Practical : 17
Subject : .Net
Aim : Write a program to check whether empty query string is entered in Asp.Net.
Source Code :
//file.aspx
<%@ Page Language="C#"
AutoEventWireup="true" CodeBehind="pra17.aspx.cs"
Inherits="dotnet008asp.pra17" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>pratik008</title>
</head>
<body>
<form
id="form1" runat="server">
<asp:Label
ID="lblname" runat="server"
Text="Name"></asp:Label>
<asp:TextBox ID="txtname"
runat="server"></asp:TextBox>
<asp:Button
ID="btnsubmit" runat="server"
OnClick="Button1_Click" Text="submit" />
<asp:Label
ID="lblmsg" runat="server" Text="Label"
Visible="False"></asp:Label>
</form>
</body>
</html>
//file.aspx.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace dotnet008asp
{
public partial
class pra17 : System.Web.UI.Page
{
protected void
Button1_Click(object sender, EventArgs e)
{
string
name=txtname.Text;
if
(string.IsNullOrEmpty(name))
{
lblmsg.Text = "Empty string enterd";
}
else
{
lblmsg.Text = "Welcome " + name;
}
lblmsg.Visible = true;
}
}
}
Output :
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