如何通过CheckBox在DataGridView中全选？？？？？

[billlyh]

windows(c/s)程序，
已经在DataGridView中实现CheckBox列,
是通过属性窗口选择Columns属性，..........
在"类型"下拉列表中选择"DataGridViewCheckBoxColumn"得到的

我试着用以下程序，
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
For Each dr As DataGridViewRow In Me.DataGridView2.Rows
Dim cbx As DataGridViewCheckBoxCell = DirectCast(dr.Cells(0), DataGridViewCheckBoxCell)
cbx.Selected = True
Next
End Sub
却实现 不了，哪位帮我看看？？？？？？？？

[qshurufa]

If btnSelectAll.Text = "全选(&A)" Then
For i As Integer = 0 To dgvOrderList.RowCount - 1
dgvOrderList.EndEdit()
dgvOrderList.Rows(i).Cells("dcChoose").Value = True
Next
btnSelectAll.Text = "反选(&C)"
Else
For i As Integer = 0 To dgvOrderList.RowCount - 1
dgvOrderList.EndEdit()
dgvOrderList.Rows(i).Cells("dcChoose").Value = False
Next
btnSelectAll.Text = "全选(&A)"
End If

[ouzui]

[Quote=引用 1 楼 qshurufa 的回复:]
If btnSelectAll.Text = "全选(&A)" Then
For i As Integer = 0 To dgvOrderList.RowCount - 1
dgvOrderList.EndEdit()
dgvOrderList.Rows(i).Cells("dcChoose").Value = True
Next
btnSelectAll.T……
[/Quote]
路过学习。。。