C#网络上下载各种文件保存到本地


/// <summary>

/// 从URL地址下载文件到本地磁盘

/// </summary>

/// <param name="ToLocalPath">本地磁盘地址</param>

/// <param name="Url">URL网址</param>

/// <returns></returns>

public static long SaveFileFromUrl(string FileName, string Url)

{

long Value = 0;
WebResponse response = null;

Stream stream = null;

try

{

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

response = request.GetResponse();

stream = response.GetResponseStream();

if (!response.ContentType.ToLower().StartsWith("text/"))

{

SaveBinaryFile(response, FileName);

Value = response.ContentLength;

}

}

catch (Exception err)

{

Value = 0;

string aa = err.ToString();

}

return Value;

}

/// <summary>

/// Save a binary file to disk.

/// </summary>

/// <param name="response">The response used to save the file</param>

// 将二进制文件保存到磁盘

private static bool SaveBinaryFile(WebResponse response, string FileName)

{

bool Value = true;

byte[] buffer = new byte[1024];

try

{

if (File.Exists(FileName))

File.Delete(FileName);

Stream outStream = System.IO.File.Create(FileName);

Stream inStream = response.GetResponseStream();

int l;

do

{

l = inStream.Read(buffer, 0, buffer.Length);

if (l > 0)

outStream.Write(buffer, 0, l);

}

while (l > 0);

outStream.Close();

inStream.Close();

}

catch

{

Value = false;

}

return Value;

}