數據綁定組合框在VB.Net

Question

我試圖綁定CheckedListbox的Cheched項目的ComboBox我的代碼如下

Private Sub chklColumns_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chklColumns.SelectedIndexChanged   
      cmbSort.DataSource = chklColumns.CheckedItems 
End Sub 

給出每當我檢查它加載一個項目到ComboBox項目第一次，但是當我選擇第二個項目，我仍然有單個項目在組合... 我在我的上面的代碼中anythig錯誤？

Answer 1

你應該重新設置一個新值之前設置DataSource到Nothing綁定：

Private Sub chklColumns_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chklColumns.SelectedIndexChanged   
    cmbSort.DataSource = Nothing 
    cmbSort.DataSource = chklColumns.CheckedItems 
End Sub