vb.net DataGridView左移和右移进行排序，每行代码带注释

好的，以下是实现DataGridView左移和右移进行排序的VB.NET代码，每行都有注释说明：

Private Sub btnLeft_Click(sender As Object, e As EventArgs) Handles btnLeft.Click
    '获取当前选中的列
    Dim selectedColumn As DataGridViewColumn = dgvData.Columns(dgvData.CurrentCell.ColumnIndex)

    '获取当前选中列的索引
    Dim columnIndex As Integer = selectedColumn.Index

    '如果当前选中列是第一列，则不能左移
    If columnIndex = 0 Then
        Return
    End If

    '将当前选中列的DisplayIndex减1，实现左移
    selectedColumn.DisplayIndex -= 1

    '将左移后的列设置为选中状态
    dgvData.CurrentCell = dgvData.Rows(0).Cells(columnIndex - 1)

    '循环遍历DataGridView的所有行，进行排序
    For i As Integer = 0 To dgvData.Rows.Count - 2
        '获取当前单元格的值
        Dim currentValue As Object = dgvData.Rows(i).Cells(columnIndex - 1).Value

        '获取下一个单元格的值
        Dim nextValue As Object = dgvData.Rows(i + 1).Cells(columnIndex - 1).Value

        '如果当前单元格和下一个单元格的值都为空，则跳过本次循环
        If currentValue Is Nothing AndAlso nextValue Is Nothing Then
            Continue For
        End If

        '如果当前单元格的值为空，则将下一个单元格插入到当前单元格的前面
        If currentValue Is Nothing Then
            dgvData.Rows.RemoveAt(i + 1)
            dgvData.Rows.Insert(i, dgvData.Rows(i + 1))
            Continue For
        End If

        '如果下一个单元格的值为空，则将当前单元格插入到下一个单元格的前面
        If nextValue Is Nothing Then
            dgvData.Rows.RemoveAt(i)
            dgvData.Rows.Insert(i + 1, dgvData.Rows(i))
            Continue For
        End If

        '如果当前单元格的值小于下一个单元格的值，则将下一个单元格插入到当前单元格的前面
        If currentValue.CompareTo(nextValue) > 0 Then
            dgvData.Rows.RemoveAt(i + 1)
            dgvData.Rows.Insert(i, dgvData.Rows(i + 1))
            i -= 1
        End If
    Next
End Sub

Private Sub btnRight_Click(sender As Object, e As EventArgs) Handles btnRight.Click
    '获取当前选中的列
    Dim selectedColumn As DataGridViewColumn = dgvData.Columns(dgvData.CurrentCell.ColumnIndex)

    '获取当前选中列的索引
    Dim columnIndex As Integer = selectedColumn.Index

    '如果当前选中列是最后一列，则不能右移
    If columnIndex = dgvData.ColumnCount - 1 Then
        Return
    End If

    '将当前选中列的DisplayIndex加1，实现右移
    selectedColumn.DisplayIndex += 1

    '将右移后的列设置为选中状态
    dgvData.CurrentCell = dgvData.Rows(0).Cells(columnIndex + 1)

    '循环遍历DataGridView的所有行，进行排序
    For i As Integer = 0 To dgvData.Rows.Count - 2
        '获取当前单元格的值
        Dim currentValue As Object = dgvData.Rows(i).Cells(columnIndex + 1).Value

        '获取下一个单元格的值
        Dim nextValue As Object = dgvData.Rows(i + 1).Cells(columnIndex + 1).Value

        '如果当前单元格和下一个单元格的值都为空，则跳过本次循环
        If currentValue Is Nothing AndAlso nextValue Is Nothing Then
            Continue For
        End If

        '如果当前单元格的值为空，则将下一个单元格插入到当前单元格的前面
        If currentValue Is Nothing Then
            dgvData.Rows.RemoveAt(i + 1)
            dgvData.Rows.Insert(i, dgvData.Rows(i + 1))
            Continue For
        End If

        '如果下一个单元格的值为空，则将当前单元格插入到下一个单元格的前面
        If nextValue Is Nothing Then
            dgvData.Rows.RemoveAt(i)
            dgvData.Rows.Insert(i + 1, dgvData.Rows(i))
            Continue For
        End If

        '如果当前单元格的值小于下一个单元格的值，则将下一个单元格插入到当前单元格的前面
        If currentValue.CompareTo(nextValue) > 0 Then
            dgvData.Rows.RemoveAt(i + 1)
            dgvData.Rows.Insert(i, dgvData.Rows(i + 1))
            i -= 1
        End If
    Next
End Sub

这段代码通过btnLeft和btnRight两个按钮实现DataGridView的左移列和右移列，通过循环遍历DataGridView的所有行进行排序。