static void FinshCallBack(IAsyncResult result)
{
if (result.IsNull())
{
return;
}
ReadFileClass rf = result.AsyncState as ReadFileClass;
int length = rf.stream.EndRead(result);
byte[] fileData = new byte[length];
Array.Copy(rf.data, fileData, fileData.Length);
string content = Encoding.UTF8.GetString(fileData);
Thread.Sleep(3 * 1000);
Console.WriteLine("读取文件结束：文件长度为[{0}]，文件内容为[{1}]", length.ToString(), content);
}
static void Main22()
{
if (File.Exists(testFile))
{
File.Delete(testFile);
}
using (Stream stream = File.Create(testFile))
{
string content = "我是文件具体内容，我是不是帅得掉渣？";
byte[] contentByte = Encoding.UTF8.GetBytes(content);
stream.Write(contentByte, 0, contentByte.Length);
}
using (Stream stream = new FileStream(testFile, FileMode.Open, FileAccess.Read, FileShare.Read, bufferSize, FileOptions.Asynchronous))
{
byte[] data = new byte[bufferSize];
ReadFileClass rf = new ReadFileClass(stream, data);
IAsyncResult result = stream.BeginRead(data, 0, data.Length, FinshCallBack, rf);
//Thread.Sleep(3 * 1000);
Console.WriteLine("主线程执行完毕，按回车键退出程序");
}
Console.ReadKey();
}