C#实现DataTable数据行列转换

        public static DataTable RevertRowToColumn(DataTable sourcedt)
        {
            DataTable dt = new DataTable();
            //转换后的第一列名，以后此列每行存放sourcedt对应对应的每列列名
            dt.Columns.Add("COLUMN_NAME", typeof(string));

            //第二行及以后，转换后重命名的列名，列数等于sourcedt行数
            string[] aa = new string[sourcedt.Rows.Count];
            //string[] aa = { "VLAUE_1", "VLAUE_2", "VLAUE_3", "VLAUE_4", "VLAUE_5", "VLAUE_6", "VLAUE_7", "VLAUE_8", "VLAUE_9", "VLAUE_10" };
            for (int i = 0; i < sourcedt.Rows.Count; i++)
            {
                aa[i] = "VLAUE_" + (i + 1);
            }  

            //dt添加Columns
            for (int i = 0; i < aa.Length; i++)
            {
                dt.Columns.Add(aa[i].ToString(), typeof(string));//统一按照string类型进行存放
            }

            //对sourcedt进行转换
            for (int j = 0; j < sourcedt.Columns.Count; j++)
            {
                DataRow dr = dt.NewRow();
                string column_name = sourcedt.Columns[j].ColumnName;
                dr["COLUMN_NAME"] = column_name;//把source的列名赋值给转换成行的第一列值
                for (int i = 0; i < sourcedt.Rows.Count; i++)
                {
                    string cell_value = sourcedt.Rows[i][column_name].ToString();
                    dr[i + 1] = cell_value;
                }
                dt.Rows.Add(dr);
            }
            return dt;
        }