下载

/// 
/// 下载文件/// 
/// 下载文件地址/// 下载后另存为（全路径）private bool DownloadFile(string URL, string filename){    try    {        System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest) System.Net.HttpWebRequest.Create(URL);        System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse) Myrq.GetResponse();        System.IO.Stream st = myrp.GetResponseStream();        System.IO.Stream so = new System.IO.FileStream(filename, System.IO.FileMode.Create);        byte[] by = new byte[1024];        int osize = st.Read(by, 0, (int) by.Length);        while (osize > 0)        {            so.Write(by, 0, osize);            osize = st.Read(by, 0, (int) by.Length);        }        so.Close();        st.Close();        myrp.Close();        Myrq.Abort();        return true;    }    catch (System.Exception e)    {        return false;    }}

解压Zip文件

下面代码主要用到了SharpZipLib的库

private string UnZip(string entryname, ZipFile zf){    var cover = zf.GetEntry(entryname);    if (cover == null)    {        return null;    }    string filepath = System.AppDomain.CurrentDomain.BaseDirectory + @"pic\";    string filename = DateTime.Now.ToString("yyyyMMddHHmmssfff") + "." + RY.Common.DirectoryAndFile.GetFileExt(entryname);    string name = filepath + filename;    using (FileStream writer = System.IO.File.Create(name)) //解压后的文件    {        var stream = zf.GetInputStream(cover);        int bufferSize = 1024 * 2; //缓冲区大小        int readCount = 0; //读入缓冲区的实际字节        byte[] buffer = new byte[bufferSize];        readCount = stream.Read(buffer, 0, bufferSize);        while (readCount > 0)        {            writer.Write(buffer, 0, readCount);            readCount = stream.Read(buffer, 0, bufferSize);        }        writer.Close();    }    return "pic/" + filename;}