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When you use Server.Transfer then the previous page also exists in server memory while in the Response.Redirect method the previous page is removed from server memory and loads a new page in memory. You cannot use Server.Transfer to redirect the user to a page running on a different server. Server.Transfer can be used only on sites running on the same server. Response.Redirect can be used to redirect a user to an external websites.
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aspx pages and is specific to ASP and ASP.NET. aspx and HTML pages whereas Server.Transfer can be used only for. That means the address bar URL will be changed in the Response.Redirect method and also updates the browser history so you can move back from the browser back button.įigure 1.4 Server.Transfer method request and response
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For example, see Figure 1.3 shows you get the same page as the previous request page so the previous page still remains while in Response.Redirect you get a different page in the response (see Figure 1.1 ). That means your web page URL in the address bar will not be changed. You get the same page response but different content. Now Figure 1.3 explains that the first request goes to the web server and then gets a response so the round-trip is not made by the Server.Transfer method. Server.Tarnsfer sends a request directly to the web server and the web server delivers the response to the browser.įigure 1.3 Request and Response using Server.Transfer method Let's see that in Figure 1.2.įigure 1.2 Round Trip by Response.Redirect method. The Response.Redirect method first sends a request to the web browser so it is the "HTTP 302 Found" status, then the browser sends a request to the server and the server deliver a response so it is "HTTP 200 OK". Then you click on the button that redirects to another page using the Response.Redirect method.
#Sap redirect url is null code#
You can notice in Figure 1.1 that when you run the application then you get a web page successfully so the HTTP status code is "HTTP 200 OK".
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For example, suppose you are on the web page "UserRegister.aspx" page and it has a button that redirects you to the "UserDetail.aspx" web page.įigure 1.1 Request and Response using Response.Redirect method Response.Redirect sends an HTTP request to the browser, then the browser sends that request to the web server, then the web server delivers a response to the web browser. The 302 status code indicates that the resource you are requesting has redirected to another resource. The HTTP response status code 302 Found is a common way of performing a redirection. In a POST request the response will contain an entity describing or containing the result of the action. In a GET request, the response will contain an entity corresponding to the requested resource. The information returned with the response is dependent on the method used in the request. It indicates that the request was successful and the server was able to deliver on the request. This is the most common HTTP status message. The HTTP status codes are the codes that the Web server uses to communicate with the Web browser or user agent. Before touching on more points I want to explain some HTTP status codes, these are important for the understanding of the basic differences between these two.