從Datagridview查找公共值

Question

我有大約10（DatagridView計數可能會根據用戶從2到10選定的文件而不同）Datagridview，那麼我如何從所有Datagridviews中找到共同的價值？

評論如果您需要更多的簡短詳情

下面是我的，但它找到共同從2個-2 datagridviews

For i As Integer = 1 To dgvCont 
     For j As Integer = 0 To Main.DGVM(i).Rows.Count - 1 
      For Each Val As DataGridViewRow In Main.DGVM(i + 1).Rows 
       If Val.Cells(0).Value = Main.DGVM(i).Rows.Item(j).Cells(0).Value Then 
        Dim cm As String = Val.Cells(0).Value 
        If cm = "" Then 

        Else 
         Analysis.lvCmn.Items.Add(Val.Cells(0).Value) 
        End If 
       End If 
      Next 
     Next 
    Next 

Answer 1

我知道你要設置兩個嵌套循環占人數不詳元素（項的DataGridView一個數組，我相信），執行您想要的檢查：

For count1 As Integer = 1 To dgvCont 'Assuming indices from 1 to dgvCont 

    For row1 As Integer = 0 To Main.DGVM(count1).Rows.Count - 1 
     If (Main.DGVM(count1).Rows(row1).Cells(0).Value Is Nothing) Then Continue For 

     Dim val1 As String = Main.DGVM(count1).Rows(row1).Cells(0).Value 
     Dim found As Boolean = False 
     For count2 As Integer = 1 To dgvCont 'Assuming indices from 1 to dgvCont 
      If (count2 = count1) Then Continue For 

      For row2 As Integer = 0 To Main.DGVM(count2).Rows.Count - 1 
       If (Main.DGVM(count2).Rows(row2).Cells(0).Value Is Nothing) Then Continue For 

       Dim val2 As String = Main.DGVM(count2).Rows(row2).Cells(0).Value.ToString() 
       If val1 = val2 Then 
        Dim cm As String = val1 
        If cm = "" Then 

        Else 
         Analysis.lvCmn.Items.Add(val1) 
        End If 

        found = True 
        Exit For 'By assuming that you want to stop searching after finding a match 
       End If 

      Next 

      If (found) Then Exit For 'By assuming that you want to stop searching after finding a match 
     Next 
    Next 
Next 

你的代碼是不是太清楚（既不w ^你想要的帽子）;但是這應該給你一個足夠好的開始來執行你正在尋找的實現。請記住，這個代碼（像你的）只考慮一列（第一個）;如果要遍歷所有列，則必須添加進一步的嵌套循環。