組合框顯示system.data.datarowview vb.NET

Question

當我想選擇一個酒店名稱我想每家酒店的名字與房號分配給它具有

sqlCmd1 = "Select ROID from Room" 
     ad = New OleDb.OleDbDataAdapter(sqlCmd1, cnn) 
     ds = New DataSet 
     ad.Fill(ds, "Room") 
     For Each row As DataRow In ds.Tables(0).Rows 
      roomCB.Items.Add(row.Item(0)) 
     Next 

這是爲酒店組合框

Private Sub hotelCB_SelectedIndexChanged(sender As Object, e As EventArgs) 
              Handles hotelCB.SelectedIndexChanged  
     If (hotelCB.SelectedIndex = 0) Then 
      sqlCmd1 = "Select ROID from Room" 
      ad = New OleDb.OleDbDataAdapter(sqlCmd1, cnn) 
      ds = New DataSet 
      ad.Fill(ds, "Room ID") 
      roomCB.DataSource = ds.Tables(0).DefaultView 
     ElseIf (hotelCB.SelectedIndex = 1) Then 
      sqlCmd1 = "Select ROID from Room where HotelID=" + 
               hotelCB.SelectedIndex.ToString() 
      ad = New OleDb.OleDbDataAdapter(sqlCmd1, cnn) 
      ds = New DataSet 
      ad.Fill(ds, "Room ID") 
      roomCB.DataSource = ds.Tables(0).DefaultView 
     End If 
    End Sub 

Answer 1

你必須在DisplayMember specifiy：

roomCB.DisplayMember = "ROID"; 
roomCB.ValueMember = "ROID"; 
roomCB.DataSource = ds.Tables(0) 

Answer 2

更改您的組合框負荷邏輯

sqlCmd1 = "Select ROID from Room" 
    ad = New OleDb.OleDbDataAdapter(sqlCmd1, cnn) 
    ds = New DataSet 
    dt = New DataTable 
    ad.Fill(ds, "Room") 
    dt=ds.Tables(0) 
    For i as integer=0 to dt.Rows.Count - 1 
     roomCB.Items.Add(dt.Rows(i).Item(0)) 
    Next