我试图捕获在异步方法中抛出的自定义异常,但由于某种原因,它总是最终被通用异常捕获 block 捕获。请参阅下面的示例代码
class Program
{
static void Main(string[] args)
{
try
{
var t = Task.Run(TestAsync);
t.Wait();
}
catch(CustomException)
{
throw;
}
catch (Exception)
{
//handle exception here
}
}
static async Task TestAsync()
{
throw new CustomException("custom error message");
}
}
class CustomException : Exception
{
public CustomException()
{
}
public CustomException(string message) : base(message)
{
}
public CustomException(string message, Exception innerException) : base(message, innerException)
{
}
protected CustomException(SerializationInfo info, StreamingContext context) : base(info, context)
{
}
}
最佳答案
问题是 Wait
抛出一个 AggregateException
,而不是您要捕获的异常。
你可以使用这个:
try
{
var t = Task.Run(TestAsync);
t.Wait();
}
catch (AggregateException ex) when (ex.InnerException is CustomException)
{
throw;
}
catch (Exception)
{
//handle exception here
}
关于c# - 从异步方法捕获自定义异常,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/43581990/