即时窗口老是出现这个错误 求大家帮帮忙！System.Windows.Data Error: 35 : BindingExpression path error

Question

System.Windows.Data Error: 35 : BindingExpression path error: 'FactoryEMail' property not found on 'object' ''DataRowView' (HashCode=15584387)'. BindingExpression:Path=FactoryEMail; DataItem='DataRowView' (HashCode=15584387); target element is 'TextBlock' (Name=''); target property is 'Text' (type 'String')

其他字段都一样 但不会出现这个问题
部分代码如下：
        Dim i As Integer
        Dim g As New GridView
        Dim gc As GridViewColumn
        Dim gcc As GridViewColumnHeader
        If _LastIndex = -1 Then
            Return "No Child Found"
        End If
       
        g.AllowsColumnReorder = True
        Populate = ""
        CascadeInId = 0
        AddHandler SelectionChanged, AddressOf _RowClickHandler
        AddHandler ContextMenuOpening, AddressOf ContextMenuOpeningHandler
        Try

            _dtable = _data.Tables(0)
            ItemsSource = _dtable.DefaultView
        Catch ex As Exception

        End Try
        For i = 0 To _LastIndex
            If Not _bcInfo(i).gc Is Nothing Then
                g.Columns.Remove(_bcInfo(i).gc)
            End If
            If ((_bcInfo(i).Flag And eBrowseFlag.NotVisible) = 0) And (_bcInfo(i).FieldName.Length > 0) Then
                gc = New GridViewColumn
                gc.DisplayMemberBinding = New Binding(_bcInfo(i).FieldName)
                gc.Width = 100
                gcc = New GridViewColumnHeader
                gcc.Content = _bcInfo(i).Caption
                gc.Header = gcc
                AddHandler gcc.Click, AddressOf _HeaderClickHandler
                g.Columns.Add(gc)
                _bcInfo(i).gc = gc

            ElseIf ((_bcInfo(i).Flag And eBrowseFlag.CascadeIn) <> 0 Or (_bcInfo(i).Flag And eBrowseFlag.CascadeOut) <> 0) Then
                ' [TODO]
                'Does it need a column to contain cascade data, which should not be visible to user

                gc = New GridViewColumn
                gc.Header = _bcInfo(i).Caption
                gc.DisplayMemberBinding = New Binding(_bcInfo(i).FieldName)
                gc.Width = 100
                g.Columns.Add(gc)
                gc.Width = 0
                _bcInfo(i).gc = gc
            End If
        Next
        View = g

Answer 1

您好，

你可以把一个简化的测试工程发我邮箱吗？我来看看。我的邮箱：[e-mail]  或是用MSN联系：[e-mail]

谢谢。

---

Jim Zhou -MSFT

Answer 2

这个错误没有关系的，错误是说明你的代码里面Binding的Path没有设置正确，就是说Path里面指定的路径（或者简单来说就是属性啦），在你的DataContext里面找不到。WPF将这个信息在调试器里面输出出来，只是提醒你注意，不会影响代码的稳定性的。

Answer 3

 

你好，

Killmyday提供了一个很好的贴子。 一般WPF出现binding错误的时候不会抛出异常，而是把错误信息显示在output窗口，你可以再检查一下你的bind数据源. 你当前错误信息显示''DataRowView' 中找不到'FactoryEMail' 属性.

 

谢谢。

---

Jim Zhou -MSFT