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I've just created a new webpart. I'm a beginning on Sp Word. I built a new WP the get some data from textBox and put it into a content list. But every time I do Refresh a new void item is inserted into the list. How can I control this post back?

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This is not a SharePoint problem, but a general Web programming problem. The answers to this article on stackoverflow has a couple of solutions: Page Refresh Causes Duplicate POST in ASP.NET Applications

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