CustomValidator control example

CustomValidator - Checks the form field's value against custom validation logic that you, the developer, provide. 
The CustomValidator control allows you to write a method to handle the validation of the value entered

Property:-
BackColor:- The background color of the CustomValidator control 
ClientValidationFunction:- Specifies the name of the client-side validation script function to be executed. Note: The script must be in a language that the browser supports, such as VBScript or JScript 
With VBScript, the function must be in the form:

Sub FunctionName (source, arguments)

With JScript, the function must be in the form:

Function FunctionName (source, arguments)
 
ControlToValidate :-The id of the control to validate 
Display The display behavior for the validation control. Legal values are: 
None :-(the control is not displayed. Used to show the error message only in the ValidationSummary control) 
Static :-(the control displays an error message if validation fails. Space is reserved on the page for the message even if the input passes validation. 
Dynamic :-(the control displays an error message if validation fails. Space is not reserved on the page for the message if the input passes validation 
 
EnableClientScript :-A Boolean value that specifies whether client-side validation is enabled or not 
Enabled :-A Boolean value that specifies whether the validation control is enabled or not 
ErrorMessage:- The text to display in the ValidationSummary control when validation fails. Note: This text will also be displayed in the validation control if the Text property is not set 
ForeColor:- The foreground color of the control 
id A unique id for the control 
IsValid:- A Boolean value that indicates whether the control specified by ControlToValidate is determined to be valid 
OnServerValidate:- Specifies the name of the server-side validation script function to be executed 
runat:- Specifies that the control is a server control. Must be set to "server" 
Text :-The message to display when validation fails

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















    Untitled Page    


    
   
    
    
                          
        
       
        
        "Text must be greater than 10 characters"
    
     
        

                                     
        

                                           
        
   
        

                                 
    
    
    


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...........................cs code.................................
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
   
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (Page.IsValid) 
         Response.Write("Page has passed validation.");
        
    }
}
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