C# 下载方法

来源：互联网发布：php get传递参数编辑：程序博客网时间：2024/06/03 17:59

/// <summary>

/// 下载文件

/// </summary>

/// <param name="strFileUrl">源路径</param>

/// <param name="strSaveTempPath">下载保存路径</param>

/// <returns></returns>

public long DownLoadFile(string strFileUrl, string strSaveTempPath)

{

long intSize = 0;

try

{

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strFileUrl);

request.Method = "GET";

request.Accept = "*/*";

//request.ContentType = "*/*";

request.KeepAlive = true;

request.Timeout = 3000000;

request.AllowAutoRedirect = true;

request.Referer = "http://bbs.locojoy.com";

request.UserAgent =

"Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; EmbeddedWB 14.52 from: http://www.bsalsa.com/ EmbeddedWB 14.52; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)";

request.ReadWriteTimeout = 3000000;

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream stream = response.GetResponseStream();

CheckDirectory(strSaveTempPath, true);

FileStream fileStream = new FileStream(strSaveTempPath, FileMode.Create, FileAccess.Write);

long lLength = response.ContentLength;

long i = -4092;

decimal j = 0;

byte[] buffer = new byte[4092];

int iSize = 4092;

while (true)

{

i += iSize;

iSize = stream.Read(buffer, 0, buffer.Length);

j = Math.Round(Convert.ToDecimal((Convert.ToDouble(i) / Convert.ToDouble(lLength)) * 100), 4);

if (iSize > 0)

{

fileStream.Write(buffer, 0, iSize);

//System.Threading.Thread.Sleep(30);

}

else

{

break;

}

stream.Close();

fileStream.Close();

response.Close();

intSize = lLength;

}

catch (Exception exception)

{

//AppLog.WriteLog("下载图片错误：" + strFileUrl + "---" + exception);

intSize = 0;

}

return intSize;

}

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