Forms Data Controls :: Detailsview Dropdownlist And Label - Integer Not Valid?

Jan 31, 2011

i am using visual studio 2008 vb. i have a dropdownlist in my detailsview populated with product id. when i select an id, the product name will appear on a label. however, when i change the product id in the dropdownlist, an error occur "Conversion from string "ProductName" to type 'Integer' is not valid." Here's the code file.

Protected Sub DropDownList1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs)
Dim lbl As Label = DetailsViewOrderDetails.FindControl("Label4")
Dim ddl As DropDownList = DetailsViewOrderDetails.FindControl("DropDownList1")
lbl.Text = ddl.SelectedValue("ProductName").ToString()
End Sub

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[Code].....

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code:

The SqlDataSource used to select the parameters from the table and populate the DetailsView

[Code]....

The code of the fields that hold the DDLs in the DetailsView control

[Code]....

The codebehind:

[Code]....

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