我写的下载文件代码怎么没有后缀名啊..
public ActionResult DownLoad() {
int id =Convert.ToInt32(Session["id"]);
Article article = resourceMangerServices.GetArticleById(id);
string directory = Server.MapPath("/FileUpdate");
string FilePath = directory + article.Attachment;
System.IO.FileInfo DownloadFile = new System.IO.FileInfo(FilePath);
Response.Clear();
Response.ContentType = "application/octet-stream ";
Response.AppendHeader("Content-Disposition ", "attachment;filename=" + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
Response.WriteFile(DownloadFile.FullName);
Response.Flush();
Response.End();
return new EmptyResult();
} 高手 求解
[解决办法]
定义个处理程序
<a href="/DownloadHandler.ashx?filename=111111">点击下载</a>
public class DownloadHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
HttpRequest Request = HttpContext.Current.Request;
HttpResponse Response = HttpContext.Current.Response;
string strDirectory = HttpContext.Current.Server.MapPath("~");
string strFilePath = strDirectory + context.Request.QueryString["filename"]; //真实文件地址
System.IO.FileInfo DownloadFile = new System.IO.FileInfo(strFilePath );
string strFileName = DownloadFile.Name;
byte[] datas = System.IO.File.ReadAllBytes(strFilePath);
Response.AddHeader("Content-Disposition", "attachment;filename= \"" + HttpUtility.UrlEncode(strFileName) + "\";");
Response.AddHeader("Content-Type", "text/html"); // 需修改
Response.OutputStream.Write(datas, 0, datas.Length);
}
public bool IsReusable
{
get
{
return false;
}
}
}
[解决办法]
using System;using System.Collections;using System.Data;using System.Linq;using System.Web;using System.Web.Services;using System.Web.Services.Protocols;using System.Xml.Linq;namespace Asiastar.NR.Ajax{ /// <summary> /// $codebehindclassname$ 的摘要说明 /// </summary> [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] public class Handler1 : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/plain"; string id = context.Request["id"].ToString();//获取资源的编号 System.IO.Stream iStream = null; byte[] buffer = new Byte[10000]; int length; long dataToRead; NRBLL.File bf = new Asiastar.NRBLL.File(); Guid guid = new Guid(id); if (bf.FN_SerchPathByFileId(guid).Tables[0].Rows[0]["FilePath"] != null)//判断数据库路径是否存在 { string filepath = bf.FN_SerchPathByFileId(guid).Tables[0].Rows[0]["FilePath"].ToString();//获取资源完整路径 D:\资源文件\600cc139-14cf-448e-9e50-daa972d35e01.jpg string Oidfilename = bf.FN_SerchPathByFileId(guid).Tables[0].Rows[0]["FileNam"].ToString();//旧文件名称 //string filename = System.IO.Path.GetFileName(filepath);//获取文件名称+后缀名 600cc139-14cf-448e-9e50-daa972d35e01.JPG //int index = filepath.IndexOf("."); //string filetype = filepath.Substring(index).ToLower();//后缀名 //string newfilename = Oidfilename; //string filepath1 = bf.FN_SerchPathByFileId(guid).Tables[0].Rows[0]["FilePath"].ToString().Substring(0,filepath.Length - 8); try { string fileName = HttpUtility.UrlEncode(System.Text.Encoding.UTF8.GetBytes(Oidfilename));//解码(注意这里2层解码) Oidfilename = Oidfilename.Replace("+", "%20"); //将“+”替换成“空格” iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read); dataToRead = iStream.Length; context.Response.ContentType = "application/octet-stream"; context.Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(Oidfilename, System.Text.Encoding.UTF8)); //下载的时候下载原来的文件名称 while (dataToRead > 0) { if (context.Response.IsClientConnected) { length = iStream.Read(buffer, 0, 10000); context.Response.OutputStream.Write(buffer, 0, length); context.Response.Flush(); buffer = new Byte[10000]; dataToRead = dataToRead - length; } else { dataToRead = -1; } } } catch (Exception ex) { NR.Error.Log.LogType(ex.ToString()); } finally { if (iStream != null) { iStream.Close(); } } } else { NR.Error.Log.LogType("找不到文件!"); } } public bool IsReusable { get { return false; } } }}