Asp.Net CompareValidator Control

Asp.Net CS By Example 22 December 2019

The CompareValidator :

The CompareValidator control enables we to perform three different types of validation tasks. we can use the CompareValidator to perform a data type check.

Syntax:

<asp:CompareValidator ID="CompareValidator1" runat="server" ControlToValidate="txtAge" Operator="DataTypeCheck" Type="Integer" ErrorMessage="|| (Invalid Age || " Display="None" ValidationGroup="Validation" SetFocusOnError="true" />

The CompareValidator has six important properties:

Sr.No	Property	Description
1)	ID	Set the uniqe value to control to access in code-behind code.
2)	ControlToValidate	which control is check or The ID of the form field validated.
3)	Text	The error message displayed when validation fails.
4)	Operator	The type of comparison to perform. Possible values are DataTypeCheck, Equal, GreaterThan, GreaterThanEqual, LessThan, LessThanEqual, and NotEqual.
5)	ValueToCompare	The fixed value against which to compare.
6)	Type	The type of value compared. Possible values are String, Integer, Double,Date, and Currency.

Code: CompareValidatorDemo.aspx

<%@ 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 id="Head1" runat="server">
    <title></title>
     <style>
        .column
        {
            float: left;
            width: 30%;
            margin-left: 10px;
            background-color: white;
            border: solid 1px black;
            padding: 10px;
            width: 70%;
        }
        fieldset
        {
            background-color: #a9a9a9;
            border: solid 2px #d81a72;
            color:Black;
            width:93%;
        }
    </style>
</head>
<body style="width: 70%;">
    <form id="form1" runat="server" >
    <div class="column">
        <fieldset>
            <legend>CompareValidator Demo</legend>
            <asp:Label ID="Label1" Text="Start Date:" runat="server" />
            <asp:TextBox ID="txtStartDt" runat="server" ValidationGroup="CompareValidator" />
            <br />
            <br />
            <asp:Label ID="Label2" Text="End Date:" runat="server" />
            <asp:TextBox ID="txtEndDt" runat="server" ValidationGroup="CompareValidator" />
            <asp:CompareValidator ID="cvDateCompare" ErrorMessage="(End date must be greater than start date)"
                ValidationGroup="CompareValidator" ControlToValidate="txtStartDt" ControlToCompare="txtEndDt"
                EnableClientScript="true" Type="Date" Operator="LessThan" SetFocusOnError="true"
                runat="server" />
            <br />
            <asp:Button ID="btncvSubmit" Text="Submit" runat="server" ValidationGroup="CompareValidator" />
            <asp:Button ID="btncvReset" Text="Reset" runat="server" ValidationGroup="CompareValidator"
                CausesValidation="false" />
        </fieldset>
    </div>
    

    </form>
</body>
</html>

Output:

Thanks for reading Asp.Net CompareValidator Control