can someone explain why databinding to textbox2 works but not for textbox1?
Using a BindingSource as Datasource, but using the query directly does also not work.
Private Class DTO1
Public Property id As Integer
Public Property value As Nullable(Of Integer)
Public Property value2 As String
End Class
Private Sub Button4_Click(sender As System.Object, e As System.EventArgs) Handles Button4.Click
Dim lst As New List(Of DTO1)
Dim a As New DTO1
a.id = 1
Dim o As Object = 1
a.value = o
lst.Add(a)
a = New DTO1
a.id = 2
a.value = Nothing
lst.Add(a)
bs.DataSource = (From p In lst Select p).ToList
grd.DataSource = bs
TextBox1.DataBindings.Add("text", grd.DataSource, "value")
TextBox2.DataBindings.Add("text", grd.DataSource, "value2")
End Sub
every time i move out from textbox1 the initial value is displayed againe. _tia rene
edit: got this working. when using nullable values you have to pass in some more parameters ...
Me.DataBindings.Add(pr_PropertyName, pr_Datasource, pr_Datamember, True, DataSourceUpdateMode.OnValidation, Nothing)
did the trick
只是为了回答这个问题...
.DataBindings.Add(pr_PropertyName, pr_Datasource, pr_Datamember, True, DataSourceUpdateMode.OnValidation, Nothing)
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