Write a program to check whether empty query string is entered in Asp.Net.
Take an one web Page give any Suitable name as you want.
Here Page taken with the name of Default1.aspx
Page1: Default1.aspx
Design:
<html
xmlns="http://www.w3.org/1999/xhtml">
<head
runat="server">
<title></title>
</head>
<body>
<form id="form1"
runat="server">
<div>
<br />
<asp:TextBox
ID="txtUserid" runat="server"></asp:TextBox>
<br />
<asp:Button ID="QuerySend"
runat="server" onclick="QuerySend_Click"
Text="Send"/>
</div>
</form>
</body>
</html>
Code:-
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
public
partial class Default1 : System.Web.UI.Page
{
protected void Page_Load(object sender,
EventArgs e)
{
}
protected void QuerySend_Click(object
sender, EventArgs e)
{
Response.Redirect("Default2.aspx?UserId=" + txtUserid.Text);
}
}
Now take an another web page
Page2: Default2.aspx
Design:
<html
xmlns="http://www.w3.org/1999/xhtml">
<head
runat="server">
<title></title>
</head>
<body>
<form id="form1"
runat="server">
<div>
<asp:Label ID="lblUserid"
runat="server" Text="Label"></asp:Label>
</div>
</form>
</body>
</html>
Code:-
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
public
partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender,
EventArgs e)
{
if (!IsPostBack)
{
if (!string.IsNullOrEmpty(Request.QueryString["UserId"].ToString()))
{
lblUserid.Text =
Request.QueryString["UserId"];
}
else
{
lblUserid.Text = "Empty
String";
}
}
}
}
