Vb.net如何在datagrid中的列上查找值

Question

我一直在寻找

我的桌子是：

Passenger | Destination  | Status

23        |  Mars        | PWD

我可以在第 3 列找到 PWD 的值，但我无法在第 1 列乘以它，因为第 3 列的值为 PWD。​​p>

这是我查找 PWD 值的代码：

For a As Integer = 0 To DataGridView1.Rows.Count - 1
    If (DataGridView1.Rows(a).Cells(2).Value IsNot DBNull.Value Or Trim(DataGridView1.Rows(a).Cells(2).Value <> Nothing) AndAlso DataGridView1.Rows(a).Cells(2).Value = "PWD") Then
        PWD = PWD + 1
    End If
Next
Dim pwdcount = (From row As DataGridViewRow In DataGridView1.Rows _
                  Where row.Cells("Status").Value = "PWD" And row.Cells("Status").Value IsNot DBNull.Value _
                  Select row.Cells("Status").Value).Count()
label1.text = "The number of PWD is : " & pwdcount

Answer 1

我认为您可能正在尝试找到一个 LINQ 解决方案，这不是我在下面的建议。但我相信这会满足您的要求...

    Dim pwdcount As Integer

    For Each oRow As DataGridViewRow In DataGridView1.Rows
        Dim oPassengerCell As DataGridViewCell = oRow.Cells("Passenger")
        Dim oStatusCell As DataGridViewCell = oRow.Cells("Status")

        If IsNumeric(oPassengerCell.Value) AndAlso oStatusCell.Value = "PWD" Then
            pwdcount += oPassengerCell.Value
        End If
    Next

    Label1.Text = "The number of PWD is : " & pwdcount