winform dataGridView 点击列标题排序

winform手动绑定数据后，点击列标题不能实现自动排序，苦苦寻找方法，发现下面的是可行的。

//建立DataTable将当前dataGridView中的数据读进DataTable中

        public DataTable dvtodt(DataGridView dv)
        {
            DataTable dt = new DataTable();
            DataColumn dc;
            for (int i = 0; i < dv.Columns.Count; i++)
            {
                dc = new DataColumn();
                dc.ColumnName = dv.Columns[i].HeaderText.ToString();
                dt.Columns.Add(dc);
            }
            for (int j = 0; j < dv.Rows.Count; j++)
            {
                DataRow dr = dt.NewRow();
                for (int x = 0; x < dv.Columns.Count; x++)
                {
                    dr[x] = dv.Rows[j].Cells[x].Value;
                }
                dt.Rows.Add(dr);
            }
            return dt;
        } 

 

 

调用方法：

 

        private void dataGridView1_ColumnHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            //取得点击列的索引
            int nColumnIndex = e.ColumnIndex;
            DataTable d = dvtodt(dataGridView1);
            if (SortOrder_ == 0)    //程序開始定義   private int SortOrder_=0;
            {
                d.DefaultView.Sort = this.dataGridView1.Columns[nColumnIndex].Name + " ASC";    //指定升序排列
                SortOrder_ = 1;
            }
            else
            {
                d.DefaultView.Sort = this.dataGridView1.Columns[nColumnIndex].Name + " desc";   //再次點擊變爲降序排列
                SortOrder_ = 0;
            }
            dataGridView1.Columns.Clear();
            dataGridView1.DataSource = d;

        }

已实现双向排序