Question

我有一个 wpf 应用程序, 它有组合框和多个文本框。

On the window load event the combo box is filled with the Employee IDs. When I select any ID then the below text boxes should display the name, city, zip, country of the selected "Id". I did wrote the below code for filling in the values in text boxes. Private Sub dataview1(ByVal GUID As String) Try

        Dim viewDs As New DataSet()
        Dim Query As String
        Query = "Select * from tblEmployeeInfo Where ID =  " & GUID.Trim & " "
        viewDs = GetData(Query, True)

        Dim dv As DataView = New DataView(viewDs.Tables(0))
        Dim Notify As String = String.Empty
        If dv.Count > 0 Then

            If Not IsDBNull(dv(0)("ID")) Then
                txtGUID.Text = dv(0)("ID")
            Else
                txtGUID.Text = String.Empty
            End If

           If Not IsDBNull(dv(0)("StreetName"))     Then
                txtStName.Text = dv(0)("StreetName")
            Else
                txtStName.Text = String.Empty
            End If
        End If
    Catch ex As Exception
        MsgBox("No Values Found")
    End Try
End Sub

以上称为“Combo Box选择变更事件”的以下功能:

Private Sub ID CB_SelectionChanged(sender As System.Object, e As System.Windows.Controls.SelectionChangedEventArgs) Handles IDCB.SelectionChanged
    StreetCB.IsEnabled = False
   DataView1(IDCB.SelectedItem)

虽然它点击了 ViewMode 函数, 但从不在我的文字框中输入任何值。

里面有什么我漏掉的吗?

有什么办法我能实现吗?

任何帮助都会感激不尽

太谢谢你了!

Answer 1

虽然它点击了 ViewMode 函数, 但从不在我的文字框中输入任何值。

请在调试器中跳过这个步。如果您的查询没有返回结果, 这可能会发生, 我怀疑, 也就是本案中的问题。

友情链接