/// <summary>

        /// 键值集合List转换成datatable

        /// </summary>

        /// <param name="data">数据源</param>

        /// <returns></returns>

        DataTable ToDataTable(List<Dictionary<string, string>> data)

        {

            DataTable dt = new DataTable();

            foreach (var item in data[].Keys)

            {//循环添加列

                dt.Columns.Add(new DataColumn(item));

            }

            foreach (var item in data)

            {//把数据填充到行

                DataRow dr = dt.NewRow();

                foreach (var ii in item)

                {

                    dr[ii.Key] = ii.Value;

                }

                //把数据添加到datatable

                dt.Rows.Add(dr);

            }

            return dt;

        }

         //调用

        List<Dictionary<string, string>> data = new List<Dictionary<string, string>>();

         ToDataTable(data)