StackOverflow2013

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primarykey
Id
14642468
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0
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2013-02-01T08:42:17.267
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2013-02-01T09:01:07.623
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2017-05-23T10:30:53.317
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2
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2
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text
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If You're getting the post back control id correctly but <code>FindControl</code> returns nothing, then it's probably because You're using a master page. Basically, <code>someControl.FindControl(id)</code> searches through controls that are in <code>someControl.NamingContainer</code> naming container. But in Your case, the <code>Button1</code> control is in the <code>ContentPlaceHolder1</code>, which is a naming container, and not directly in the <code>Page</code> naming container, so You won't find it by invoking <code>Page.FindControl</code>. If You can't predict in which naming container the control You're looking for is going to be (e.g. post back can be caused by two different buttons from two different content placeholders), then You can write an extension that'll search for a control recursively, like so: <pre><code>public static class Extensions { public static Control FindControlRecursively(this Control control, string id) { if (control.ID == id) return control; Control result = default(Control); foreach (Control child in control.Controls) { result = child.FindControlRecursively(id); if (result != default(Control)) break; } return result; } } </code></pre> Use it with caution though, because this method will return the first control that it finds with the specified id (and You can have multiple controls with the same id - but they should be in different naming containers; naming containers are meant to differentiate between controls with same ids, just as namespaces are meant to differentiate between classes with same names). Alternatively, You could try to use <code>FindControl(string id, int pathOffset)</code> overload, but I think it's pretty tricky. Also, check <a href="https://stackoverflow.com/questions/12579311/how-to-use-postbackurl-in-pages-with-masterpage">this question</a> out.
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1. POHow to check whether postback caused by a Dynamic link button
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1. USCommunity
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1. USGrx70
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