asp.net 映射网络文件服务器磁盘

近段时间公司某网站系统中存放上传文件的磁盘不够用，所以要进行web服务器和文件服务器的分离，于是在网上找了些资料进行 映射网络文件服务器磁盘。

参考资料网址：

http://www.cnblogs.com/xiaopang2010/archive/2011/10/09/2204097.html

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

 

http://www.cnblogs.com/liping13599168/archive/2007/03/12/672025.html

使用过程：

//1.在A文件服务器上建立账号 test testnetdist,创建共享文件夹 download ，并在安全中添加 test账号 修改权限。test为user组。
//2.在B web服务器上建立账号 test testnetdist。 test为user组。
//3.修改程序中 上传 ，下载 代码。
//测试问题

 //1.不是有效网络路径
//2.登录失败
 //出现这些问题时，可能是代码中传递的参数问题。
//解决方法是 通过 我的电脑---》右键映射网络驱动器 来测试 参数。

 

测试代码为：

protected void Page_Load(object sender, EventArgs e)
        {
            LogonImpersonate imper = new LogonImpersonate("test", "testnetdist");
            uint state = 0;
            if (!Directory.Exists("Z:"))
            {
                state = WNetHelper.WNetAddConnection(@"test", "testnetdist", @"\\192.168.0.1\download", "Z:");
            }
            if (state.Equals(0))
            {
                this.ResponseFile(Page.Request, Page.Response, "201206笔记.txt", @"Z:\201206笔记.txt", 1024000);
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {

            //失败
            //string localpath = "Z:";
            //int status = NetworkConnection.Connect(@"\\192.168.0.1\download", localpath, @"test", "testnetdist");
            ////if (status == (int)ERROR_ID.ERROR_SUCCESS)
            ////{
            //    this.fileupload1.PostedFile.SaveAs("Z:\\" + this.fileupload1.FileName);    //保存文件地址
            ////}
            //NetworkConnection.Disconnect(localpath);

            //成功

            LogonImpersonate imper = new LogonImpersonate("test", "testnetdist");

            if (WNetHelper.CreateDirectory(@"Z:\"))
            {
                this.fileupload1.PostedFile.SaveAs(@"Z:\" + this.fileupload1.FileName);
            }

           //失败

            //System.Diagnostics.Process.Start("cmd ", @"net use \\192.168.0.1\download testnetdist /user:test");
            //this.fileupload1.PostedFile.SaveAs(@"\\192.168.0.1\download\" + this.fileupload1.FileName);
        }
        public bool ResponseFile(HttpRequest _Request, HttpResponse _Response, string _fileName, string _fullPath, long _speed)
        {
            try
            {
                FileStream myFile = new FileStream(_fullPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                BinaryReader br = new BinaryReader(myFile);
                try
                {
                    _Response.AddHeader("Accept-Ranges", "bytes");
                    _Response.Buffer = false;
                    long fileLength = myFile.Length;
                    long startBytes = 0;

                    double pack = 10240; //10K bytes
                    //int sleep = 200;   //每秒5次   即5*10K bytes每秒
                    int sleep = (int)Math.Floor(1000 * pack / _speed) + 1;
                    if (_Request.Headers["Range"] != null)
                    {
                        _Response.StatusCode = 206;
                        string[] range = _Request.Headers["Range"].Split(new char[] { '=', '-' });
                        startBytes = Convert.ToInt64(range[1]);
                    }
                    _Response.AddHeader("Content-Length", (fileLength - startBytes).ToString());
                    if (startBytes != 0)
                    {
                        //Response.AddHeader("Content-Range", string.Format(" bytes {0}-{1}/{2}", startBytes, fileLength-1, fileLength));
                    }
                    _Response.AddHeader("Connection", "Keep-Alive");
                    _Response.ContentType = "application/octet-stream";
                    _Response.AddHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(_fileName, System.Text.Encoding.UTF8));

                    br.BaseStream.Seek(startBytes, SeekOrigin.Begin);
                    int maxCount = (int)Math.Floor((fileLength - startBytes) / pack) + 1;

                    for (int i = 0; i < maxCount; i++)
                    {
                        if (_Response.IsClientConnected)
                        {
                            _Response.BinaryWrite(br.ReadBytes(int.Parse(pack.ToString())));
                            Thread.Sleep(sleep);
                        }
                        else
                        {
                            i = maxCount;
                        }
                    }
                }
                catch
                {
                    return false;
                }
                finally
                {
                    br.Close();

                    myFile.Close();
                }
            }
            catch
            {
                return false;
            }
            return true;
        }