls they contain in preparation for posting back or rendering. (Inherited from Control) |
| CreateControlCollection() | Creates a new ControlCollection object to hold the child controls (both literal and server) of the server control. (Inherited from Control) |
| CreateControlStyle() | Creates the style object that is used internally by the WebControl class to implement all style related properties. This method is used primarily by control developers. (Inherited from WebControl) |
| DataBind() | Binds a data source to the invoked server control and all its child controls. (Inherited from Control) |
| DataBind(Boolean) | Binds a data source to the invoked server control and all its child controls with an option to raise the DataBinding event. (Inherited from Control) |
| DataBindChildren() | Binds a data source to the server control's child controls. (Inherited from Control) |
| DetermineRenderUplevel() | Determines whether the validation control can be rendered for a newer ("uplevel") browser. (Inherited from BaseCompareValidator) |
| Dispose() | Enables a server control to perform final clean up before it is released from memory. (Inherited from Control) |
| EndRenderTracing(TextWriter, Object) | Ends design-time tracing of rendering data. (Inherited from Control) |
| EnsureChildControls() | Determines whether the server control contains child controls. If it does not, it creates child controls. (Inherited from Control) |
| EnsureID() | Creates an identifier for controls that do not have an identifier assigned. (Inherited from Control) |
| Equals(Object) | Determines whether the specified object is equal to the current object. (Inherited from Object) |
| EvaluateIsValid() | Determines whether the content in the input control is valid. |
| FindControl(String) | Searches the current naming container for a server control with the specified |
| FindControl(String, Int32) | Searches the current naming container for a server control with the specified |
| Focus() | Sets input focus to a control. (Inherited from Control) |
| GetControlRenderID(String) | Gets the client ID of the specified control. (Inherited from BaseValidator) |
| GetControlValidationValue(String) | Gets the value associated with the specified input control. (Inherited from BaseValidator) |
| GetDesignModeState() | Gets design-time data for a control. (Inherited from Control) |
| GetHashCode() | Serves as the default hash function. (Inherited from Object) |
| GetRouteUrl(Object) | Gets the URL that corresponds to a set of route parameters. (Inherited from Control) |
| GetRouteUrl(RouteValueDictionary) | Gets the URL that corresponds to a set of route parameters. (Inherited from Control) |
| GetRouteUrl(String, Object) | Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control) |
| GetRouteUrl(String, RouteValueDictionary) | Gets the URL that corresponds to a set of route parameters and a route name. (Inherited from Control) |
| GetType() | Gets the Type of the current instance. (Inherited from Object) |
| GetUniqueIDRelativeTo(Control) | Returns the prefixed portion of the UniqueID property of the specified control. (Inherited from Control) |
| HasControls() | Determines if the server control contains any child controls. (Inherited from Control) |
| HasEvents() | Returns a value indicating whether events are registered for the control or any child controls. (Inherited from Control) |
| IsLiteralContent() | Determines if the server control holds only literal content. (Inherited from Control) |
| LoadControlState(Object) | Restores control-state information from a previous page request that was saved by the SaveControlState() method. (Inherited from Control) |
| LoadViewState(Object) | Loads the previously saved state for the control. (Inherited from Label) |
| MapPathSecure(String) | Retrieves the physical path that a virtual path, either absolute or relative, maps to. (Inherited from Control) |
| MemberwiseClone() | Creates a shallow copy of the current Object. (Inherited from Object) |
| MergeStyle(Style) | Copies any nonblank elements of the specified style to the Web control, but will not overwrite any existing style elements of the control. This method is used primarily by control developers. (Inherited from WebControl) |
| OnBubbleEvent(Object, EventArgs) | Determines whether the event for the server control is passed up the page's UI server control hierarchy. (Inherited from Control) |
| OnDataBinding(EventArgs) | Raises the DataBinding event. (Inherited from Control) |
| OnInit(EventArgs) | Raises the Init event. (Inherited from BaseValidator) |
| OnLoad(EventArgs) | Raises the Load event. (Inherited from Control) |
| OnPreRender(EventArgs) | Raises the PreRender event. (Inherited from BaseValidator) |
| OnUnload(EventArgs) | Raises the Unload event. (Inherited from BaseValidator) |
| OpenFile(String) | Gets a Stream used to read a file. (Inherited from Control) |
| RaiseBubbleEvent(Object, EventArgs) | Assigns any sources of the event and its information to the control's parent. (Inherited from Control) |
| RegisterValidatorCommonScript() | Registers code on the page for client-side validation. (Inherited from BaseValidator) |
| RegisterValidatorDeclaration() | Registers an ECMAScript array declaration using the array name |
| RemovedControl(Control) | Called after a child control is removed from the Controls collection of the Control object. (Inherited from Control) |
