将文件上传到网络共享服务器的方法

将文件上传到网络共享服务器的方法


1,在文件服务器上,创建一个本地帐户,比如登录名:upload,密码:upload,注意在创建的时候选择“密码永不过期”,去掉勾选“用户下次登录时须更改密码”的选项;
2,在要共享的文件夹上点右键,选择“属性”-“安全”,增加upload帐户可以写入的权限;
3,在要共享的文件夹上点右键,选择“共享”,共享此文件夹,并在“权限”按钮点击后添加帐户upload可修改;
4,在另外一台 Web 服务器上,创建登录名和密码与上面完全相同的本地帐户。
5,在web.config里,启用模拟:      

web.config里添加的代码
<identity impersonate="true" userName="upload" password="upload" />

6,在网站文件夹和Temporary ASP.NET Files文件夹上设置帐户upload读写权限
7,在ASP.NET的上传文件里写:

C# 代码
protected void Button1_Click(object sender, EventArgs e)
{
  string fileName = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
  FileUpload1.SaveAs(@"\\192.168.3.1\free\" + fileName);
}

8,显示上传的文件:
在IIS里创建虚拟目录,指向“另一台计算机上的共享”,“连接为”输入上面创建的帐户名和密码。即可以http://www.mengxianhui.com/upload/hello.jpg进行访问。

注意:在VS里面直接运行可能会报告
Could not load file or assembly 'WebApplication1' or one of its dependencies. 拒绝访问。
这是因为你模拟的帐户没有权限导致的,你可以发布到IIS看效果。

 下面是一段使用程序进行模拟的方法,出自 http://2leggedspider.wordpress.com/2007/05/28/upload-files-to-unc-share-using-asp-net/

C# 代码

using System.Security.Principal;
using System.Runtime.InteropServices;

namespace FileUploadUNCShare
{
    public partial class _Default : System.Web.UI.Page
    {

        public const int LOGON32_LOGON_INTERACTIVE = 2;
        public const int LOGON32_PROVIDER_DEFAULT = 0;

        WindowsImpersonationContext impersonationContext;

        [DllImport("advapi32.dll")]
        public static extern int LogonUserA(String lpszUserName,
            String lpszDomain,
            String lpszPassword,
            int dwLogonType,
            int dwLogonProvider,
            ref IntPtr phToken);
        [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern int DuplicateToken(IntPtr hToken,
            int impersonationLevel,
            ref IntPtr hNewToken);

        [DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        public static extern bool RevertToSelf();

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern bool CloseHandle(IntPtr handle);

        private bool ImpersonateUser(String userName, String domain, String password)
        {
            WindowsIdentity tempWindowsIdentity;
            IntPtr token = IntPtr.Zero;
            IntPtr tokenDuplicate = IntPtr.Zero;

            if (RevertToSelf())
            {
                if (LogonUserA(userName, domain, password, LOGON32_LOGON_INTERACTIVE,
                    LOGON32_PROVIDER_DEFAULT, ref token) != 0)
                {
                    if (DuplicateToken(token, 2, ref tokenDuplicate) != 0)
                    {
                        tempWindowsIdentity = new WindowsIdentity(tokenDuplicate);
                        impersonationContext = tempWindowsIdentity.Impersonate();
                        if (impersonationContext != null)
                        {
                            CloseHandle(token);
                            CloseHandle(tokenDuplicate);
                            return true;
                        }
                    }
                }
            }
            if (token != IntPtr.Zero)
                CloseHandle(token);
            if (tokenDuplicate != IntPtr.Zero)
                CloseHandle(tokenDuplicate);
            return false;
        }

        private void UndoImpersonation()
        {
            impersonationContext.Undo();
        }

        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            if (ImpersonateUser("upload", "", "upload"))
            {

                if ((FileUpload1.PostedFile != null) && (FileUpload1.PostedFile.ContentLength &gt; 0))
                {
                    string fileName = System.IO.Path.GetFileName(FileUpload1.PostedFile.FileName);
                    string folderPath = @"\\MyUNCShare\MyFolder\";

                    string locationToSave = folderPath + "\\" + fileName;
                    try
                    {
                        FileUpload1.PostedFile.SaveAs(locationToSave);
                        Response.Write("The file has been uploaded.");
                    }
                    catch (Exception ex)
                    {
                        Response.Write("Error: " + ex.Message);
                    }
                }
                else
                {
                    Response.Write("Please select a file to upload.");
                }

                UndoImpersonation();
            }
            else
            {
                Response.Write("Failed");
            }

        }
    }
}
 

前面的文章,我提供了一种”将文件上传到网络共享服务器的方法“,这次,我们采用FTP的方法将文件上传到另外一台服务器上。
首先,在另外一台服务器上设置好FTP服务,并创建好允许上传的用户和密码,然后,在ASP.NET里就可以直接将文件上传到这台 FTP 服务器上了。代码如下:

ASPX 代码
<%@ Page Language="C#" EnableViewState="false"%>

<%@ Import Namespace="System.Net" %>
<%@ Import Namespace="System.IO" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
  protected void Button1_Click(object sender, EventArgs e)
  {
    //要接收文件的 ftp 服务器地址
    String serverUri = "ftp://192.168.3.1/";
    String fileName = Path.GetFileName(FileUpload1.FileName);
    serverUri += fileName;   
    
    FtpWebRequest request = (FtpWebRequest)WebRequest.Create(serverUri);
    request.Method = WebRequestMethods.Ftp.AppendFile;
    request.UseBinary = true;
    request.UsePassive = true;
    
    // ftp 服务器上允许上传的用户名和密码
    request.Credentials = new NetworkCredential("upload", "upload");
    Stream requestStream = request.GetRequestStream();
    Byte[] buffer = FileUpload1.FileBytes;

    requestStream.Write(buffer, 0, buffer.Length);
    requestStream.Close();
    FtpWebResponse response = (FtpWebResponse)request.GetResponse();
    Label1.Text = response.StatusDescription;
    response.Close();
  }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title>孟宪会之将文件上传到另外一个服务器的方法二</title>
</head>
<body>
  <form id="form1" runat="server">
  <asp:FileUpload ID="FileUpload1" runat="server" />
  <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="上传文件" />
  <div><asp:Label ID="Label1" runat="server" Text=""></asp:Label></div>
  </form>
</body>
</html>

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