internal void AsyncComputeHashCallback(IAsyncResult result)
{
int bytesRead = inputStream.EndRead(result);
//检查是否到达流末尾
if (inputStream.Position < inputStream.Length)
{
//输出进度
string pro = string.Format("{0:0.00}", ((double)inputStream.Position / inputStream.Length) * 100);
AsyncCheckProgress?.Invoke(new AsyncCheckEventArgs(AsyncCheckState.Checking, pro));
var output = new byte[buffer.Length];
//分块计算哈希值
hashAlgorithm.TransformBlock(buffer, 0, buffer.Length, output, 0);
//异步读取下一分块
inputStream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(AsyncComputeHashCallback), null);
return;
}
else
{
//计算最后分块哈希值
hashAlgorithm.TransformFinalBlock(buffer, 0, bytesRead);
}
string md5 = BitConverter.ToString(hashAlgorithm.Hash).Replace("-", "");
AsyncCheckProgress?.Invoke(new AsyncCheckEventArgs(AsyncCheckState.Completed, md5));
//关闭流
inputStream.Close();
}
private void MD5Checker_AsyncCheckProgress(AsyncCheckEventArgs e)
{
AsyncCheckProgress?.Invoke(this, e);
}
