vb.net DataGridView在按钮中把指定的字符替换到指定列的任意求余数单元格的字符串中,每行代码注释

以下是代码注释的每行解释：

Private Sub ReplaceCharInColumnButton_Click(sender As Object, e As EventArgs) Handles ReplaceCharInColumnButton.Click
    '要替换的字符
    Dim replaceChar As String = "X" 

    '要替换的列的索引
    Dim columnToReplace As Integer = 2 

    '求余数的数值
    Dim modulus As Integer = 5 

    '遍历DataGridView的每一行
    For Each row As DataGridViewRow In DataGridView1.Rows

        '获取指定列的单元格的值
        Dim cellValue As String = row.Cells(columnToReplace).Value.ToString()

        '如果单元格的值不为空
        If Not String.IsNullOrEmpty(cellValue) Then

            '将单元格的值转换为字符数组
            Dim cellValueArray As Char() = cellValue.ToCharArray()

            '遍历字符数组
            For i As Integer = 0 To cellValueArray.Length - 1

                '查找要替换的字符
                If cellValueArray(i) Mod modulus = 0 Then

                    '将该字符替换为指定的替换字符
                    cellValueArray(i) = replaceChar.ToCharArray()(0)
                End If
            Next

            '将修改后的值设置回单元格
            row.Cells(columnToReplace).Value = New String(cellValueArray)
        End If
    Next
End Sub

希望这些注释能够帮助您更好地理解代码。