How can I redirect the user to the same page he was before when he logs in?

I'm going to add my own user control LoginBox to my MasterPage.

I want to just refresh the page the user is currently on when he logs in to the system开发者_JS百科. How can I accomplish this?

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Store the landing page in a session variable, then when the user logs in use that for where to redirect them.

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Better use this:

Request.UrlReferrer.AbsoluteUri

this will more or less solve your problem.