| Render(HtmlTextWriter) | Displays the control on the client. (Inherited from BaseValidator) |
| RenderBeginTag(HtmlTextWriter) | Renders the HTML opening tag of the control to the specified writer. This method is used primarily by control developers. (Inherited from WebControl) |
| RenderChildren(HtmlTextWriter) | Outputs the content of a server control's children to a provided HtmlTextWriter object, which writes the content to be rendered on the client. (Inherited from Control) |
| RenderContents(HtmlTextWriter) | Renders the contents of the Label into the specified writer. (Inherited from Label) |
| RenderControl(HtmlTextWriter) | Outputs server control content to a provided HtmlTextWriter object and stores tracing information about the control if tracing is enabled. (Inherited from Control) |
| RenderControl(HtmlTextWriter, ControlAdapter) | Outputs server control content to a provided HtmlTextWriter object using a provided ControlAdapter object. (Inherited from Control) |
| RenderEndTag(HtmlTextWriter) | Renders the HTML closing tag of the control into the specified writer. This method is used primarily by control developers. (Inherited from WebControl) |
| ResolveAdapter() | Gets the control adapter responsible for rendering the specified control. (Inherited from Control) |
| ResolveClientUrl(String) | Gets a URL that can be used by the browser. (Inherited from Control) |
| ResolveUrl(String) | Converts a URL into one that is usable on the requesting client. (Inherited from Control) |
| SaveControlState() | Saves any server control state changes that have occurred since the time the page was posted back to the server. (Inherited from Control) |
| SaveViewState() | Saves any state that was modified after the TrackViewState() method was invoked. (Inherited from WebControl) |
| SetDesignModeState(IDictionary) | Sets design-time data for a control. (Inherited from Control) |
| SetRenderMethodDelegate(RenderMethod) | Assigns an event handler delegate to render the server control and its content into its parent control. (Inherited from Control) |
| SetTraceData(Object, Object) | Sets trace data for design-time tracing of rendering data, using the trace data key and the trace data value. (Inherited from Control) |
| SetTraceData(Object, Object, Object) | Sets trace data for design-time tracing of rendering data, using the traced object, the trace data key, and the trace data value. (Inherited from Control) |
| ToString() | Returns a string that represents the current object. (Inherited from Object) |
| TrackViewState() | Causes the control to track changes to its view state so they can be stored in the object's ViewState property. (Inherited from WebControl) |
| Validate() | Performs validation on the associated input control and updates the IsValid property. (Inherited from BaseValidator) |
Events
| DataBinding | Occurs when the server control binds to a data source. (Inherited from Control) |
| Disposed | Occurs when a server control is released from memory, which is the last stage of the server control lifecycle when an ASP.NET page is requested. (Inherited from Control) |
| Init | Occurs when the server control is initialized, which is the first step in its lifecycle. (Inherited from Control) |
| Load | Occurs when the server control is loaded into the Page object. (Inherited from Control) |
| PreRender | Occurs after the Control object is loaded but prior to rendering. (Inherited from Control) |
| Unload | Occurs when the server control is unloaded from memory. (Inherited from Control) |
Explicit Interface Implementations
Extension Methods
| FindDataSourceControl(Control) | Returns the data source that is associated with the data control for the specified control. |
| FindFieldTemplate(Control, String) | Returns the field template for the specified column in the specified control's naming container. |
| FindMetaTable(Control) | Returns the metatable object for the containing data control. |
Applies to
See also
FAQs
What is the RangeValidator control? ›
The RangeValidator control tests whether the value of an input control is within a specified range. The RangeValidator control uses four key properties to perform its validation. The ControlToValidate property contains the input control to validate.
What data type does the RangeValidator control support? ›Answer: The RangeValidator control supports Integer,String and Date.
How to use range validation in asp net? ›ASP.NET RangeValidator Control. This validator evaluates the value of an input control to check that the value lies between specified ranges. It allows us to check whether the user input is between a specified upper and lower boundary. This range can be numbers, alphabetic characters and dates.
How to set range validator for TextBox in asp net MVC? ›- Write any string in the TextBox. It will display a validation message.
- Now write a value outside of the range, then it will again display a validation message.
- Now write the value within range. Then it accepts it.
In particular, it discusses the DropDownList, RadioButtonList, ListBox, CheckBoxList, and BulletedList controls. You learn how to bind the different types of List controls to a data source such as a database table.
Which of the following is the property of RangeValidator control? ›The most important properties of the RangeValidator control are MaximumValue, MinimumValue, and Type. We must specify the Range from Minimum values to Maximum Values and Type of Input Values.
