Asp.net site navigation tutorial - contributed by Nihal Singh

2. Cross-page posting

By default, buttons and other controls that cause a postback on an ASP.NET Web page submit the page back to itself. ASP.Net provides a feature known as Cross Page PostBack that enables a web form to post-back to a different web form. The Page class has a property named PreviousPage. If the source page and target page are in the same ASP.NET application, the PreviousPage property in the target page contains a reference to the source page.

Example:

We have two web pages named Home.aspx and Welcome.aspx respectively. The first page contains a Button and a Textbox. Button control that has its PostBackUrl property set to “~/Welcome.aspx”

// Sample code for Welcome.aspx.

if (Page.PreviousPage != null)
{
              TextBox MyTextBox = (TextBox)Page.PreviousPage.FindControl("TextBox1");
              if (MyTextBox!= null)
              {
                            Label1.Text = MyTextBox.Text;
              }
}

3. Client-side browser redirect

The Page. Response object has redirect method. The Redirect method can be used in your server-side code to instruct the browser to initiate a request for another Web page. The redirect is not a PostBack. It is similar to the user clicking a hyperlink on a Web page.

protected void Button1_Click(object sender, EventArgs e)
{
              Response.Redirect("CarrerRide.aspx");
}

4 Server-side transfer

The Transfer method transfers all the state information in one ASP .NET Page to a second ASP.NET Page. Server.Transfer changes the page being rendered on the browser. This happens all on the server. A redirect is not issued to the web browser.

protected void Button1_Click(object sender, EventArgs e)
{
              Server.Transfer("CarrerRide.aspx", false);
}