I can use both code behind and java script for the button control e.gLogin.aspx file with 2 text box and submit button Using java script to validate user name/pass word text box as like below:<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %><!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"><script language = "javascript" > function validate() { if (document.getElementById("<%=txtUsername.ClientID%>").value == "") { alert("User name cannot be blank"); document.getElementById("<%=txtUsername.ClientID%>").focus(); return false; } if (document.getElementById("<%=txtPassword.ClientID%>").value == "") { alert("Password cannot be blank"); document.getElementById("<%=txtPassword.ClientID%>").focus(); return false;} return true;}</script> <title></title></head><body> <form runat="server" id = "LoginAuth" method ="post" > <div> UserName: <asp:TextBox ID="txtUsername" runat="server"></asp:TextBox> <br /> Password: <asp:TextBox ID="txtPassword" runat="server"></asp:TextBox> <br /> <asp:Button ID="cmdButton" runat="server" Text="Submit" onclick="cmdButton_Click" /> </div> <asp:Label ID="lblMsg" runat="server" ></asp:Label> </form></body></html>Login.aspx.cs code behind file can have following code: to connect to db and add javascript function to the button control.using System;using System.Collections.Generic;using System.Linq;using System.Web;using System.Web.UI;using System.Web.UI.WebControls;using System.Data;using System.Data.SqlClient;using System.Configuration;//Configuration Managerusing System.Web.Security; //for FormAuthenticationpublic partial class Login : System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { cmdButton.Attributes.Add("onclick", "return validate()"); } protected void cmdButton_Click(object sender, EventArgs e) { if (Page.IsValid) { if (dbconn(txtUsername.Text.Trim(), txtPassword.Text.Trim())== true ) { FormsAuthentication.RedirectFromLoginPage(txtUsername.Text, false ); } else { lblMsg.Text = "Invalid UserName and Password€"; } } } public bool dbconn(string u, string p) { SqlConnection conn = new SqlConnection(); conn.ConnectionString = ConfigurationManager.ConnectionStrings["NWConn"].ConnectionString; conn.Open(); SqlCommand cmd = new SqlCommand("sp_ValidateUser", conn); cmd.CommandType = CommandType.StoredProcedure; SqlParameter userParam, passwordparam, retValueparam; userParam = cmd.Parameters.Add("@UserName", SqlDbType.VarChar, 50) ; passwordparam=cmd.Parameters.Add("QPassWord", SqlDbType.VarChar, 50); retValueparam= cmd.Parameters.Add("@RetValue", SqlDbType.Int); userParam.Direction = ParameterDirection.Input; passwordparam.Direction = ParameterDirection.Input; retValueparam.Direction = ParameterDirection.ReturnValue ; userParam.Value = txtUsername.Text.ToString(); passwordparam.Value = txtPassword.Text.ToString(); //try //{ if (conn.State == ConnectionState.Closed) { conn.Open(); cmd.ExecuteNonQuery(); } //Obtain the return value of the stored procedure into a variable int retValue = (int)retValueparam.Value; if (retValue < 1) { return false ; } else { //Return true to indicate that the login is successful return true; } //} //catch (Exception ex) //{ // lblMsg.Text = ex.Message + "Error connecting to DB"; //} //return false; }}
Please use the following method for using both the code behing and java script in the same control:
<%
<!
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alert(
}
{
Response.Write(
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You have to define two separate code blocks for writing server side and client side code. And also need to associate the sever events to the server side methods/events and client events to the client side method/functions.
Hi Mallika
You can use code behind nad JavaScript on a same page like as follows:
Example: