How and when to use Server.Execute and Server.Transfer

The Server-side include was used to insert code from another page into the current one. All server-side include are carried out before any. This means that if you want to use your ASP code to determine what file to include, you are in trouble. This is why you might want to use Server.Execute.



Server.Execute (path) execute the ASP script specified by path. If path is an absolute path, it should be for an ASP page within the same application space (the same folder or one of its subfolder) path may contain query string date.

Suppose for a moment that you want some information at the top and bottom of every page on your site. This might be some graphics, links, contact information, and so on. One way you could do this is to include some file at the top of every page and another one at the bottom. This will work, but it lacks some flexibility. You might decide that you want two different ways to view each page. If you want to keep your options open for expansion, you might decide to use server. Execute.

Transferring Control to another Page

Server.Transfer is used to transfer control to another ASP page. When it is called, all the data related to the calling page is transferred to the new page. This means that if variables of session or application scope has been given values, those values are kept in the new page. State information and values for the built-in objects are transferred, too. Also the contents of the request collections are kept and are available to the new page.

You can even perform a server.Transfer between two pages in separate applications. In this case, the value of the application variables and objects will be the same as if the second page were in the same application as the first. That is, the values of application scope variables and objects are kept after the transfer.

Demonstrates How to Use Server.Execute

<%@ LANGUAGE=VBSCRIPT %>
<% Option Explicit %>
<HTML>
<BODY>
<%
Response.Write( “I am in page 1 <BR>”)
Server.Transfer(“page2.asp”)
Response.Write(“Back in page 1”)
%>
< / BODY>
</HTML>

This page is almost identical to page1.asp. the only difference is that line 7 uses a server. Transfer in place of the server.Execute. You can see the result of this listing. Notice that in this version, the third line is not printed. That is because you never return to the calling page when you do a server.Transfer. In this regard, server.Transfer may be used a bit like the Response. Redirect.

Redirect tells the user’s browser to make a new request. This result in the creation of a new object context, which is used to contain the session and request objects as well as some server variables. Sometime when you want to send the user to different page, you will want a new object context to be created. In such case, you should use Response.Redirect.

If you do not need a new object context, you are probably better off using server.Transfer, which is faster because it dose not involve as many communications or the creation of a new object context.

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