DataGridView 转换成 DataTable

 public static DataTable ConvertDgvDataToTable(DataGridView dgv)
        {
            DataTable dt = new DataTable();
            for (int count = 0; count < dgv.Columns.Count; count++) //循环DataGridView中的栏位
            {
                DataColumn dc = new DataColumn(dgv.Columns[count].Name.ToString());
                dt.Columns.Add(dc); //将DataGridView中栏位的标题写入到DataTable中
            }
            for (int count = 0; count < dgv.Rows.Count; count++) //循环DataGridView中的资料行
            {
                DataRow dr = dt.NewRow();
                for (int countsub = 0; countsub < dgv.Columns.Count; countsub++)
                {
                    dr[countsub] = dgv.Rows[count].Cells[countsub].Value.ToString();
                }
                dt.Rows.Add(dr);
            }
            return dt;
        }