首页 > 代码库 > 网络文件操作

网络文件操作

2024-07-17 13:46:50   223人阅读

0、获取网络IP、端口：

            NameValueCollection nameValueTable = new NameValueCollection();            if (ApplicationDeployment.IsNetworkDeployed)            {                string queryString = ApplicationDeployment.CurrentDeployment.ActivationUri.Query;                nameValueTable = HttpUtility.ParseQueryString(queryString);            }

 nameValueTable["IP"];

1、获取网络文件大小：

                HttpWebRequest httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);                httpWebRequest.Method = "GET";                httpWebRequest.KeepAlive = false;                httpWebRequest.AllowAutoRedirect = true;                httpWebRequest.Referer = url.Substring(0, url.LastIndexOf("/") + 1);                httpWebRequest.UserAgent = "Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 5.2;)";                WebResponse webResponse = httpWebRequest.GetResponse();                Int64 fileSize = webResponse.ContentLength;                webResponse.Close();                httpWebRequest.Abort();                httpWebRequest = null;

 2、下载文件

　　　　　　　　　Byte[] bytes = new Byte[this.bufferSize];            　　Int32 readBytes = 0;            　　FileStream fs = new FileStream(threadFileName[currentThreadIndex], FileMode.Create, FileAccess.Write);          
                HttpWebRequest httpWebRequest = (HttpWebRequest)HttpWebRequest.Create(url);                httpWebRequest.Method = "GET";                httpWebRequest.KeepAlive = false;                httpWebRequest.AllowAutoRedirect = true;                httpWebRequest.Referer = url.Substring(0, url.LastIndexOf("/") + 1);                httpWebRequest.UserAgent = "Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 5.2;)";                //接收的起始位置及接收的长度                httpWebRequest.AddRange(Convert.ToInt32(threadFileStart[currentThreadIndex]), Convert.ToInt32(threadFileStart[currentThreadIndex] + threadFileSize[currentThreadIndex] - 1));                WebResponse webResponse = httpWebRequest.GetResponse();                Stream stream = webResponse.GetResponseStream();//获得接收流                readBytes = stream.Read(bytes, 0, this.bufferSize);                while (readBytes > 0)                {                    fs.Write(bytes, 0, readBytes);                    readBytes = stream.Read(bytes, 0, this.bufferSize);                }                fs.Flush();                fs.Close();                fs.Dispose();                stream.Close();                stream.Dispose();                webResponse.Close();                httpWebRequest.Abort();                httpWebRequest = null;

 3、合并文件（一般要加锁（Lock））

 　　　　　　　　　　　 FileStream fs = new FileStream(destinationFileFullName, FileMode.Append, FileAccess.Write);                    FileStream fsTemp = null;                    Int32 readBytes;                    Byte[] bytes = new Byte[this.bufferSize];                    for (Int32 idx = 1; idx < threadCount; idx++) //从第二个线程接收的临时文件开始合并                    {                        fsTemp = new FileStream(threadFileName[idx], FileMode.Open, FileAccess.Read);                        readBytes = fsTemp.Read(bytes, 0, this.bufferSize);                        while (readBytes > 0)                        {                            fs.Write(bytes, 0, readBytes);                            readBytes = fsTemp.Read(bytes, 0, this.bufferSize);                        }                        fsTemp.Close();                        File.Delete(threadFileName[idx]);                    }                    fs.Close();                    fs.Dispose();

 


联系
我们