117笔记问答在C#中，Task类是用于表示异步操作的一种方式
- 创建并启动一个简单的任务：
using System;
using System.Threading.Tasks;
class Program
{
static void Main(string[] args)
{
Task task = Task.Run(() =>
{
Console.WriteLine("Running a task on a separate thread.");
});
// 等待任务完成
task.Wait();
}
}
- 使用
async和await关键字处理异步方法：
using System;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
await RunAsyncTask();
}
static async Task RunAsyncTask()
{
await Task.Run(() =>
{
Console.WriteLine("Running an asynchronous task on a separate thread.");
});
}
}
- 处理多个并发任务：
using System;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
Task task1 = Task.Run(() =>
{
Console.WriteLine("Running task 1 on a separate thread.");
});
Task task2 = Task.Run(() =>
{
Console.WriteLine("Running task 2 on a separate thread.");
});
// 等待所有任务完成
await Task.WhenAll(task1, task2);
}
}
- 处理任务返回值：
using System;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
Task task = Task.Run(() =>
{
Console.WriteLine("Running a task with return value on a separate thread.");
return 42;
});
int result = await task;
Console.WriteLine($"The result is: {result}");
}
}
- 处理多个并发任务并获取结果：
using System;
using System.Linq;
using System.Threading.Tasks;
class Program
{
static async Task Main(string[] args)
{
Task[] tasks = new[]
{
Task.Run(() =>
{
Console.WriteLine("Running task 1 on a separate thread.");
return 1;
}),
Task.Run(() =>
{
Console.WriteLine("Running task 2 on a separate thread.");
return 2;
})
};
// 等待所有任务完成并获取结果
int[] results = await Task.WhenAll(tasks);
Console.WriteLine($"The results are: {string.Join(", ", results)}");
}
}
这些示例展示了如何使用C# Task类处理并发任务。请注意，为了确保代码的可读性和可维护性，建议使用async和await关键字来处理异步操作。