ASP.NET开发中使用网络驱动器存取文件

参考http://www.cnblogs.com/sqzhuyi/archive/2011/01/15/aspnet-remote.html

 

1、需求

　　做WEB项目的时候都会碰到这样一个需求：

　　当用户上传文件时，需要将上传的文件保存到另外一台专门的文件服务器。

2、解决方案

　　方案一、在文件服务器上新建一站点，用来接收上传的文件，然后保存。（将上传文件的FORM表单的ACTION属性指向文件服务器上的站点即可）

　　方案二、将文件服务器的指定目录共享给WEB服务器，用来保存文件。

 

3、实现步骤

　　问题（在WEB服务器上做下磁盘映射，IIS默认账户为NETWORK_SERVICE，该账户是没权限访问共享目录的，所以当你把站点部署到IIS上的时候，再访问映射磁盘就会报“找不到路径”的错误）

 

（1）在文件服务器上创建共享目录，并新建访问账户。

　　　比如共享目录为：\\192.168.0.9\share

　　　访问账户为：user-1 密码为：123456

　　　确保在WEB服务器上可以访问到这个目录

 

（2）建立公共类

　　　　

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Linq;
  4 using System.Text;
  5 
  6 namespace Gloable
  7 {
  8     //========================================
  9     //  Description: 
 10     //       Author:
 11     //     DateTime: 2016/8/12 12:23:16
 12     //========================================    
 13     public class LogonImpersonate : IDisposable
 14     {
 15         static public string DefaultDomain
 16         {
 17             get
 18             {
 19                 return ".";
 20             }
 21         }
 22 
 23         const int LOGON32_LOGON_INTERACTIVE = 2;
 24         const int LOGON32_PROVIDER_DEFAULT = 0;
 25 
 26         [System.Runtime.InteropServices.DllImport("Kernel32.dll")]
 27         extern static int FormatMessage(int flag, ref   IntPtr source, int msgid, int langid, ref   string buf, int size, ref   IntPtr args);
 28 
 29         [System.Runtime.InteropServices.DllImport("Kernel32.dll")]
 30         extern static bool CloseHandle(IntPtr handle);
 31 
 32         [System.Runtime.InteropServices.DllImport("Advapi32.dll", SetLastError = true)]
 33         extern static bool LogonUser(
 34         string lpszUsername,
 35         string lpszDomain,
 36         string lpszPassword,
 37         int dwLogonType,
 38         int dwLogonProvider,
 39         ref   IntPtr phToken
 40         );
 41 
 42         IntPtr token;
 43         System.Security.Principal.WindowsImpersonationContext context;
 44 
 45         public LogonImpersonate(string username, string password)
 46         {
 47             if (username.IndexOf("\\") == -1)
 48             {
 49                 Init(username, password, DefaultDomain);
 50             }
 51             else
 52             {
 53                 string[] pair = username.Split(new char[] { '\\' }, 2);
 54                 Init(pair[1], password, pair[0]);
 55             }
 56         }
 57         public LogonImpersonate(string username, string password, string domain)
 58         {
 59             Init(username, password, domain);
 60         }
 61         void Init(string username, string password, string domain)
 62         {
 63             if (LogonUser(username, domain, password, LOGON32_LOGON_INTERACTIVE, LOGON32_PROVIDER_DEFAULT, ref   token))
 64             {
 65                 bool error = true;
 66                 try
 67                 {
 68                     context = System.Security.Principal.WindowsIdentity.Impersonate(token);
 69                     error = false;
 70                 }
 71                 finally
 72                 {
 73                     if (error)
 74                         CloseHandle(token);
 75                 }
 76             }
 77             else
 78             {
 79                 int err = System.Runtime.InteropServices.Marshal.GetLastWin32Error();
 80 
 81                 IntPtr tempptr = IntPtr.Zero;
 82                 string msg = null;
 83 
 84                 FormatMessage(0x1300, ref   tempptr, err, 0, ref   msg, 255, ref   tempptr);
 85 
 86                 throw (new Exception(msg));
 87             }
 88         }
 89         ~LogonImpersonate()
 90         {
 91             Dispose();
 92         }
 93         public void Dispose()
 94         {
 95             if (context != null)
 96             {
 97                 try
 98                 {
 99                     context.Undo();
100                 }
101                 finally
102                 {
103                     CloseHandle(token);
104                     context = null;
105                 }
106             }
107         }
108 
109 
110 
111     }
112 }
LogonImpersonate

