vb.net-数据绑定组合框不允许将选项卡移开 [英] vb.net - data bound combobox not allowing tab away

问题描述

我有一个ComboBox，它是绑定到对象属性的数据. ComboBox包含我生成的Enum值和描述的列表，如下所示:

I have a ComboBox that is data bound to a property of an object. The ComboBox contains a list of Enum values and descriptions which I have generated as follows:

Public Class Enumeration

#Region "Enumeration handling mothods"

    Public Shared Function GetList(ByVal Enumerator As Type) As Enumeration.List
        Dim items As New Enumeration.List
        Dim values() As Integer = System.Enum.GetValues(Enumerator)
        For Each enumItemId As Integer In values
            Dim enumItem As New Item(enumItemId, System.Enum.GetName(Enumerator, enumItemId))
            items.Add(enumItem)
        Next
        Return items
    End Function

    Public Class Item
        Private _iId As Integer
        Public ReadOnly Property Id() As Integer
            Get
                Return _iId
            End Get
        End Property

        Private _sDescription As String
        Public ReadOnly Property Description() As String
            Get
                Return _sDescription
            End Get
        End Property

        Public Sub New(ByVal EnumId As Integer, ByVal EnumDescription As String)
            _iId = EnumId
            _sDescription = EnumDescription
        End Sub

    End Class

    Public Class List
        Inherits List(Of Enumeration.Item)

        Default Public Shadows Property Item(ByVal index As Integer) As Item
            Get
                Return MyBase.Item(index)
            End Get
            Set(ByVal value As Item)
                MyBase.Item(index) = value
            End Set
        End Property

        Public Sub New()
            MyBase.New()
        End Sub

        Public Shadows Sub Add(ByVal EnumItem As Item)
            MyBase.Add(EnumItem)
        End Sub

    End Class

#End Region

End Class

和我的枚举定义如下

and my Enum is defined as follows

Public Enum Statuses
        Unspecified = 0
        Active = 1
        OutOfService = 10
        Sold = 50
        Scrapped = 99
    End Enum

ComboBox绑定的

The

SelectedValue

属性发送到myOject.Status属性

在表单加载"事件中

property of the ComboBox binding is sent to the myOject.Status property

In the Form Load event

myBindingSource.DataSource = _oMyObject

statusComboBox.DataSource = Enumeration.GetList(GetType(MyObject.Statuses))

我可以选择任何雕像，但不会让我离开组合框.如果删除绑定，则comboBox会按预期运行，除非对象属性值未更新.

任何帮助，不胜感激.

谢谢

I can select any of the statues, but it will not let me leave the ComboBox. If I remove the binding then the comboBox operates as expected, except then the object property value is not updated.

Any help greatly appreciated.

Thanks

推荐答案

您是否为组合框或绑定源处理了任何事件?

例如，如果您已经处理了组合的Validating事件，并且Cancel设置为true，那么只有输入有效的内容，您才能进入下一个控件.

Do you have any events handled for the combo box or the binding source?

For example if you would have handled the Validating event for the combo and the Cancel is set to true then you wouldn''t be able to get to the next control until you have a valid entry.

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