[VB.NET]將集合類別繫結至DataGridView並使其具備新增功能

2010-05-10

10175
0
VB.NET

若直接把集合類別繫結至DataGridView。

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim lst As New List(Of Person)
        lst.Add(New Person With {.Name = "Larry"})
        DataGridView1.DataSource = lst
    End Sub

End Class

Class Person
    Dim _name As String
    Property Name() As String
        Get
            Return _name
        End Get
        Set(ByVal value As String)
            _name = value
        End Set
    End Property
End Class

就算DataGridView有設定AllowUserToAddRows，DataGridView也是無法做新增的動作。

要解決這樣的問題，可以把集合類別設至BindingSource，把AllowNew屬性設起來，再把BindingSource給繫到DataGridView就可以了。

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Dim lst As New List(Of Person)
        lst.Add(New Person With {.Name = "Larry"})
        Dim binding As New BindingSource
        binding.DataSource = lst
        binding.AllowNew = True
        DataGridView1.DataSource = Binding
    End Sub

End Class

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