响应。重定向只是向浏览器发送一条消息(HTTP 302)。

服务器。传输在浏览器一无所知的情况下发生，浏览器请求一个页面，但服务器返回另一个页面的内容。

Response.Redirect()应该在以下情况下使用:

我们希望将请求重定向到我们服务器上的一些普通HTML页面或其他web服务器 我们不关心在每个请求上引起到服务器的额外往返 我们不需要保留原始请求中的查询字符串和表单变量 我们希望我们的用户能够看到新的重定向URL，他在他的浏览器重定向(并能够收藏它，如果它的必要)

Server.Transfer()应该在以下情况下使用:

我们希望将当前页面请求传输到同一服务器上的另一个.aspx页面 我们希望保留服务器资源并避免到服务器的不必要的往返 我们想保留查询字符串和表单变量(可选) 我们不需要在用户的Web浏览器中显示我们重定向请求的真实URL

更多关于Transfer()的细节，它实际上是Server.Execute() + Response.End()，它的源代码如下(来自Mono/.net 4.0):

public void Transfer (string path, bool preserveForm)
{
    this.Execute (path, null, preserveForm, true);
    this.context.Response.End ();
}

对于Execute()，它要运行的是给定路径的处理程序，参见

ASP.NET does not verify that the current user is authorized to view the resource delivered by the Execute method. Although the ASP.NET authorization and authentication logic runs before the original resource handler is called, ASP.NET directly calls the handler indicated by the Execute method and does not rerun authentication and authorization logic for the new resource. If your application's security policy requires clients to have appropriate authorization to access the resource, the application should force reauthorization or provide a custom access-control mechanism. You can force reauthorization by using the Redirect method instead of the Execute method. Redirect performs a client-side redirect in which the browser requests the new resource. Because this redirect is a new request entering the system, it is subjected to all the authentication and authorization logic of both Internet Information Services (IIS) and ASP.NET security policy. -from MSDN

响应。重定向只是向浏览器发送一条消息(HTTP 302)。

服务器。传输在浏览器一无所知的情况下发生，浏览器请求一个页面，但服务器返回另一个页面的内容。

Response.Redirect Response.Redirect() will send you to a new page, update the address bar and add it to the Browser History. On your browser you can click back. It redirects the request to some plain HTML pages on our server or to some other web server. It causes additional roundtrips to the server on each request. It doesn’t preserve Query String and Form Variables from the original request. It enables to see the new redirected URL where it is redirected in the browser (and be able to bookmark it if it’s necessary). Response. Redirect simply sends a message down to the (HTTP 302) browser.

Server.Transfer Server.Transfer() does not change the address bar, we cannot hit back.One should use Server.Transfer() when he/she doesn’t want the user to see where he is going. Sometime on a "loading" type page. It transfers current page request to another .aspx page on the same server. It preserves server resources and avoids the unnecessary roundtrips to the server. It preserves Query String and Form Variables (optionally). It doesn’t show the real URL where it redirects the request in the users Web Browser. Server.Transfer happens without the browser knowing anything, the browser request a page, but the server returns the content of another.

响应。重定向在第一个页面到达客户端后将页面重定向到另一个页面。所以客户端知道重定向。

服务器。传输退出页面的当前执行。客户端不知道重定向。它允许您传输查询字符串和表单变量。

所以这取决于你的需要来选择哪个更好。