I am working in ASP.Net - Visual Studio 2008 - VB Code
Have a Gridview bound to an AccessDataSource and have configured it to allow Updating
It works correctly and updates columns as long as all grid columns (except Primary Key) are set to ReadOnly=False
Setting one or more columns to ReadOnly=True gives me the error: You tried to assign the Null value to a variable that is not a Variant data type
My guess is that the ReadOnly fields are trying to put Null values into database fields on update.
You will need to adjust the UpdateCommand for your AccessDataSource to exclude the read-only fields. This AccessDataSource has three columns ID, Field1 and Field2. Field1 is read-only, so I have removed
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