.net - 得到错误无效参数=“0”的值对于 SelectedIndex 参数名称无效：Selectedindex

Question

如果我的，我如何过滤我的组合框显示Label.text ="ad"，我只想显示那些在数据库中有“广告”并且不应该全部显示的人。但是错误无效参数 = '0' 的值对于 SelectedIndex' 参数名称无效：Selectedindex “出现”。

Private Sub FillCombo()
   Try
       conn = New OleDbConnection(Get_Constring)

       Dim sSQL As String = ("SELECT subject FROM student where subject like'" & Label25.Text & "%' ")
       Dim da As New OleDbDataAdapter(sSQL, conn)

       Dim ds As New DataSet
       da.Fill(ds)

       cmbsection.ValueMember = "subject"
       cmbsection.DataSource = ds.Tables(0)
       cmbsection.SelectedIndex = 0

   Catch ex As Exception
       MsgBox("ERROR : " & ex.Message.ToString)
   End Try
End Sub

Answer 1

Dim sSQL As String = ("SELECT subject FROM student where **username** like'" & Label25.Text & "%' ")

solved :)