我有一种使用对称加密来加密和解密数据的算法。无论如何,当我要解密时,我有:
CryptoStream cs = new CryptoStream(ms, cryptoTransform, CryptoStreamMode.Read);
我必须从cs CryptoStream读取数据并将该数据放入一个字节数组中。所以一种方法可能是:
System.Collections.Generic.List<byte> myListOfBytes = new System.Collections.Generic.List<byte>();
while (true)
{
int nextByte = cs.ReadByte();
if (nextByte == -1) break;
myListOfBytes.Add((Byte)nextByte);
}
return myListOfBytes.ToArray();
另一种技术可能是:
ArrayList chuncks = new ArrayList();
byte[] tempContainer = new byte[1048576];
int tempBytes = 0;
while (tempBytes < 1048576)
{
tempBytes = cs.Read(tempContainer, 0, tempContainer.Length);
//tempBytes is the number of bytes read from cs stream. those bytes are placed
// on the tempContainer array
chuncks.Add(tempContainer);
}
// later do a for each loop on chunks and add those bytes
我事先无法知道cs的长度:
或者我应该实现我的堆栈类。我将加密大量信息,因此使代码高效将节省大量时间
答案 0 :(得分:52)
你可以阅读大块的内容:
using (var stream = new MemoryStream())
{
byte[] buffer = new byte[2048]; // read in chunks of 2KB
int bytesRead;
while((bytesRead = cs.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, bytesRead);
}
byte[] result = stream.ToArray();
// TODO: do something with the result
}
答案 1 :(得分:31)
由于您将所有内容存储在内存中,因此您只需使用MemoryStream
和CopyTo()
:
using (MemoryStream ms = new MemoryStream())
{
cs.CopyTo(ms);
return ms.ToArray();
}
CopyTo()
将需要.NET 4