In this blog we will know how to Validate Textbox using
javascript.
<%@ Page Language="C#"
AutoEventWireup="true"
CodeBehind="WebForm1.aspx.cs"
Inherits="Validate_Textbox_using_javascript.WebForm1"
%>
<!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>Untitled
Page</title>
<script language="javascript" type="text/javascript">
function
validate()
{
if
(document.getElementById("<%=txt_name.ClientID%>").value=="")
{
alert("Name
Feild can not be blank");
document.getElementById("<%=txt_name.ClientID%>").focus();
return
false;
}
return true;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txt_name" runat="server"></asp:TextBox>
<asp:Button ID="btn_register" runat="server"
OnClientClick ="javascript:validate()" Text="Register" onclick="btn_register_Click"/>
<asp:Label ID="lblmsg" runat="server" Text="Label"></asp:Label>
</div>
</form>
</body>
</html>
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
Validate_Textbox_using_javascript
{
public partial class WebForm1 : System.Web.UI.Page
{
string
connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand
com;
protected
void btn_register_Click(object sender, EventArgs e)
{
if
(txt_name.Text == "")
{
txt_name.Focus();
}
else
{
SqlConnection
con = new SqlConnection(connStr);
com = new
SqlCommand();
com.Connection = con;
com.CommandType = CommandType.Text;
com.CommandText = "insert into test values(@name)";
com.Parameters.Clear();
com.Parameters.AddWithValue("@name", txt_name.Text);
if
(con.State == ConnectionState.Closed)
con.Open();
com.ExecuteNonQuery();
con.Close();
lblmsg.Text = "Data entered successfully!!!";
}
}
}
}