DataGridView的行自动排序

[C#] //窗体的Load事件处理器 private void Form1_Load(object sender, EventArgs e) {     //自动排序     foreach (DataGridViewColumn c in DataGridView1.Columns)         c.SortMode = DataGridViewColumnSortMode.Automatic; } // Button1的Click事件处理器 private void Button1_Click(object sender, EventArgs e) {     if (DataGridView1.CurrentCell == null)         return;     //设定排序的列     DataGridViewColumn sortColumn = DataGridView1.CurrentCell.OwningColumn;     //设定排序的方向（升序、降序）     ListSortDirection sortDirection = ListSortDirection.Ascending;     if (DataGridView1.SortedColumn != null &&         DataGridView1.SortedColumn.Equals(sortColumn))     {         sortDirection =             DataGridView1.SortOrder == SortOrder.Ascending ?             ListSortDirection.Descending : ListSortDirection.Ascending;     }     //进行排序     DataGridView1.Sort(sortColumn, sortDirection); }