vb.net中的Datagridview RowValidation

Question

你能幫我解決這個問題嗎？ 我希望對添加項目進行行驗證。 我有一個名為datagridview1的datagridview ，其列為dgvTxtItemCode，dgvTxtItemDesc等。 我想添加一個驗證，其中每當輸入相同的項目代碼或項目desc時，將出現一個消息框，表示它已經添加。

所以這是我的代碼，

 Function isAlreadyAdded(itemCode As String, itemName As String) As Boolean
    Dim bFLAG As Boolean
    For Each r As DataGridViewRow In DataGridView1.Rows
        If r.Cells(0).Value = r.Index = itemCode AndAlso r.Index = itemName Then
            bFLAG = True
            Exit For
        End If
    Next
    Return bFLAG
End Function



  Private Sub AddDelivery_RowValidating(sender As Object, e As DataGridViewCellCancelEventArgs) Handles DataGridView1.RowValidating
    With DataGridView1
        If isAlreadyAdded(.Rows(e.RowIndex).Cells(dgvTxtItemDesc.Name).Value, e.RowIndex) Then
            MessageBox.Show("Item was already added!", "Duplicate", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            e.Cancel = True
            Exit Sub
        End If
    End With
End Sub

這是我的頂點，所以我真的需要你的幫助。 感謝大伙們。

Answer 1

嘗試處理cellvalidating事件而不是rowvalidating。 像這樣：

Private Sub AddDelivery_RowValidating(sender As Object, e As DataGridViewCellValidatingEventArgs) Handles DgOperacionsArticles.CellValidating
    With DataGridView1
        If isAlreadyAdded(.Rows(e.RowIndex).Cells(dgvTxtItemDesc.Name).Value, e.RowIndex)=True Then
            MessageBox.Show("Item was already added!", "Duplicate", MessageBoxButtons.OK, MessageBoxIcon.Warning)
            e.Cancel = True
            Exit Sub
        End If
    End With
End Sub

而且，為了確保這個Works，默認情況下將布爾值定義為False：

Dim bFLAG As Boolean = False

希望這可以幫助！