简而言之:回应。重定向只是告诉浏览器访问另一个页面。服务器。Transfer有助于减少服务器请求，保持URL相同，并且通过一些错误处理，允许您传输查询字符串和表单变量。

我发现并同意以下观点:

Server.Transfer is similar in that it sends the user to another page with a statement such as Server.Transfer("WebForm2.aspx"). However, the statement has a number of distinct advantages and disadvantages. Firstly, transferring to another page using Server.Transfer conserves server resources. Instead of telling the browser to redirect, it simply changes the "focus" on the Web server and transfers the request. This means you don't get quite as many HTTP requests coming through, which therefore eases the pressure on your Web server and makes your applications run faster. But watch out: because the "transfer" process can work on only those sites running on the server; you can't use Server.Transfer to send the user to an external site. Only Response.Redirect can do that. Secondly, Server.Transfer maintains the original URL in the browser. This can really help streamline data entry techniques, although it may make for confusion when debugging. That's not all: The Server.Transfer method also has a second parameter—"preserveForm". If you set this to True, using a statement such as Server.Transfer("WebForm2.aspx", True), the existing query string and any form variables will still be available to the page you are transferring to. For example, if your WebForm1.aspx has a TextBox control called TextBox1 and you transferred to WebForm2.aspx with the preserveForm parameter set to True, you'd be able to retrieve the value of the original page TextBox control by referencing Request.Form("TextBox1").

如上所述，有许多不同之处。除此之外，还有一个不同。Response.Redirect()可用于将用户重定向到不属于应用程序的任何页面，但Server.Transfer()只能用于在应用程序内重定向用户。

//This will work.
Response.Redirect("http://www.google.com");

//This will not work.
Server.Transfer("http://www.google.com");

响应。重定向的代价更大，因为它向服务器添加了额外的行程，以确定要去哪里。

服务器。传输是更有效的，但它可能会误导用户，因为Url没有物理改变。

根据我的经验，性能上的差异还没有大到可以使用后一种方法

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

Response.Redirect()会将您发送到一个新页面，更新地址栏并将其添加到浏览器历史记录中。在浏览器上，您可以单击返回。

Server.Transfer()不会更改地址栏。你不能反击。

当我不想让用户看到我要去哪里时，我使用Server.Transfer()。有时在“加载”类型的页面上。

否则，我将总是使用Response.Redirect()。

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