 

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Runtime.InteropServices;
 6 
 7 namespace Gloable
 8 {
 9     //========================================
10     //  Description: 
11     //       Author:
12     //     DateTime: 2016/8/12 12:21:45
13     //========================================    
14     public class WNetHelper
15     {
16 
17         [DllImport("mpr.dll", EntryPoint = "WNetAddConnection2")]
18         private static extern uint WNetAddConnection2(NetResource lpNetResource, string lpPassword, string lpUsername, uint dwFlags);
19 
20         [DllImport("Mpr.dll", EntryPoint = "WNetCancelConnection2")]
21         private static extern uint WNetCancelConnection2(string lpName, uint dwFlags, bool fForce);
22 
23         [StructLayout(LayoutKind.Sequential)]
24         public class NetResource
25         {
26             public int dwScope;
27 
28             public int dwType;
29 
30             public int dwDisplayType;
31 
32             public int dwUsage;
33 
34             public string lpLocalName;
35 
36             public string lpRemoteName;
37 
38             public string lpComment;
39 
40             public string lpProvider;
41         }
42 
43         /// <summary>
44         /// 为网络共享做本地映射
45         /// </summary>
46         /// <param name="username">访问用户名（windows系统需要加计算机名，如：comp-1\user-1）</param>
47         /// <param name="password">访问用户密码</param>
48         /// <param name="remoteName">网络共享路径（如：\\192.168.0.9\share）</param>
49         /// <param name="localName">本地映射盘符</param>
50         /// <returns></returns>
51         public static uint WNetAddConnection(string username, string password, string remoteName, string localName)
52         {
53             NetResource netResource = new NetResource();
54 
55             netResource.dwScope = 2;
56             netResource.dwType = 1;
57             netResource.dwDisplayType = 3;
58             netResource.dwUsage = 1;
59             netResource.lpLocalName = localName;
60             netResource.lpRemoteName = remoteName.TrimEnd('\\');
61             uint result = WNetAddConnection2(netResource, password, username, 0);
62 
63             return result;
64         }
65 
66         public static uint WNetCancelConnection(string name, uint flags, bool force)
67         {
68             uint nret = WNetCancelConnection2(name, flags, force);
69 
70             return nret;
71         }
72 
73     }
74 }
WNetHelper

 