What are the data list controls? ›The DataList Web server control displays data in a format that you can define using templates and styles. The DataList control is useful for data in any repeating structure, such as a table. The DataList control can display rows in different layouts, such as ordering them in columns or rows.
Which class are all the validation controls derived from? ›The BaseValidator class provides the core implementation for all validation controls. Validation controls are used to validate user input in an associated input control. When the user enters a value that fails validation, the validation control displays an error message.
Which type function is used to access the data type of variable? ›To check the type of any variable data type, we can use the type() function. It will return the type of the mentioned variable data type. Float data type is used to represent decimal point values. Complex numbers are used to represent imaginary values.
How to check validation in ASP.NET c#? ›You can use client-side validation libraries such as WebUIValidation. js in . NET. Server-side validation in ASP.NET is done in the C# code-behind, where the value of the user input is read and validated on the server.
What is data range validation? ›
Data validation is the practice of checking the integrity, accuracy and structure of data before it is used for a business operation. Data validation operation results can provide data used for data analytics, business intelligence or training a machine learning model.
How to validate a TextBox value in C#? ›Step 1: Create a Windows form application. Step 2: Choose “ErrorProvider” form toolbox. Step 3: Select the Text box and go to its properties. In properties choose “Events” and under focus double click on “validating”.
How to validate TextBox in C# Web application? ›- <div>
- Full Name :<asp:TextBox ID="txtName" placeholder="Enter Full Name" runat="server"></asp:TextBox>
1. In the Textbox's KeyPress event, tap the KeyChar and if it is not not within the range for numebers, set the KeyChar to 0. 2. In the Textbox's Validate event, Check the contents with int.
What are the 4 types of list? ›- Unordered list.
- Ordered list.
- Description/ Definition list.
- Nested list.
The four types of control systems are belief systems, boundary systems, diagnostic systems, and interactive system.
What is the difference between listbox and Dropdownlist? ›A standard list box is a box containing a list of multiple items, with multiple items visible. A drop-down list is a list in which the selected item is always visible, and the others are visible on demand by clicking a drop-down button.
Which method forces all validation controls to run? ›Validate() method is used to force all the validation controls to run and to perform validation.
What are the validation controls explain the use of validation controls? ›- The validation control is used to implement page level validity of data entered in the server controls. - This check is done before the page is posted back to the server, thus avoid a round trip to the server. - If the data does not pass validation, it will display an error message to the user.
Which validation control in ASP.NET can be used to determine if data that is entered into a textbox control is of type currency? ›ANSWER: CompareValidator
You can use the CompareValidator control to do a data type check. Set its operator property to DataTypeCheck and its Type property to Currency.
What are three categories of web controls? ›
Web controls fall into five categories: display, input, selection, validation, and special purpose.
Which control can show data from database? ›The FormView control is used to display a single record at a time from a data source.
What are the properties of data list control? ›The DataList control has three properties that allow you to specify whether additions, edits, or deletes are allowed to be made to the data source (AllowAdditions, AllowEdits, and AllowDeletes). All three properties default to true.
What are the types of validation controls? ›- RequiredFieldValidator.
- CompareValidator.
- RangeValidator.
- RegularExpressionValidator.
- CustomValidator.
- ValidationSummary.
The three types of validation are emotional, behavioral and cognitive.
What are the three levels of input validation controls? ›There are three types of data validation checks: (1) field checks, (2) record checks, and (3) file checks.
Who determine the type of data stored in a variable? ›Explanation: Data type determines the type of data stored in a variable. Each Data type is a class. Each instance of these classes has a certain pattern of data. The variables are the instances of the class data type.
What functions can access a local variable? ›Local variables have Function Scope: They can only be accessed from within the function. Since local variables are only recognized inside their functions, variables with the same name can be used in different functions. Local variables are created when a function starts, and deleted when the function is completed.
What data types can be stored in a variable? ›A variable has a data type such as number, string (for text), date, and Boolean (for true or false). An array stores a set of data items, often of the same type.
How to validate web API in C#? ›- Install NuGet package. Install-Package FluentValidation. ...
- Modle Class. namespace ProductsApi.Models. ...
- Product Validator. ...
- Validation Action Filter. ...
- Controller. ...
- Testing Controller Actions.
How to validate the list values in C#? ›
To validate a property, Validator looks for ValidationAttribute for that property and since it doesn't find any validation attribute, it doesn't validate that property. As a result, you need to create some ValidationAttribute to do that for you and decorate properties with validation attributes.
What is the difference between compare validator and range validator? ›CompareValidator Control: It compares the value of one input to another. RangeValidator Control: It is used to check whether the input entered by the user falls under the required range.
What are the 4 levels of validation in data visualization? ›As shown on the figure above, there are four nested levels of vis design, including domain situation, task and data abstraction, visual encoding and interaction idiom, and algorithm.
