Introduction:
In this article today I am going to explain Querystring in asp.net with example
Description:
Querystring is a way to passing data from one page to
another page through the URL. Data that is append to end of a page URL. We pass
the information from one page and on another page can retrieve it.
Advantages:
1. It is supported by all browsers.
2. Querystring is easy to use.
3. Server resources are not required.
4. Extra afford are not needed to code.
Disadvantages:
1. All information is visible to user. Therefore, it is
not secure.
2. There is a limit to URL length of 255 characters.
Example:
I have added two webforms to project. One page has
textbox and button control. I want to pass the textbox enter value to next page
on button click.
HTML markup of
First page:
<fieldset
style="width:400px">
<legend>Querystring
Example</legend>
<table>
<tr><td>Book Name:</td><td> <asp:TextBox ID="txtname"
runat="server"></asp:TextBox></td></tr>
<tr><td></td><td><asp:Button ID="btnsend" runat="server" Text="Send" onclick="Button1_Click" /></td></tr>
</table>
</fieldset>
On button click write the given code (C#):
protected
void Button1_Click(object
sender, EventArgs e)
{
Response.Redirect("webform2.aspx?bname="+txtname.Text);
}
VB:
Protected Sub Button1_Click(sender As
Object, e As
System.EventArgs) Handles
btnsend.Click
Response.Redirect("webform2.aspx?bname=" + txtname.Text)
End Sub
Html Markup of
Second page where get the value:
<table>
<tr><td>Book Name:</td><td><asp:Label ID="lblbname" runat="server" Text=""></asp:Label></td></tr>
<tr><td></td><td></td></tr>
</table>
Write the below given code to get the value (C#):
protected void Page_Load(object sender, EventArgs
e)
{
if (!IsPostBack)
{
lblbname.Text = Request.QueryString["bname"];
}
}
VB:
Protected Sub
Page_Load(ByVal sender As
Object, ByVal e
As EventArgs)
Handles Me.Load
If Not IsPostBack Then
lblbname.Text = Request.QueryString("bname").ToString()
End If
End Sub
Output:
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