（3）实现代码

  1 using System;
  2 using System.Collections.Generic;
  3 using System.Data;
  4 using System.Diagnostics;
  5 using System.Drawing;
  6 using System.IO;
  7 using System.Linq;
  8 using System.Web;
  9 using System.Web.UI;
 10 using System.Web.UI.WebControls;
 11 using Microsoft.Win32;
 12 using System.IO;
 13 
 14 
 15 namespace CloudCustoms.jiekou
 16 {
 17     public partial class IKEAList : System.Web.UI.Page
 18     {
 19         private static string username = "user_ikea";
 20         private static string AreaUsername = @"KEYUE83\user_ikea";
 21         private static string pwd = "user_ikea_keyue";
 22 
 23         
 24         protected void btnDownload_Click1(object sender, EventArgs e)
 25         {
 26             //为IIS制定账号
 27             Gloable.LogonImpersonate imper = new Gloable.LogonImpersonate(username, pwd);
 28             Gloable.WNetHelper.WNetAddConnection(AreaUsername, pwd, @"\\192.168.100.83\swbPDF", "X:");
 29             Gloable.WNetHelper.WNetAddConnection(AreaUsername, pwd, @"\\192.168.100.83\psrPDF", "Y:");
 30 
 31             string coolist = string.Empty;
 32             string swblist = string.Empty;
 33 
 34             //遍历服务器指定文件夹下的所有文件
 35             string serverPath = @"X:";
 36 
 37             //创建临时文件夹
 38             string tempName =  DateTime.Now.ToString("yyyyMMddHHmmss");
 39             string tempFolder = Path.Combine(serverPath, tempName);
 40             Directory.CreateDirectory(tempFolder);
 41 
 42 
 43             for (int i = 0; i < gv_ikealist.Rows.Count; i++)
 44             {
 45                 CheckBox cb = gv_ikealist.Rows[i].Cells[0].FindControl("ckbSelect") as CheckBox;
 46                 if (cb.Checked)
 47                 {
 48                     HiddenField hidcoo = gv_ikealist.Rows[i].Cells[11].FindControl("hidCOO") as HiddenField;
 49                     HiddenField hidswb = gv_ikealist.Rows[i].Cells[12].FindControl("hidswb") as HiddenField;
 50 
 51                     if (!string.IsNullOrEmpty(hidcoo.Value.Trim()))
 52                     {
 53                         string filename = hidcoo.Value.Trim().Replace(@"www.52xinhai.com\ikea\psrPDF\", "");
 54                         File.Copy(@"Y:\" + filename, tempFolder + "/" + filename);                    
 55                     }
 56 
 57 
 58                     if (!string.IsNullOrEmpty(hidswb.Value.Trim()))
 59                     {
 60                         string filename = hidswb.Value.Trim().Replace(@"www.52xinhai.com\ikea\swbPDF\", "");
 61                         File.Copy(@"X:\" + filename, tempFolder + "/" + filename);                     
 62                     }
 63                 }
 64             }
 65 
 66             //产生RAR文件，及文件输出
 67             string rarpath = serverPath + @"\" + tempName + ".rar";
 68             string err = string.Empty;
 69             Gloable.ZipFileClass zip = new Gloable.ZipFileClass();
 70             zip.ZipFile(tempFolder, rarpath, out err);
 71             DownloadRAR(rarpath);
 72             
 73         }
 74 
 75         /// <summary>
 76         /// 下载生成的RAR文件
 77         /// </summary>
 78         private void DownloadRAR(string file)
 79         {
 80             FileInfo fileInfo = new FileInfo(file);
 81             Response.Clear();
 82             Response.ClearContent();
 83             Response.ClearHeaders();
 84             Response.AddHeader("Content-Disposition", "attachment;filename=" + fileInfo.Name);
 85             Response.AddHeader("Content-Length", fileInfo.Length.ToString());
 86             Response.AddHeader("Content-Transfer-Encoding", "binary");
 87             Response.ContentType = "application/octet-stream";
 88             Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
 89             Response.WriteFile(fileInfo.FullName);
 90             Response.Flush();
 91             string tempPath = file.Substring(0, file.LastIndexOf(".rar"));
 92             //删除临时目录下的所有文件
 93             DeleteFiles(tempPath);
 94             //删除空目录
 95             Directory.Delete(tempPath);
 96             //删除压缩文件
 97             File.Delete(file);
 98 
 99             Response.End();
100         }
101 
102 
103         /// <summary>
104         /// 删除临时目录下的所有文件
105         /// </summary>
106         /// <param name="tempPath">临时目录路径</param>
107         private void DeleteFiles(string tempPath)
108         {
109             DirectoryInfo directory = new DirectoryInfo(tempPath);
110             try
111             {
112                 foreach (FileInfo file in directory.GetFiles())
113                 {
114                     if (file.Attributes.ToString().IndexOf("ReadOnly") != -1)
115                     {
116                         file.Attributes = FileAttributes.Normal;
117                     }
118                     File.Delete(file.FullName);
119                 }
120             }
121             catch (Exception)
122             {
123                 throw;
124             }
125         }
126 
127     }
128 }

 

posted @ 2016-08-19 10:08  殇琉璃  阅读(351)  评论(0)  编辑  收藏  举报