Vb.net 使用文本框中的值在datagrid中搜索

如何在msgbox中显示值。在datagrid的第一列中，我根据textbox查找值，我希望显示第二列和msgbox中同一行的值。现在我只找到了一件东西

您可以直接通过枚举List2DataGridView.行。对于每个行，无需使用索引来访问它们

For Each row As DataGridViewRow In List2DataGridView.Rows

然后，我们测试每一行的值，当我们找到匹配的行时，我们显示一条包含其值的消息。我们可以访问该值，因为它在范围内。当我们找到匹配的元素时，我们退出For Each

然而，这不是最优雅的解决方案，可读性差。具体地说，使用Exit For有点难看，并且使代码更难在同一个地方找到

我们可以通过使用LINQ做得更好

Dim Matches = From row As DataGridViewRow In List2DataGridView.rows
              Let CellValue = row.Cells.Item(1).Value
              Where CellValue = TextBox2.Text
              Select New With {CellValue, row.Index}

Dim Match = Matches.FirstOrDefault()

If Match IsNot Nothing Then
    MsgBox("Item is found in row: " & Match.Index)
    MsgBox("Value of second column in this row: " & Match.CellValue)
End If

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当您回答有关stackoverflow的任何问题时，请解释。@manu我编辑此内容是为了解释代码，并提供更可读的版本，但不确定它是否回答了问题，因为我发现问题的意图不清楚

For Each row As DataGridViewRow In List2DataGridView.Rows

For Each row As DataGridViewRow In List2DataGridView.Rows
    If row.Cells.Item(1).Value = TextBox2.Text Then
        MsgBox("Item is found in row: " & row.Index)
        MsgBox("Value of second column in this row: " & row.Cells.Item(1).Value)
        Exit For
    End If
Next
MsgBox("Item not found")

Dim Matches = From row As DataGridViewRow In List2DataGridView.rows
              Let CellValue = row.Cells.Item(1).Value
              Where CellValue = TextBox2.Text
              Select New With {CellValue, row.Index}

Dim Match = Matches.FirstOrDefault()

If Match IsNot Nothing Then
    MsgBox("Item is found in row: " & Match.Index)
    MsgBox("Value of second column in this row: " & Match.CellValue)
End If