using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Text;
using NPOI;
using NPOI.OpenXmlFormats.Wordprocessing;
using NPOI.XWPF.UserModel;


namespace ExportToWord.Report
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Export_Click(object sender, EventArgs e)
        {
            XWPFDocument doc;
            String template = AppDomain.CurrentDomain.BaseDirectory + "Template\\ReportTemplate.docx";   //模板地址
      
            using (FileStream stream = new FileStream(template, FileMode.Open, FileAccess.Read))
            {
                doc = new XWPFDocument(stream);
                for(int i=0;i< doc.Tables.Count;i++)
                {
                    for(int j=1;j<4; j++)  //给模板里的第一个table添加行和数据
                    {
                        if(j==1||j==2)   
                        { 
                        doc.Tables[0].Rows[j].GetCell(0).SetText("test");
                        }
                        else
                        { 
                        doc.Tables[0].CreateRow();
                        doc.Tables[0].Rows[j].GetCell(0).SetText("1");
                        doc.Tables[0].Rows[j].CreateCell().SetText("2");
                        doc.Tables[0].Rows[j].CreateCell().SetText("3");
                        doc.Tables[0].Rows[j].CreateCell().SetText("4");
                        }
                    }

                }

                stream.Close();
            }
            String filename = "Report_" + DateTime.Now.ToString("yyyyMMddHHmm") + ".docx";
            String fullpath = AppDomain.CurrentDomain.BaseDirectory + "Documents\\" + filename;
            FileStream file = new FileStream(fullpath, FileMode.Create, FileAccess.Write);
            doc.Write(file);
            file.Close();

            System.IO.FileInfo fileInfo = new System.IO.FileInfo(fullpath);  //返回Word流文件

            if (fileInfo.Exists == true)
            {
                const long ChunkSize = 102400;
                byte[] buffer = new byte[ChunkSize];

                Response.Clear();
                System.IO.FileStream iStream = System.IO.File.OpenRead(fullpath);
                long dataLengthToRead = iStream.Length;
                Response.ContentType = "application/octet-stream";
                Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(filename));
                while (dataLengthToRead > 0 && Response.IsClientConnected)
                {
                    int lengthRead = iStream.Read(buffer, 0, Convert.ToInt32(ChunkSize));
                    Response.OutputStream.Write(buffer, 0, lengthRead);
                    Response.Flush();
                    dataLengthToRead = dataLengthToRead - lengthRead;
                }
                Response.Close();
                iStream.Close();
                Response.End();
            }
    }



        private static void ReplaceKey(XWPFParagraph para, string content) //拓展方法
        {
            string text = "";
            foreach (var run in para.Runs)
            {
                text = run.ToString();
                run.SetText(content, 0);
            }
        }
    }
    }