how do I return to the same exact page after posting a form?

I'm posting data to a page called process.aspx that handles some business logic with the following code:

<%@ Page Language="C#" %>
<%
    MyData.process(Request);
    Response.Redirect("")
%>

this pa开发者_运维问答ge I will be calling from a variety of pages. Is there some way of knowing from which page my form was submitted? I was thinking something along the lines of writing:

 <form id="frmSystem" method="post" action="process.aspx?page=<%=  %>">

However I don't know what to write in between the <%= %> to get the current page name. Can anyone help please?

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You can capture the calling page URL and hold it in Session or ViewState for later use.

For example, in Page_Load,

Session["PreviousPage"] = Request.Url.ToString();

And then in your final event (perhaps Savebutton_Click or CloseButton_Click), you can do a redirect in either of these ways:

Server.Transfer(Session["PreviousPage"].ToString(), false);

or

Response.Redirect(Session["PreviousPage"].ToString(), false);

You can also get the URL of the calling page this way:

Request.ServerVariables("HTTP_REFERER")

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You could pass in it in via a property like the ReturnUrl similar how a sign in page works. This is kind of how you are doing it up there.

You could also try to use the HttpContext.Current.Request.UrlReferrer to see who referred you.

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You can use Request.UrlReferrer.OriginalString to get the URI of the referring page.