使用ContextMenuStip調用DataGridView用戶刪除行

Question

我正面臨使用[ContextMenuStrip]調用事件[dgv_clients_UserDeletingRow]的問題。

它給我的錯誤：

Unable to cast object of type 'System.EventArgs' to type 'System.Windows.Forms.DataGridViewRowCanelEventArgs' 

這裏是我的代碼：

Private Sub dgv_clients_UserDeletingRow(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewRowCancelEventArgs) Handles dgv_clients.UserDeletingRow 
    deleteLine(e) 
End Sub 

    Private Sub toolStripItem1_Click(ByVal sender As Object, ByVal args As EventArgs) Handles toolStripItem1.Click 

    If mouseLocation.RowIndex > 0 Then 
     dgv_clients.Rows(mouseLocation.RowIndex).Selected = True 
     dgv_clients.Rows(mouseLocation.RowIndex).DefaultCellStyle.SelectionBackColor = Color.Gray 
     DeleteToolStripMenuItem_Click(sender, args) 
    End If 

End Sub 
Public Sub DeleteToolStripMenuItem_Click(ByVal Sender As Object, ByVal e As EventArgs) 
    Call deleteLine(e) 
End Sub 

感謝您的所有

Answer 1

問題是你deleteLine方法。

你用兩種不同的類型調用它。在Sub dgv_clients_UserDeletingRow中，您通過e as DataGridViewRowCancelEventArg s，在Sub DeleteToolStripMenuItem_Click中您通過e as EventArgs。如果您沒有爲這兩種類型重載您的deleteLine方法，編譯器將嘗試自動分析錯誤的類型，並且失敗。