ASP.net VB.net CheckBox template field is blank

Hi

I add a Checkbox template field to a GridView using the following code. The cells are blank and don't show any checkboxes.
What have I done wrong?

              Dim oCheckBoxField As New CheckBoxField
                        oCheckBoxField.HeaderText = "Check"
                        oGridView.Columns.Add(oCheckBoxField)

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Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAsked:
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Craig YellickDatabase ArchitectCommented:
Is this checkbox intended to be used for allowing the user to select multiple items in the grid? If so this is quite complicated and there are several detailed walk-throughs available. Here's one that includes selected rows highlighting:

http://www.codeproject.com/Articles/14437/Extending-GridView-by-allowing-Multiple-Selections

Here's a very simple implementation, in two parts:

http://www.niteshluharuka.com/how-to-add-a-checkbox-column-to-gridview-in-aspnet
http://www.niteshluharuka.com/how-to-get-multiple-selected-rows-from-gridview-in-aspnet
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Craig YellickDatabase ArchitectCommented:
Did you set AutoGeneratedColumns=false?  Where is the code you posted located, which event?
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Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:
The code is in the Page_Load event. I did not set AutoGeneratedColumns=false
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Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:
Thanks very much
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