DataTable tempTable = new DataTable();
            string str = @"AA|BB|CC|DD|MM@@EE|FF|GG|HH|MM@@II|JJ|KK|LL|MM@@";
            string[] newstr = str.Split(new string[] { "@@" }, StringSplitOptions.RemoveEmptyEntries);
            string[] p = newstr[0].Split(new string[] { "|" }, StringSplitOptions.RemoveEmptyEntries);
            for (int i = 1; i <= p.Count(); i++)
            {
                DataColumn dataColumn = new DataColumn();
                dataColumn.DataType = typeof(string);
                dataColumn.ColumnName = "列名" + i.ToString();
                tempTable.Columns.Add(dataColumn);
            }
           
            List<string> strsplit = new List<string>();
            int len = 0;
            foreach (string s in newstr)
            {
                DataRow dr = tempTable.NewRow();
                strsplit = s.Split(new string[] { "|" }, StringSplitOptions.RemoveEmptyEntries).ToList();
                len = strsplit.Count;
                for (int i = 1; i <= len; i++)
                {
                    dr["列名" + i.ToString()] = strsplit[i - 1];
                }
                tempTable.Rows.Add(dr);
            }
            this.dataGridView1.DataSource = tempTable;