Updating Problem

[tjherman]

I've got two dropdowns which are unbound and which I bind the values of when I update or insert. My method works on all of my other pages, but for some reason is not working on this page. When I try to update the record (it's in a formview), I get an IE message saying "Object must implement IConvertible."

I have the following code in the formview_ItemUpdating event:
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Dim strCompanyName As String = CType(FormView1.Row.FindControl("dropdownlist1"), DropDownList).SelectedValue
Dim strCN As DropDownList = CType(FormView1.Row.FindControl("DropDownList2"), DropDownList)

e.NewValues("CompanyName") = strCompanyName
e.NewValues("ComponentNumber") = strCN
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Can anyone help me with this?