how to use server. transfer in asp.net c#

Try
http://msdn.microsoft.com/en-us/library/ms525800%28v=vs.90%29.aspx[^]
http://support.microsoft.com/kb/219294[^]
http://www.w3schools.com/asp/met_transfer.asp[^]
http://www.dotnetperls.com/server-transfer[^]

you can use session for alternative

Session["a"]=txtUsername.Text;
Server.Transfer("Serverside.aspx")


in Serverside.aspx page

u can get this session by

Label1.Text=Session["a"],ToString();

Hi,

Server Side Transfer
In this method, the server will initiate the navigation like Client side browser redirect, but here the server code will simply hand over the control to some other web page so that the new page will then be rendered.

Server.Transfer("path"); 

Example

Server.Transfer("Serverside.aspx")

Here URL is not changed. That's because the browser had no idea that server has pushed another page for its request. Browser still thinks that it is displaying the old URL's page.

for Example Add a Link Button in Default.aspx Page:

Step-1

<asp:LinkButton ID="LinkButton1" runat="server" onclick="LinkButton1_Click">Use Server.Transfer

Now under Link Button Click Event write the below code:
C# Code:

protected void LinkButton1_Click(object sender, EventArgs e)
{
    HttpContext CurrContext = HttpContext.Current;
    CurrContext.Items.Add("Name","Santosh");
    CurrContext.Items.Add("Address","Bhubaneswar");
    Server.Transfer("About.aspx");

}

Now we need to catch Default page Stored Data in About page:
C# Code:

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
 
        HttpContext CurrContext = HttpContext.Current;
        Response.Write(CurrContext.Items["Name"].ToString() + "br/");
        Response.Write(CurrContext.Items["Address"].ToString());
    }
}

Hope now you can transfer data from one page to another page using Server.Transfer Method.

This will show you how ans when should you use this:

Understanding Page Navigation Techniques in ASP.NET[^]

Actually Server.Transfer Method is not useful in many case since it will throw an error ASP0173 if we're using any sort of the Special Symbol in the Server.Transfer("pageUrl?querystring") it will throw an error asp0173 since it will not accept any sort of the Special chacters , The only one advantage of using Server.Transfer is it only forward 1 request to the server while response.redirect forwards two requests to the server.
Server.Transfer is added as an alternative to the Response.Redirect but it's limitation and drawaback never makes it popular,
If you wanted to have more secure redirection you can use Response.Write(Server.URLEncode("pageurl")); but still it has limitation if you're not using it properly , the other alternative is to use the UrlRedirect : "I am Recommanding you to use it"
Till date it is the only highly Secure Method of the Page redirect is available. you can read it at
http://www.c-sharpcorner.com/UploadFile/rohatash/url-routing-in-Asp-Net-4-0/

Thanks and Regard,
Abhinav Kumar Singh(abhinavsingh993),
Software Tester,
Goodmaysys Software Pvt. Ltd.
Lucknow.