开发项目经验总结(一)

一.在类中使用Request,Response,Application对象时,前面要加上HttpContext.Current
例:HttpContext.Current.Application["GuestBook_TimeOut"]

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二.string vldLength = Regex.Replace(guestbook_details, "[\u4e00-\uf900]", "aa");
此句的意思是将regex.replace按照里面的"[\u4e00-\uf900]"这个正则表达式返回字符串的长度,中文为2字节,英文为1字节

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三. 很重要三层构架中必须用到这个..主要是DataSet比较好分页

 /// <summary>
        /// Ilist<T> 转换成 DataSet
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        static public DataSet ConvertToDataSet<T>(IList<T> list)
        {
            #region
            if (list == null || list.Count <= 0)
            {
                return null;
            }

            DataSet ds = new DataSet();
            DataTable dt = new DataTable(typeof(T).Name);
            DataColumn column;
            DataRow row;

            System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance);

            foreach (T t in list)
            {
                if (t == null)
                {
                    continue;
                }

                row = dt.NewRow();

                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];

                    string name = pi.Name;

                    if (dt.Columns[name] == null)
                    {
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }

                    row[name] = pi.GetValue(t, null);
                }

                dt.Rows.Add(row);
            }

            ds.Tables.Add(dt);

            return ds;
            #endregion
        }