是否可以自定义DataBound ComboBox的DisplayMember？

Question

解决方案

这就是我提出的：

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

操纵：

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！

---

我有一个从DataTable填充的ComboBox：

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

我希望能够让DisplayMember显示“key_code - descript”，同时保留我设置的值。

这甚至可能吗？感谢

Answer 1

由于您使用的是数据表，因此需要创建一个计算值的新列。

我个人已经开始使用对象来进行数据绑定，并且在我的课程中使用它我只需添加另一个公共属性“ListDisplayText”来为我做格式化。