是否可以自定义DataBound组合框的DisplayMember？

Question

解决方案

这是我想出了：

Public Class IndexedDropDownItem 
    Private _KeyCode, _Display As String 
    Public Property KeyCode() As String 
     Get 
      Return _KeyCode 
     End Get 
     Set(ByVal value As String) 
      _KeyCode = value 
     End Set 
    End Property 
    Public Property Display() As String 
     Get 
      Return _Display 
     End Get 
     Set(ByVal value As String) 
      _Display = value 
     End Set 
    End Property 
    Sub New(ByVal KeyIndex As String, ByVal ItemDisplay As String) 
     KeyCode = KeyIndex 
     Display = ItemDisplay 
    End Sub 
    Public Overrides Function ToString() As String 
     Return String.Format("{0} - {1}", KeyCode, Display) 
    End Function 
End Class 

实现：

With myDropDown 
    Dim oItem As IndexedDropDownItem = Nothing 
    For Each dr As Data.DataRow In oTemp.Rows 
     oItem = New IndexedDropDownItem(dr.Item("key_code"), _ 
             dr.Item("descript")) 
     .Items.Add(oItem) 
     oItem = Nothing 
    Next 
End With 

手法：

Dim _KeyCode, _Display As String 
With CType(dataPathComboBox.SelectedItem, IndexedDropDownItem) 
    _KeyCode = .KeyCode 
    _Display = .Display 
End With 

我希望这会帮助别人！

---

我是从一个DataTable填充的组合框：

With myComboBox 
    .DataSource = myDataTable 
    .DisplayMember = "descript" 
    .ValueMember = "key_code" 
End With 

我希望能够有将DisplayMember秀“key_code - DESCRIPT”，同时保留我已设置的值。

这甚至可能吗？由于

Answer 1

由于您使用的是数据表，你需要创建一个计算值的新列。

我个人已经转移到使用对象做我的数据绑定和它在我的课，我只是添加其他公共财产“ListDisplayText”，做格式化我。