Exception C#WP8处理异步调用异常
我已经搜索了很长时间,但似乎找不到代码的解决方案。 当异常进入Exception C#WP8处理异步调用异常,exception,asynchronous,windows-phone-8,call,Exception,Asynchronous,Windows Phone 8,Call,我已经搜索了很长时间,但似乎找不到代码的解决方案。 当异常进入if(e.Error!=null)条件时,换句话说,当异步调用发生错误时,如何处理异常 private static StorageClient client = new StorageClient(); private static void TransferCompletion<T>(TaskCompletionSource<T> tcs, System.ComponentModel.AsyncCompl
if(e.Error!=null)
条件时,换句话说,当异步调用发生错误时,如何处理异常
private static StorageClient client = new StorageClient();
private static void TransferCompletion<T>(TaskCompletionSource<T> tcs, System.ComponentModel.AsyncCompletedEventArgs e, Func<T> getResult)
{
if (e.Error != null)
{
MessageBox.Show("1");
tcs.TrySetException(e.Error);
}
else if (e.Cancelled)
{
MessageBox.Show("2");
tcs.TrySetCanceled();
}
else
{
MessageBox.Show("3");
tcs.TrySetResult(getResult());
}
}
public static Task<getAllProvidersCompletedEventArgs> GetAllProvidersTask(this StorageClient client)
{
var tcs = new TaskCompletionSource<getAllProvidersCompletedEventArgs>();
client.getAllProvidersCompleted += (s, e) => TransferCompletion(tcs, e, () => e);
client.getAllProvidersAsync();
return tcs.Task;
}
我按照以下示例编写代码:在包含
wait
表达式的语句周围添加try
块:
try
{
var client = new StorageClient();
var providers_data = await client.GetAllProvidersTask();
}
catch (Exception ex)
{
...
throw;
}
是的,我已经试过了,而且很有效。但这里的问题是,我仍然从VisualStudio收到警告,说有一个异常来自于
var providers\u data=wait client.GetAllProvidersTask()行代码>未由用户处理。下图:如何解决这个问题?我没有太多的WP经验,但我会尝试调试->异常并取消选中所有“抛出”框。
try
{
var client = new StorageClient();
var providers_data = await client.GetAllProvidersTask();
}
catch (Exception ex)
{
...
throw;
}