What is range check validation examples? ›Range checks are validation checks used on data which must fall into a particular range. A lower and upper boundary for sensible values is specified. For example, a secondary school student is likely to be aged between 11 and 16. The computer can be programmed only to accept numbers between 11 and 16.
How do I change the data validation range? ›Go to Data > Data Validation. On the Settings tab, click in the Source box, and then on the worksheet that has the entries for your drop-down list, Select cell contents in Excel containing those entries. You'll see the list range in the Source box change as you select.
How does range validation work? ›The RangeValidator control tests whether the value of an input control is within a specified range. The RangeValidator control uses four key properties to perform its validation. The ControlToValidate property contains the input control to validate.
Is range check validation or verification? ›Range Check – Range check is a validation check which can be applied to numeric fields. This is done to ensure that only numbers within a certain domain can be entered into a field. Remember that this does not necessarily mean that the data entered will be correct. But it will certainly lie within reasonable limits.
How to validate a class object in C#? ›- Validator. TryValidateObject(obj.
- , new ValidationContext(obj)
- , results, true);
- Could you share your attempted code ? ...
- private void button1_Click(object sender, EventArgs e) { int[] arraynumber = new int[10]; arraynumber[0] = int.Parse(textBox1.Text); arraynumber[1] = int.Parse(textBox2.Text); if (arraynumber[0] > arraynumber[1]) { MessageBox.Show("Enter values in ascending order"); } }
The simplest HTML validation feature is the required attribute. To make an input mandatory, add this attribute to the element. When this attribute is set, the element matches the :required UI pseudo-class and the form won't submit, displaying an error message on submission when the input is empty.
How to validate TextBox value? ›
- <script language="javascript" src="../Validation.js" type="text/javascript"></script>
- <script language="javascript" type="text/javascript">
- function Validation() {
- if (Required('<%=txtname.ClientID%>', 'Enter Name'))
- <form action="/action_page.php" method="post">
- <input type="text" name="fname" required>
- <input type="submit" value="Submit">
IsNumber() is a C# method that is used to check whether a certain character or character in a string at a specified position is categorized as a number or not. If it is a number, then a Boolean True value is returned. If it is not a number, then a False value is returned.
What is validation in C#? ›The validation attributes specify behavior that you want to enforce on the model properties they are applied to. The Required attribute indicates that a property must have a value; in this sample, a movie has to have values for the Title , ReleaseDate , Genre , and Price properties in order to be valid.
What is validation summary? ›ValidationSummary is an extension that allows you to summarize validation errors from multiple data editors.
What is the purpose of code behind? ›The primary goal of the code-behind file is to enable you to write more modular code so that you can keep the code and layout physically separate. By keeping the code and layout separate, you can exploit the native object orientation of the .
Which validation control displays all error messages at the bottom of the page? ›ASP.NET ValidationSummary Control. This validator is used to display list of all validation errors in the web form. It allows us to summarize the error messages at a single location.
What is ASP.NET file types? ›ASP.NET pages have the extension . aspx, and are normally written in VB (Visual Basic) or C# (C sharp). User controls in ASP.NET can be written in different languages, including C++ and Java.
What are the 4 types of validation? ›- A) Prospective validation (or premarket validation)
- B) Retrospective validation.
- C) Concurrent validation.
- D) Revalidation.
In traditional software application platforms, code represents instructions that tell platforms how to implement desired functionality. With no code, the app creator defines what the app does rather than how it does it.
What is the difference between inline code and code-behind? ›
One major point of Code-Behind is that the code for all the Web pages is compiled into a DLL file that allows the web pages to be hosted free from any Inline Server Code. Inline Code refers to the code that is written inside an ASP.NET Web Page that has an extension of . aspx.
How do I view code-behind ASPX? ›Right-click the . aspx page, and then click View Code. The code-behind file opens in the editor.
How do I fix validation errors? ›- Choose the row that contains the Invalid Work Item Type issue, choose Choose Values, and then specify the type of work item that you want to associate with the task. Note. ...
- If no more issues occur, choose Save and Publish.
What is HTML validation? Checking HTML validation errors is a quick way to find possibly unintended behavior in your code. For example, the error below highlights that an empty src attribute was supplied for an img tag. There's also a "duplicate attribute" message on the same element.
What are the six basic file types? ›- JPEG.
- PNG.
- GIF.
- PDF.
- SVG.
- MP4.
In this guide, we'll explore some of the different types of files for the 4 primary file types: document, image, video, and audio.
Why is web config file used? ›The Web. Config file is used to configure Oracle Web Application functionality. This file is typically installed in the c:\Inetput\wwwroot\WebApp directory. This section describes settings in the top-level WebApp Web.