1.需下载和引用文件“ICSharpCode.SharpZipLib.dll“。下载地址“https://download.csdn.net/download/njxiaogui/8251031”。
2.压缩代码的方法
/// <summary>
/// 压缩单个文件
/// </summary>
/// <param name="fileToZip">要压缩的文件</param>
/// <param name="zipedFile">压缩后的文件全名</param>
/// <param name="compressionLevel">压缩程度,范围0-9,数值越大,压缩程序越高</param>
/// <param name="blockSize">分块大小</param>
public void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize)
{
if (!System.IO.File.Exists(fileToZip))//如果文件没有找到,则报错
{
throw new FileNotFoundException("The specified file " + fileToZip + " could not be found. Zipping aborderd");
}
FileStream streamToZip = new FileStream(fileToZip, FileMode.Open, FileAccess.Read);
FileStream zipFile = File.Create(zipedFile);
ZipOutputStream zipStream = new ZipOutputStream(zipFile);
ZipEntry zipEntry = new ZipEntry(fileToZip);
zipStream.PutNextEntry(zipEntry);
zipStream.SetLevel(compressionLevel);
byte[] buffer = new byte[blockSize];
int size = streamToZip.Read(buffer, 0, buffer.Length);
zipStream.Write(buffer, 0, size);
try
{
while (size < streamToZip.Length)
{
int sizeRead = streamToZip.Read(buffer, 0, buffer.Length);
zipStream.Write(buffer, 0, sizeRead);
size += sizeRead;
}
}
catch (Exception ex)
{
GC.Collect();
throw ex;
}
zipStream.Finish();
zipStream.Close();
streamToZip.Close();
GC.Collect();
}
3.调用方法。
ZipUtility zip = new ZipUtility();
zip.ZipFile(vidurl, vidrar, 5, 10);
// 该方法中 vidurl 为 要压缩的绝对路径
// vidrar 为压缩文件所存放的路劲
4.总结,该方法可以实现文件的在线压缩,方便用户下载不能直接下载的文件,比如视频,音频文件等。