C# 通過HttpWebRequest 建立串連擷取檔案大小 判斷Http類型的檔案是否存在

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 1 public void DisposeReportData(SynFileInfo item) 2         { 3             MReport report = new MReport(); 4             report.檔案名稱 = item.DocName; 5             report.URL = item.DownPath; 6             HttpWebRequest request = null; 7             HttpWebResponse response = null; 8             try 9             {10                 request = WebRequest.Create(item.DownPath) as HttpWebRequest;11                 request.Proxy = null;//不使用代理 .NET4.0中的預設代理是開啟的12                 request.KeepAlive = false;//不建立持久性串連13                 request.Timeout = 5000;//串連網址的逾時時間14                 request.ReadWriteTimeout = 5000;//讀取網址內容的逾時時間      15                 response = request.GetResponse() as HttpWebResponse;16                 long length = response.ContentLength;17                 string size = FileOperate.GetAutoSizeString(length, 2);18                 report.大小 = size;19                 report.串連狀態 = "有 效";20             }21             catch (WebException webEx)22             {23                 report.大小 = "0 MB";24                 report.串連狀態 = "無 效";25                 Console.WriteLine("請求的檔案不存在!" + webEx.Message);26             }27             finally28             {29                 lock (ConfigReader.ReportData)30                 {31                     ConfigReader.ReportData.Add(report);32                 }33                 if (response != null)34                 {35                     response.Close();//關閉串連36                 }37                 if (request != null)38                 {39                     request.Abort();//中止請求40                 }41                 request = null;42                 response = null;43                 System.GC.Collect();//強制記憶體回收,並釋放資源44 45             }46         }

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 WebRequest多線程 逾時問題

System.Net.ServicePointManager.DefaultConnectionLimit = 20;//最大並發數，.net預設並發只有2個

 

C# 通過HttpWebRequest 建立串連擷取檔案大小 判斷Http類型的檔案是否存在