Answer 1

Answer 2

使用knslyr的回复发布完整的代码段，但在原始代码的上下文中，仅针对子孙后代：

Try
    ' Search (case insensitive) for the first occurrence of the given string
    Dim foundCell As DataGridViewCell = (
        From row As DataGridViewRow In dgvMembers.Rows,
        cell As DataGridViewCell In row.Cells
        Where cell.Value.ToString.ToUpper.Contains(searchText)
        Select cell
    ).First

    ' If we have a match, select it
    If foundCell IsNot Nothing Then
        ' Select the cell if we have a match
        dgvMembers.CurrentCell = foundCell
        WriteMessage("String '{0}' found.", searchText)
    Else
        ' No cell found.  Whoops.
        WriteMessage("String '{0}' NOT found.", searchText)
    End If
Catch ex As Exception
    ' An exception probably means the New row was reached.  So, no dice.
    WriteMessage("String '{0}' NOT found.", searchText)
End Try