我不确定我应该在我的 vb.net 项目后面的代码中写什么。我有一个过滤网格视图的中继器。当试图声明标量变量@CompanyID 时,我收到了我在这篇文章的标题中提到的错误。有人能帮我吗?我试图在许多论坛上寻找答案,但我找不到正确的答案。
dsLetters.SelectCommand = "SELECT DISTINCT LEFT(ProductName, 1) AS [Letter]
FROM Product, CompanyLink, Company
WHERE Product.ProductID = CompanyLink.ProductID
AND CompanyLink.CompanyID = Company.CompanyID
AND Company.CompanyID = @CompanyID"
'declaring scalar variable @CompanyID
dsLetters.SelectParameters.Clear()
Dim cp As ControlParameter = New ControlParameter
cp.ControlID = "rptLetters"
cp.DefaultValue = "-1"
cp.Name = "CompanyID"
cp.PropertyName = "SelectedValue"
cp.Type = TypeCode.Decimal
dsLetters.SelectParameters.Add(cp)