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extra request to a default page on a callback

Posted By:      Posted Date: September 25, 2010    Points: 0   Category :ASP.Net

Hello guys,

I have a following issue on production server (the development environment is free of it) And it's only happening in Internet Explorer.

I add callback to a page in the old-fashioned way -> Page.ClientScript.RegisterClientScriptBlock(...)

The scenario is:

1) The default page is being loaded. On Page_OnLoad it assigns a NULL to some session key. Let's call it Control -> Session["Control"] = null;

2) User presses a button and gets redirected to a next page (let's call it NextPage.aspx) using javascript event -> window.location.assign(....) (also tried .href = ... - no help)

3) The NextPage.aspx assigns some value to Session["Control"] on Page_OnLoad

5) User clicks a button on the NextPage.aspx and a callback request is being sent to a server....

TA DA!!! The interesting part:

6) Along with the request to the NextPage.aspx another request is being sent to the default page.

7) The only response is being recieved by a client is a response from the NextPage.aspx BUT since the code on the default page is being executed it puts null to the Session["Control"] which screws all my following scenario. the default page doesn't recognize the request as a callback? so if(IsCallback) {} doesn't he

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