ASP.NET CompareValidator for Data Type Validation

ASP.NET CompareValidator is used to check Data Type of input value. The CompareValidator control belongs to System.Web.UI.WebControls

Syntax

<asp:comparevalidator id="checkDate" controltovalidate="TextBox2" 
ErrorMessage="Enter date only" operator="DataTypeCheck" type="Date" runat="server"></asp:comparevalidator>

ASP.NET CompareValidator Control Property

Property	Description
ControlToValidate	Specifies control name which needs to be validate.
Display	Specifies behavior of the error message.
EnableClientScript	Specifies whether or not client-side validation is enabled.
Enabled	Specifies whether or not validation control is enabled or not.
ErrorMessage	Specifies error messageto be display in validation summary.
ForeColor	Specifies error message color.
IsValid	Indicate if associate control passes validation or not.
SetFocusOnError	Set focus on associate control if validation fails.
Text	Specifies text to be display if validation fails.
ValidationGroup	Specifies validation group name.
Validate	Update the isvalid propery.
ValidateGetValidationProperty	Determineing validation property of a control, if it exists.

ValidationExpression	Specifies operator and type property that you want to match against input value.

ASP.NET CompareValidator for Data Type Validation Example

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" 
Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="https://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ASP.NET Date Validation Using CompareValidator Example</title>
</head>
<body>
<form id="Form" runat="server">
<div style="width: 619px">
<asp:Label ID="lblTitle" runat="server" Font-Bold="True" Font-Size="Medium" 
Font-Underline="True" Text="ASP.NET Date Type Validation Example"></asp:Label><br/><br/>
<table border="0" width="600px" cellpadding="0" cellspacing="0">
<tr><td>
<asp:Label ID="lblDate" runat="server" Font-Bold="True" Font-Size="Small" 
Text="Enter Date:"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server" Width="177px"></asp:TextBox>
<asp:comparevalidator id="checkDate" controltovalidate="TextBox2" 
ErrorMessage="Enter date only"
operator="DataTypeCheck" type="Date" runat="server"></asp:comparevalidator>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
ControlToValidate="TextBox2" 
ErrorMessage="This is required field, can not be blank."></asp:RequiredFieldValidator>
</td></tr>
<tr><td>
<asp:Button ID="btnSubmit" runat="server" Font-Bold="True" 
Font-Size="Small" Text="Submit" Width="60px" />
</td></tr>
</table>   
</div> 
</form>
</body>
</html>

Above example will produce following output

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asp.net Page_LoadCompleted event

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Page_Prerender

asp.net Page_Prerender event

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ASP.NET Validation Controls 37

RequiredFieldValidator

RequiredFieldValidator - Form Validation

Set focus on error RequiredFieldValidator

Set initial default value using initialValue property - RequiredFieldValidator

Display summary popup for all require field

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Enable disable RequiredFieldValidator client-side

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RegularExpressionValidator

Email validation using RegularExpressionValidator

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RangValidator

Check minimum and maximum value using RangeValidator

Check data type using RangeValidator

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Minimum Maximum value, ControlToValide and ErrorMessage property of RangeValidator

CompareValidator

Compare two input control using CompareValidator

Check data type using CompareValidator

Compare data type operator using CompareValidator

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CustomValidator

Associate CustomValidator to control

Validation client and server side using CustomValidator

ValidationSummary

Display a list of error message using ValidationSummary

Display popup message using ValidationSummary

Different display mode of ValidationSummay

Grouping in ValidationSummary

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