Sql VB.net通过存储过程将参数传递给函数

我试图调用一个填充datatable的函数，但它不起作用，我迷路了。我得到一个函数错误。函数不会在所有代码路径上返回值。这是我的代码，请帮忙，谢谢

Protected Sub Search_Click(sender As Object, e As EventArgs) Handles Search.Click
        strPartNumber = txtPartNumber.Text

            Dim CT As DataTable = Me.GetCompanyInfo(strPartNumber, "None")
            dvCommon.DataSource = CT
            dvCommon.DataBind()
    End Sub

Private Function GetCompanyInfo(ByRef PartNumber As String, ByRef Version As String) As DataTable
        Dim constr As String = ConfigurationManager.ConnectionStrings("DefaultConnection").ConnectionString
        Using con As New SqlConnection(constr)
            Using cmd As New SqlCommand("spCommonInfo")
                cmd.Connection = con
                cmd.CommandType = CommandType.StoredProcedure
                cmd.Parameters.AddWithValue("@PartNumber", PartNumber)
                cmd.Parameters.AddWithValue("@Version", Version)
                Using sda As New SqlDataAdapter(cmd)
                    Dim CT As New DataTable()
                    sda.Fill(CT)
                End Using
            End Using
        End Using
    End Function

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据我所知，您的方法

GetCompanyInfo

将数据表返回为

As datatable

，但在代码中不返回数据表

您应该返回已填充的数据表

Return CT

您的函数代码应该是

Private Function GetCompanyInfo(ByRef PartNumber As String, ByRef Version As String) As DataTable
        Dim constr As String = ConfigurationManager.ConnectionStrings("DefaultConnection").ConnectionString
        Using con As New SqlConnection(constr)
        Dim CT As New DataTable()
            Using cmd As New SqlCommand("spCommonInfo")
                cmd.Connection = con
                cmd.CommandType = CommandType.StoredProcedure
                cmd.Parameters.AddWithValue("@PartNumber", PartNumber)
                cmd.Parameters.AddWithValue("@Version", Version)
                Using sda As New SqlDataAdapter(cmd)                    
                    sda.Fill(CT)
                End Using
            End Using
        End Using
     Return CT
    End Function

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我收到一个函数错误。

你要对这个错误保密吗？你的CT不会被退回。它刚被填满，然后就死了。@LarsTech请告诉我如何返回它。您需要在函数的底部

return CT

。使用con…行将

尺寸CT作为新数据表移动到
上方。