微软在发布VS2012的同时推出了C#5.0,其中包含了async和await
代码如下:
class Program
{
private static readonly Stopwatch watch = new Stopwatch();
static void Main(string[] args)
{
watch.Start();
const string url1 = "https://www.zhihu.com/";
const string url2 = "https://www.zhihu.com/question/269110219/answer/396519652";
Task<int> t1 = downloadurl(1, url1);
Task<int> t2 = downloadurl(2, url2);
for (int x = 0; x < 3; x++)
{
addstring(x);
}
Console.WriteLine($"{"url1"} 的字符个数:{t1.Result}");
Console.WriteLine($"{"url2"} 的字符个数:{t2.Result}");
Console.Read();
}
public static void addstring(int id)
{
var s = "";
for (int x = 0; x < 20000; x++)
{
s += x;
}
Console.WriteLine($"id = {id} 的 addstring 方法完成:{watch.ElapsedMilliseconds} ms");
}
public static async Task<int> downloadurl(int id, string adress)
{
var webclient = new WebClient();
Console.WriteLine($"开始调用 id = {id}:{watch.ElapsedMilliseconds} ms");
var result = await webclient.DownloadStringTaskAsync(adress);
Console.WriteLine($"调用完成 id = {id}:{watch.ElapsedMilliseconds} ms");
return result.Length;
}
}
未完待续。。。。。