下载权限控制

[jakecheng]

只是我写的一段程序，但是其中有一个部分有错误，我一直弄不懂，哪里错了？应该怎么写？
context.Response.AddHeader("Content-Disposition", string Format("attachment: filename=\"{0}\"",encodename));
这句在编译的时候，出现了
1、错误 1 无效的表达式项“string” E:\CSharp实验\asp\下载及权限控制\ashx\download.ashx.cs 27
2、错误 2 无效的表达式项“)” E:\CSharp实验\asp\下载及权限控制\ashx\download.ashx.cs 27
3、错误 3 应输入 ; E:\CSharp实验\asp\下载及权限控制\ashx\download.ashx.cs 27
4错误 4 应输入 ; E:\c#shiyan\asp1\Default.aspx.cs 25




using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.SessionState;
using System.Web.Services;
using 下载及权限控制.dat.UserDateTableAdapters;

namespace 下载及权限控制.ashx
{
/// <summary>
/// $codebehindclassname$ 的摘要说明
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class download : IHttpHandler,IRequiresSessionState
{

public void ProcessRequest(HttpContext context)
{
//登陆成功时候
if(context.Session["name"]!=null)
{
string filename = context.Request["FileName"];
context.Response.ContentType = "image/JPEG";
string encodename = HttpUtility.UrlEncode(filename);
context.Response.AddHeader("Content-Disposition", string Format("attachment: filename=\"{0}\"",encodename));

int userid=(int)context.Session["userID"];//获取传过来的等级
userinformationTableAdapter getID = new userinformationTableAdapter();
var ID = getID.GetDataByuserID(userid);
var date = ID.Single();


if (date.userID == 1)//会员
{
//获取文件位置并转换成url地址

context.Response.WriteFile("images/"+filename);

}
else//一般用户
{
}

}
//登录失败
else
{
context.Response.Redirect("~/page/登陆界面.aspx");
}
}

public bool IsReusable
{
get
{
return false;
}
}
}
}



请高手指导一下？是不是语句问题？还是？

[ZhuZhuYuXiang]

using 下载及权限控制.dat.UserDateTableAdapters;

namespace 下载及权限控制.ashx

这个给力！不过用汉语容易出错！

    public void FileDownLoad(string fullFileName)
    {
        FileInfo downFiel = new FileInfo(fullFileName);

        string filepath = Server.MapPath("DownFile"+"//"+fullFileName);

        FileStream fs = new FileStream(filepath, FileMode.Open);
        byte[] bytes = new byte[(int)fs.Length];
        fs.Read(bytes, 0, bytes.Length);
        fs.Close();
        Response.ContentType = "application/octet-stream";
        //通知浏览器下载文件而不是打开
        Response.AddHeader("Content-Disposition", "attachment;  filename=" + HttpUtility.UrlEncode(fullFileName, System.Text.Encoding.UTF8));

        Response.BinaryWrite(bytes);
        Response.Flush();
        Response.End();
    }

[随心录123]

string strFilePath = Server.MapPath("../Files//" + ds.Tables["files"].Rows[0][0].ToString());
//下载指定的文件
if (File.Exists(strFilePath))
{
System.IO.FileInfo file = new System.IO.FileInfo(strFilePath);
Response.Clear();
Response.ClearHeaders();
Response.Buffer = true;
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(file.Name));
Response.AppendHeader("Content-Length", file.Length.ToString());
Response.WriteFile(file.FullName);
Response.Flush();
Response.End();
}

[ZhuZhuYuXiang]

把代码行号粘过来，27行有错，是不是少了或者多了个“）”，或者没有结束符“；”好好的检查下

[子夜__]

#region 文件下载
       public bool DownLoadFile(string localPath, string hostURL, int byteCount, string userID, long cruuent)
       {
           
           bool result = true;
           
           
           string tmpURL = hostURL;
          
           byteCount = byteCount * 1024;
           hostURL = tmpURL + "&npos=" + cruuent.ToString();
           
           System.IO.FileStream fs;  
           fs = new FileStream(localPath, FileMode.OpenOrCreate);
           if (cruuent > 0)
           {
               //偏移指针
               fs.Seek(cruuent, System.IO.SeekOrigin.Current); 
           }


           System.Net.HttpWebRequest request = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(hostURL);
           if (cruuent > 0)
           {
               request.AddRange(Convert.ToInt32(cruuent));    //设置Range值
           }

           try
           {
               //向服务器请求，获得服务器回应数据流
               System.IO.Stream ns = request.GetResponse().GetResponseStream();

               byte[] nbytes = new byte[byteCount];
               int nReadSize = 0;
               nReadSize = ns.Read(nbytes, 0, byteCount);
              
               while (nReadSize > 0)
               {
                   fs.Write(nbytes, 0, nReadSize);
                   nReadSize = ns.Read(nbytes, 0, byteCount);
                  
               }
               fs.Close();
               ns.Close();
           }
           catch(Exception ex)
           {
               LOG.Error("下载" + localPath + "的时候失败！" + "原因是:" + ex.Message);
               fs.Close();
               result = false;
           }
           return result;     
       }
       #endregion