C# 类型转换

　　　　　/// <summary>
        /// 将DataTable 转换为 List集合
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="dt"></param>
        /// <returns></returns>
        public List<T> DtToModel<T>(DataTable dt) where T : class, new()
        {
            List<T> list = new List<T>();
            T model = new T();
            Type type = typeof(T);
            PropertyInfo[] props = type.GetProperties();
            foreach (DataRow dr in dt.Rows)
            {
                foreach (var item in props)
                {
                    if (dt.Columns.Contains(item.Name))
                    {
                        item.SetValue(model, dr[item.Name]);
                    }
                }
                list.Add(model);
            }
            return list;
        }

        /// <summary>
        /// 将实体模型转换为DataTable
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="model"></param>
        /// <returns></returns>
        public DataTable ModelToDt<T>(T model) where T : class, new()
        {
            Type type = typeof(T);
            DataTable dt = new DataTable();
            PropertyInfo[] props = type.GetProperties();
            foreach (var item in props)
            {
                dt.Columns.Add(item.Name);
            }
            DataRow dr = dt.NewRow();
            foreach (var item in props)
            {
                if (dt.Columns.Contains(item.Name))
                {
                    dr[item.Name] = item.GetValue(model);
                }
            }
            dt.Rows.Add(dr);
            return dt;
        }