Forms Data Controls :: GridView TemplateField Vanishes On Second Postback With Some Dynamic Content?
Dec 23, 2010
(Example code below)
I have a GridView. It has a 'static' TemplateField (in the .aspx page). I add and remove BoundFields to it depending on user preferences on postback. Affter the second postback, the template field appears empty.
Here is a stripped down mockup of what I'm doing. You can click the "Regular Postback" button as much as you want, and nothing bad happens. But if you click the "Recreate" button once-- it's all ok. Click it again, and the "one" column goes on Christmas break.
So is there something else I should be doing, or is this going to be a "halcyon1234 to code interface" error.
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[Code]....My issue is with the result column that I add in codebehind.
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below is my code
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[Code]....
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Administration.aspx.cs"
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[Code]....
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Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
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[URL]
and...
[URL]
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ASPX:
[Code]....
And here's the Code Behind:
[Code]....
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Object reference not set to an instance of an object.
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Line 28: if (row.RowType == DataControlRowType.DataRow)
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