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SqlDataSource UpdateCommand using 2 tables

Posted By:      Posted Date: August 21, 2010    Points: 0   Category :ASP.Net

I have two tables

Trans  with fields TransID, Date, CustomerID and some other stuff

Customer with fields CustomerID, Name, TaxId

On the screen the user only sees the fields Date and Customer Name. CustomerID is behind the scenes only.


I'm using SqlDataSource. Having no problems with SelectCommand. I don't know how to construct the UpdateCommand and InsertCommand.

Let's say the user changes the date, then I need to do an UPDATE.

UPDATE Trans SET Date = @Date, CustomerID = @CustomerID results in an error message and the record is not updated.

I get an error on the page that says "Sys.WebForms.PageRequestManagerServerErrorException: Input string was not in correct format".


I tried taking out the set for CustomerID and I still get the error on page.


Also, for inserting, the users will see a dropdownlist with Customer Names. I need to convert that to a CustomerID to be used in the new record being inserted in the database. I'm not sure how to do this.


Do I need to do something with Control Parameters?

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