下载文件

  1 using Console_Core.BLL;
  2 using Console_Core.Model;
  3 using NPOI.HSSF.UserModel;
  4 using NPOI.SS.UserModel;
  5 using System;
  6 using System.Collections.Generic;
  7 using System.Drawing;
  8 using System.Drawing.Imaging;
  9 using System.IO;
 10 using System.Linq;
 11 using System.Reflection;
 12 using System.Web;
 13 
 14 namespace Web_Cassini
 15 {
 16     /// <summary>
 17     /// download1 的摘要说明
 18     /// </summary>
 19     public class download1 : IHttpHandler
 20     {
 21 
 22         public void ProcessRequest(HttpContext context)
 23         {
 24             context.Response.ContentType = "text/plain";
 25             MyORM_BLL myORM_BLL = new MyORM_BLL();
 26 
 27             #region 默认把当前输出的文件 以附加形式 动态下载 到指定文件中
 28             //默认把当前输出的文件 以附加形式 动态下载 到指定文件中   --AddHeader把表头输出到输出流
 29             context.Response.AddHeader("Content-Disposition", "attachment;filename=" + context.Server.UrlDecode("动态文件.txt") + "");
 30             List<object> list = myORM_BLL.SelectAllModel(typeof(TC_STUDENT));
 31             foreach (var obj in list)
 32             {
 33                 TC_STUDENT tc = obj as TC_STUDENT;
 34                 context.Response.Write(tc.USERNAME + "\t" + tc.PASSWORD + "\t" + tc.GENDER + "\t" + tc.PROFESSION);
 35             } 
 36             #endregion
 37 
 38             #region 默认把当前Excel 动态的以附件形式 下载
 39             context.Response.AddHeader("Content-Disposition", "attachment;filename=" + context.Server.UrlEncode("学生信息.xls"));
 40             List<object> list = myORM_BLL.SelectAllModel(typeof(TC_STUDENT));
 41             //引用NPOI
 42             //创建一个workbook
 43             IWorkbook workbook = new HSSFWorkbook();
 44             //创建sheet
 45             ISheet sheet = workbook.CreateSheet("学生信息");
 46             //遍历List 每一个实例创建一个row
 47             for (int i = 0; i < list.Count; i++)
 48             {
 49                 TC_STUDENT tc = list[i] as TC_STUDENT;
 50                 IRow row = sheet.CreateRow(i);
 51                 Type ty = tc.GetType();
 52                 PropertyInfo[] props = ty.GetProperties();
 53                 //遍历 实例中的列 灭一个列创建一个cell
 54                 for (int j = 0; j < props.Length; j++)
 55                 {
 56                     string propName = props[j].Name;
 57                     object propValue = props[j].GetValue(tc);
 58                     ICell cell = row.CreateCell(j);
 59                     cell.SetCellValue(propValue.ToString());
 60                 }
 61             }
 62             //把workbook写入到输出流，并以附件形式下载
 63             workbook.Write(context.Response.OutputStream); 
 64             #endregion
 65 
 66             #region 动态的 附加形式 下载图片
 67             //动态的 附加形式 下载图片
 68             context.Response.AddHeader("Content-Disposition", "attachment;filename=" + context.Server.UrlEncode("泡妞证.jpg") + "");
 69             //获得name
 70             string name = context.Request["name"];
 71             //画出图片
 72             using (Bitmap map = new Bitmap(500, 500))
 73             using (Graphics g = Graphics.FromImage(map))
 74             using (Font font1 = new Font(System.Drawing.FontFamily.GenericSerif, 30))
 75             using (Font font2 = new Font(System.Drawing.FontFamily.GenericSerif, 15))
 76             {
 77                 g.DrawString(name, font1, Brushes.Red, 110, 66);
 78                 g.DrawString(name, font2, Brushes.Red, 302, 150);
 79 
 80                 map.Save(context.Response.OutputStream, ImageFormat.Jpeg);
 81             } 
 82             #endregion
 83 
 84             #region 通过提取码 动态下载图片
 85             //获得提取码
 86             string code = context.Request["code"];
 87             //验证 提取码
 88             if (code != "1234")
 89             {
 90                 context.Response.Write("提取码错误");
 91                 return;
 92             }
 93             //获得图片路径 写入流 Copy到输出流
 94             string path = context.Server.MapPath("~/img/我爱你一万年158_038.jpg");
 95             using (Stream stream = File.OpenRead(path))
 96             {
 97                 //html头标记：动态附加形式 下载图片
 98                 context.Response.AddHeader("Content-Disposition", "attachment;filename=" + context.Server.UrlEncode("我爱你一万年158_038.jpg") + "");
 99                 stream.CopyTo(context.Response.OutputStream);
100             } 
101             #endregion
102         }
103 
104         public bool IsReusable
105         {
106             get
107             {
108                 return false;
109             }
110         }
111     }
112 }