檢查標籤上的文本是否存在於datagridview中

Question

有人可以幫我解決這個問題嗎？

我將一個標籤的文本添加到datagridview中。但在我插入之前，我想檢查文本是否不存在於datagridview中。我是堆棧。需要幫忙。

在此先感謝。

Answer 1

你可以只通過DataGridView的行和細胞循環和比較字符串，是這樣的：

Private Sub AddLabelToDGV(ByVal dgv As DataGridView, ByVal labelText As String) 
    Dim found As Boolean = False 
    For Each row As DataGridViewRow In dgv.Rows 
     For Each cell As DataGridViewCell In row.Cells 
      If cell.Value IsNot Nothing AndAlso cell.Value.ToString().Equals(labelText) Then 
       found = True ' if this is found it might be worth exiting the loop now instead of continuing 
      End If 
     Next 
    Next 
    If Not found Then 
     Dim row As New DataGridViewRow 
     row.CreateCells(dgv) 
     row.Cells(0).Value = labelText 
     dgv.Rows.Add(row) 
    End If 
End Sub