C#教程之网页HTML格式导出EXCEL.XLS

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C#教程之网页HTML格式导出EXCEL.XLS

1.创建excel方法

			
 /// <summary>
        /// 创建Excel表格
        /// </summary>
        /// <param name="dt">数据流</param>
        /// <param name="FileName">文件名称</param>
        public static void CreateExcel(DataTable dt, string FileName)
        {
            StringBuilder strb = new StringBuilder();

            strb.Append(" <html xmlns:o=\"urn:schemas-microsoft-com:office:office\"");

            strb.Append("xmlns:x=\"urn:schemas-microsoft-com:office:excel\"");

            strb.Append("xmlns=\"http://www.w3.org/TR/REC-html40\">");

            strb.Append(" <head> <meta http-equiv='Content-Type' content='text/html; charset=gb2312'>");

            strb.Append(" <style>");

            strb.Append(".xl26");

            strb.Append(" {mso-style-parent:style0;");

            strb.Append(" font-family:\"Times New Roman\", serif;");

            strb.Append(" mso-font-charset:0;");

            strb.Append(" mso-number-format:\"@\";}");

            strb.Append(" </style>");

            strb.Append(" <xml>");

            strb.Append(" <x:ExcelWorkbook>");

            strb.Append("  <x:ExcelWorksheets>");

            strb.Append("  <x:ExcelWorksheet>");

            strb.Append("    <x:Name>Sheet1 </x:Name>");

            strb.Append("    <x:WorksheetOptions>");

            strb.Append("    <x:DefaultRowHeight>285 </x:DefaultRowHeight>");

            strb.Append("    <x:Selected/>");

            strb.Append("    <x:Panes>");

            strb.Append("      <x:Pane>");

            strb.Append("      <x:Number>3 </x:Number>");

            strb.Append("      <x:ActiveCol>1 </x:ActiveCol>");

            strb.Append("      </x:Pane>");

            strb.Append("    </x:Panes>");

            strb.Append("    <x:ProtectContents>False </x:ProtectContents>");

            strb.Append("    <x:ProtectObjects>False </x:ProtectObjects>");

            strb.Append("    <x:ProtectScenarios>False </x:ProtectScenarios>");

            strb.Append("    </x:WorksheetOptions>");

            strb.Append("  </x:ExcelWorksheet>");

            strb.Append("  <x:WindowHeight>6750 </x:WindowHeight>");

            strb.Append("  <x:WindowWidth>10620 </x:WindowWidth>");

            strb.Append("  <x:WindowTopX>480 </x:WindowTopX>");

            strb.Append("  <x:WindowTopY>75 </x:WindowTopY>");

            strb.Append("  <x:ProtectStructure>False </x:ProtectStructure>");

            strb.Append("  <x:ProtectWindows>False </x:ProtectWindows>");

            strb.Append(" </x:ExcelWorkbook>");

            strb.Append(" </xml>");

            strb.Append("");

            strb.Append(" </head> <body> <table align=\"center\" style='border-collapse:collapse;table-layout:fixed'> <tr>");

            //写列标题    

            int columncount = dt.Columns.Count;

            for (int columi = 0; columi < columncount; columi++)
            {

                strb.Append(" <td> <b>" + dt.Columns[columi] + " </b> </td>");

            }

            strb.Append(" </tr>");

            //写数据    

            for (int i = 0; i < dt.Rows.Count; i++)
            {

                strb.Append(" <tr>");

                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    strb.Append(" <td class='xl26'>" + dt.Rows[i][j].ToString() + " </td>");
                }

                strb.Append(" </tr>");
            }

            strb.Append(" </table>");

            strb.Append(" </body> </html>");

            HttpContext.Current.Response.Clear();

            HttpContext.Current.Response.Buffer = true;

            HttpContext.Current.Response.Charset = "GB2312";

            HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);

            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文    

            HttpContext.Current.Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。    

            HttpContext.Current.Response.Write(strb);

            HttpContext.Current.Response.End();

        }

2.List集合转DateTable，根据属性特性[System.ComponentModel.Description("列名称")]指定名称，没有指定名称列则不会导出

			
#region List集合转DateTable
        /// <summary>
        /// List集合转DateTable
        /// </summary>
        /// <typeparam name="T">泛型类</typeparam>
        /// <param name="items">参数名</param>
        /// <returns></returns>
        private DataTable ToDataTable<T>(List<T> items)
        {
            var tb = new DataTable(typeof(T).Name);

            List<PropertyInfo> props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance).ToList();

            #region MyRegion
            //foreach (PropertyInfo prop in props)
            //{
            //    string name = "";
            //    //获取特性值
            //    object[] da = prop.GetCustomAttributes(typeof(DescriptionAttribute), false);
            //    if (da.Length != 0)
            //    {
            //        name = (da[0] as DescriptionAttribute).Description;
            //        Type t = GetCoreType(prop.PropertyType);
            //        tb.Columns.Add(name, t);
            //    }
            //    else
            //    {
            //        //name = prop.Name;

            //        props.Remove(prop);
            //    }
            //} 
            #endregion

            for (int i = 0; i < props.Count; i++)
            {
                string name = "";
                //获取特性值
                object[] da = props[i].GetCustomAttributes(typeof(DescriptionAttribute), false);
                if (da.Length != 0)
                {
                    name = (da[0] as DescriptionAttribute).Description;
                    Type t = GetCoreType(props[i].PropertyType);
                    tb.Columns.Add(name, t);
                }
                else
                {
                    //name = prop.Name;
                    props.Remove(props[i]);
                    i--;
                }
            }

            foreach (T item in items)
            {
                var values = new object[props.Count];

                for (int i = 0; i < props.Count; i++)
                {
                    values[i] = props[i].GetValue(item, null);
                }

                tb.Rows.Add(values);
            }

            return tb;
        }
        public static bool IsNullable(Type t)
        {
            return !t.IsValueType || (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>));
        }
        public static Type GetCoreType(Type t)
        {
            if (t != null && IsNullable(t))
            {
                if (!t.IsValueType)
                {
                    return t;
                }
                else
                {
                    return Nullable.GetUnderlyingType(t);
                }
            }
            else
            {
                return t;
            }
        } 
        #endregion
			

3.创建数据源，调用方法

			
    public void UserWithdrawExcelList()
        {
            //数据源，根据自己需要来取
            List<UserWithdrawQueryViewModel> userList = UserWithdrawBLL.GetUserWithdrawListExcel(paramdic);

            DataTable dt = ToDataTable<UserWithdrawQueryViewModel>(userList);
            #region MyRegion
            //DataTable dt = new DataTable();
            //dt.Columns.Add("用户名", typeof(String));
            //dt.Columns.Add("提现标题", typeof(String));
            //dt.Columns.Add("提现总金额", typeof(String));
            //dt.Columns.Add("实际到账金额", typeof(String));
            //dt.Columns.Add("提现手续费", typeof(String));
            //dt.Columns.Add("提现账户", typeof(String));
            //dt.Columns.Add("提现状态", typeof(String));
            //dt.Columns.Add("创建时间", typeof(DateTime));
            //userList.TryForEach(t =>
            //{
            //    dt.Rows.Add(new object[] { 
            //        t.UserName,t.WithTitle,t.WithTotalAmount,t.WithAmount,t.CounterFee,t.BankCode,t.StatusName,t.AddTime
            //    });
            //}); 
            #endregion
            DataView dv = dt.DefaultView;//获取表视图
            dv.ToTable();//转为表

            DataChangeExcel.CreateExcel(dt, DateTime.Now.ToString("yyyyMMddHHmmssffff") + ".xls");
        }        
			

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