You tried to assign the Null value to a variable that is not a Variant data type !


venom361
HOME ยป ASP & ASP.net

For small applications it is proper to use AccessDataSource object in order to access the database directly from asp.net page. When i first used it for inserting data with formview, it generated the following error :
"You tried to assign the Null value to a variable that is not a Variant data type"
today i tried the same thing again and it generated the same error again.
I found out that in the generated mark up, although id field is of type autonumber and primary key, visual studio generates a parameter for that field in the markup of the aspx page. I deleted those parameters from the insert command of AccessDataSource and FormViews Insert and Edit Item templates. Then


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