如何为一行c#代码设置超时
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How to set timeout for a line of c# code
提问by Hossein
Possible Duplicate:
Set timeout to an operation
可能的重复：
为操作设置超时
How can i set timeout for a line of code in c#.
For example
RunThisLine(SomeMethod(Some Input), TimeSpan.FromSeconds(10))run SomeMethodwith 10 second time out.
Thanks in advance.
如何在 C# 中为一行代码设置超时。例如
RunThisLine(SomeMethod(Some Input), TimeSpan.FromSeconds(10))运行SomeMethod10 秒超时。提前致谢。
采纳答案by Carsten
You can use the Task Parallel Library. To be more exact, you can use Task.Wait(TimeSpan):
您可以使用任务并行库。更准确地说，您可以使用 Task.Wait(TimeSpan)：
using System.Threading.Tasks;
var task = Task.Run(() => SomeMethod(input));
if (task.Wait(TimeSpan.FromSeconds(10)))
return task.Result;
else
throw new Exception("Timed out");
回答by paul
I use something like this (you should add code to deal with the various fails):
我使用这样的东西（你应该添加代码来处理各种失败）：
var response = RunTaskWithTimeout<ReturnType>(
(Func<ReturnType>)delegate { return SomeMethod(someInput); }, 30);
/// <summary>
/// Generic method to run a task on a background thread with a specific timeout, if the task fails,
/// notifies a user
/// </summary>
/// <typeparam name="T">Return type of function</typeparam>
/// <param name="TaskAction">Function delegate for task to perform</param>
/// <param name="TimeoutSeconds">Time to allow before task times out</param>
/// <returns></returns>
private T RunTaskWithTimeout<T>(Func<T> TaskAction, int TimeoutSeconds)
{
Task<T> backgroundTask;
try
{
backgroundTask = Task.Factory.StartNew(TaskAction);
backgroundTask.Wait(new TimeSpan(0, 0, TimeoutSeconds));
}
catch (AggregateException ex)
{
// task failed
var failMessage = ex.Flatten().InnerException.Message);
return default(T);
}
catch (Exception ex)
{
// task failed
var failMessage = ex.Message;
return default(T);
}
if (!backgroundTask.IsCompleted)
{
// task timed out
return default(T);
}
// task succeeded
return backgroundTask.Result;
}
回答by Mo Patel
You can use the IAsyncResult and Action class/interface to achieve this.
您可以使用 IAsyncResult 和 Action 类/接口来实现这一点。
public void TimeoutExample()
{
IAsyncResult result;
Action action = () =>
{
// Your code here
};
result = action.BeginInvoke(null, null);
if (result.AsyncWaitHandle.WaitOne(10000))
Console.WriteLine("Method successful.");
else
Console.WriteLine("Method timed out.");
}
