本文整理匯總了C#中System.AggregateException類的典型用法代碼示例。如果您正苦於以下問題：C# AggregateException類的具體用法？C# AggregateException怎麽用？C# AggregateException使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
AggregateException類屬於System命名空間，在下文中一共展示了AggregateException類的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: Main
//引入命名空間
using System;
using System.IO;
using System.Threading.Tasks;
class Example
{
static async Task Main(string[] args)
{
// Get a folder path whose directories should throw an UnauthorizedAccessException.
string path = Directory.GetParent(
Environment.GetFolderPath(
Environment.SpecialFolder.UserProfile)).FullName;
// Use this line to throw UnauthorizedAccessException, which we handle.
Task<string[]> task1 = Task<string[]>.Factory.StartNew(() => GetAllFiles(path));
// Use this line to throw an exception that is not handled.
// Task task1 = Task.Factory.StartNew(() => { throw new IndexOutOfRangeException(); } );
try
{
await task1;
}
catch (UnauthorizedAccessException ae)
{
Console.WriteLine("Caught unauthorized access exception-await behavior");
}
catch (AggregateException ae)
{
Console.WriteLine("Caught aggregate exception-Task.Wait behavior");
ae.Handle((x) =>
{
if (x is UnauthorizedAccessException) // This we know how to handle.
{
Console.WriteLine("You do not have permission to access all folders in this path.");
Console.WriteLine("See your network administrator or try another path.");
return true;
}
return false; // Let anything else stop the application.
});
}
Console.WriteLine("task1 Status: {0}{1}", task1.IsCompleted ? "Completed," : "",
task1.Status);
}
static string[] GetAllFiles(string str)
{
// Should throw an UnauthorizedAccessException exception.
return System.IO.Directory.GetFiles(str, "*.txt", System.IO.SearchOption.AllDirectories);
}
}
// The example displays the following output if the file access task is run:
// You do not have permission to access all folders in this path.
// See your network administrator or try another path.
// task1 Status: Completed,Faulted
// It displays the following output if the second task is run:
// Unhandled Exception: System.AggregateException: One or more errors occurred. ---
// > System.IndexOutOfRangeException: Index was outside the bounds of the array.
// at Example.<Main>b__0()
// at System.Threading.Tasks.Task.Execute()
// --- End of inner exception stack trace ---
// at System.AggregateException.Handle(Func`2 predicate)
// at Example.Main(String[] args)