Tuesday, May 14, 2013

RequiredFieldValidator Control asp.net

RequiredFieldValidator Control

Evaluates the value of an input control to ensure that the user enters a value.

Syntax :

<asp:RequiredFieldValidator ID="req" runat="server" ControlToValidate="txt" ErrorMessage="Please Enter Required value" Display="Dynamic" ></asp:RequiredFieldValidator>

Where

   ControlToValidate= "Control which have to validate"
    ErrorMessage ="Define custom error message
"  Display= "Error message display property :
                   Three types Dynamic,Static,None


Example :

Default.aspx :

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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 runat="server">
    <title>Required Field validator Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <h1>
    Required Field validator Example
    </h1>
    <div>
    <asp:TextBox ID="txt" runat="server"></asp:TextBox>
   
    <asp:RequiredFieldValidator ID="req" runat="server" ControlToValidate="txt" ErrorMessage="Please enter text box value" Display="Dynamic"></asp:RequiredFieldValidator>
        <asp:Button ID="Button1" runat="server" Text="Submit" CausesValidation="true"/>
   
    </div>
    </form>
</body>
RequiredFieldValidator Control asp.net</html>
           
Download Source code : RequiredFieldValidator Control asp.net

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