导出Excel

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;

namespace App_Helper
{
    public abstract class ExportBase
    {
        protected int ColumnNum;
        protected string separator = "	";
        protected string contentType = "text/plain";
        protected string fileExt = ".txt";

        protected ExportHeader header;
        protected ExportBody body;

        public ExportHeader Header { get { return header; } set { header = value; } }
        public ExportBody Body { get { return body; } set { body = value; } }
        public string ContentType { get { return contentType; } set { contentType = value; } }

        public ExportBase(int columnNum)
        {
            ColumnNum = columnNum;
            header = new ExportHeader(columnNum);
            body = new ExportBody(columnNum);
        }
        public bool SaveToFile(string fileName, Encoding encoding)
        {
            try
            {
                File.WriteAllText(fileName, Output(), encoding);
                return true;
            }
            catch
            {
                return false;
            }
        }
        public string Output()
        {
            StringBuilder result = new StringBuilder();
            result.Append(header.Output(separator));
            result.Append(Environment.NewLine);
            result.Append(body.Output(separator));
            return result.ToString();
        }
        public string BuildFileName(string fileName)
        {
            fileName = fileName.Split('.')[0];
            return fileName + fileExt;
        }
    }

    public class ExportContent
    {
        private List<string> content;

        //public ExportContent(int num) { content = new List<string>(num); }
        //去除初始可存储数据限制，使得能够导出大数据源 
        public ExportContent(int num) { content = new List<string>(); }
        public void SetContent(List<string> value)
        {
            content = value;
        }
        public void SetContent(params string[] value)
        {
            content.Clear();
            content.AddRange(value);
        }
        public string Output(string separator)
        {
            return string.Join(separator, content.ToArray());
        }

        /// <summary>
        /// 直接输出列表数据
        /// </summary>
        /// <returns></returns>
        public List<string> Output()
        {
            return content;
        }
    }
    public class ExportHeader
    {
        private ExportContent content;

        public ExportHeader(int num) { content = new ExportContent(num); }
        public void SetHeader(List<string> value)
        {
            content.SetContent(value);
        }
        public void SetHeader(params string[] value)
        {
            content.SetContent(value);
        }
        public string Output(string seperate)
        {
            return content.Output(seperate);
        }

        /// <summary>
        /// 直接输出Header列表
        /// </summary>
        /// <returns></returns>
        public List<string> Output()
        {
            return content.Output();
        }
    }
    public class ExportBody
    {
        private int ColumnNum;
        private List<ExportContent> content;

        public ExportBody(int num)
        {
            ColumnNum = num;
            content = new List<ExportContent>();
        }
        public void AddBody(List<String> value)
        {
            ExportContent item = new ExportContent(ColumnNum);
            item.SetContent(value);
            content.Add(item);
        }
        public void AddBody(params string[] value)
        {
            ExportContent item = new ExportContent(int.MaxValue);
            item.SetContent(value);
            content.Add(item);
        }
        public string Output(string seperate)
        {
            StringBuilder result = new StringBuilder();
            int count = content.Count();
            for (int i = 0; i < count; i++)
            {
                ExportContent item = content[i];
                result.Append(item.Output(seperate));
                if (i < count) result.Append(Environment.NewLine);
            }
            return result.ToString();
        }
     

        /// <summary>
        /// 直接输出列表内容
        /// </summary>
        /// <param name="seperate"></param>
        /// <returns></returns>
        public List<ExportContent> Output()
        {
            return content;
        }
    }

}

 

--------------------------------------------------------------

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace App_Helper
{

    public class Excel_File : ExportBase
    {
        public Excel_File(int num)
            : base(num)
        {
            separator = "	";
            contentType = "application/vnd.ms-excel";
            fileExt = ".xls";
        }

        public void Write(System.Web.HttpResponseBase Response, string filename)
        {
            Response.Clear();
            Response.Buffer = true;
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + filename + ".xls");
            Response.ContentEncoding = System.Text.Encoding.UTF8;
            Response.ContentType = "application/vnd.ms-excel";
            Response.Write(Output());
        }

    }

    public class Txt_File : ExportBase
    {
        public Txt_File(int num)
            : base(num)
        {
            separator = "	";
            contentType = "text/plain";
            fileExt = ".txt";
        }
    }

    public class CSV_File : ExportBase
    {
        public CSV_File(int num)
            : base(num)
        {
            separator = ",";
            contentType = "application/vnd.ms-excel";
            fileExt = ".csv";
        }
    }
}

 

 

 

-------------------------------------------------------------------------调用

 

  public ActionResult Exportexl(string StatDate, int Platform = 0)
        {
            Excel_File file = GetData(StatDate, Platform);
            ResponseHelper.DownloadFile(Response, file.BuildFileName("库存滞销"), file);
            return View();
        }

 

 

 //获取导出数据
        public Excel_File GetData(string StatDate, int Platform = 0)
        {

            Excel_File file = new Excel_File(12);

            file.Header.SetHeader(
               "组别",
               "组别",
               "组别",
               "组别",
               "组别",
               "组别",
               "组别",
               "组别",
               "组别",
               "组别",
               "组别",
               "组别"
            );

 

          foreach (Fact_sellercube_tb_statunsalablestore_result_Process_Mage areaitem in AreaList)
           {
                     file.Body.AddBody(
                         areaitem.Area,
                         areaitem.Team,
                         areaitem.Groups,
                         areaitem.NowStoreTotal.DecimalToString("F2"),
                         areaitem.amount60.DecimalToString("F2"),
                         areaitem.rate60.DecimalToString("F2"),
                         areaitem.rateold60.DecimalToString("F2"),
                         (areaitem.rate60 - areaitem.rateold60).DecimalToString("F2"),
                          areaitem.amount180.DecimalToString("F2"),
                         areaitem.rate180.DecimalToString("F2"),
                         areaitem.rateold180.DecimalToString("F2"),
                         (areaitem.rate180 - areaitem.rateold180).DecimalToString("F2")
                     );
            }

 

 }