vb.net - 从子 VB.NET 操作父窗体上的控件

Question

我正在尝试从 FORM 2 向 DataGridView 添加新行，但无法成功，我尝试的代码如下:

表格 2:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        FORM1.invoice_items.Rows.Add()
    End Sub

看起来需要时间但找不到解决方案，有人可以帮助我解决我的问题会很好，谢谢。

Answer 1

试试这个
仅当您使用 showdialog 时才有效。

表格 2 :

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       'Pass the value to be added in the datagrid to form 1
       Me.DialogResult=Windows.Forms.DialogResult.OK

End Sub

表格一:

  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
      If Form2.ShowDialog = Windows.Forms.DialogResult.OK Then
    'Getthe value from form 2
    invoice_items.Rows.Add()
    End If
End Sub