click Event Problem

ThanQ Kunal Vaishya for Replyg

This is not working in my application


 is there any other solution.....

ThanQ    Satyapriya Nayak For Replying .


But My app , i just sending parameters to method and getting result...



 is there any other solution.....

Dear you cant stop like this

                       do one thing first time when you click the save buttons then after save clear the data in controls and after when you click on save buttons then firstly check it control is empty or not if empty then return from event or skip to save the record

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





   


   

   

   
           
               
           
           
               
               
           
           
               
               
           
           
               
           
           
               
           
       

Registraion
Name:                        ControlToValidate="txtName" ErrorMessage="Name Required">
Email                        ControlToValidate="txtEmail" ErrorMessage="Email Required">
onclick="btn_register_Click" />

   

   

using System;
using System.Collections;
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;
using System.Data.SqlClient;
namespace Insert
{
    public partial class _Default : System.Web.UI.Page
    {
        string strConnString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
        SqlCommand com;

        protected void btn_register_Click(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection(strConnString);
            com = new SqlCommand();
            com.Connection = con;
            com.CommandType = CommandType.Text;
            com.CommandText = "insert into login values(@Name,@Email)";
            com.Parameters.Clear();
            com.Parameters.AddWithValue("@Name", txtName.Text);
            com.Parameters.AddWithValue("@Email", txtEmail.Text);
            if (con.State == ConnectionState.Closed)
                con.Open();
            com.ExecuteNonQuery();
            con.Close();
            lblmsg.Text = "Data entered successfully!!!";
            clear();
        }
        void clear()
        {
            txtName.Text = "";
            txtEmail.Text = "";
        }
    }
}

First of all, your database should not allow duplicate rows. Your table don't have any primary key column?

Secondly, If you don't want primary key column on your database, you front end should check the data already entered. If so, should return from the handler of the the button.

The above methods are functionally right.

The worst answer is:
Disable the button on the button click handler, after the insert operation. Your user now can click only once. If they complain about the button disabled after a single click, just react to them like 

Cool Man