当我点击此API时,TaskCanceledException引发了无用的堆栈跟踪。我正在使用这个图书馆:https://npoi.codeplex.com/使用NPOI工作簿检索MemoryStream时引发的TaskCanceledException
public class TestController : ApiController
{
[HttpGet]
public HttpResponseMessage Test()
{
var templateWorkbook = new XSSFWorkbook();
var sheet = templateWorkbook.CreateSheet("TestSheet");
IRow dataRow = sheet.CreateRow(4);
var cell = dataRow.CreateCell(0);
cell.SetCellValue(77);
Stream memoryStream = new MemoryStream();
templateWorkbook.Write(memoryStream);
var httpResponseMessage = new HttpResponseMessage(HttpStatusCode.OK)
{
Content = new StreamContent(memoryStream)
};
httpResponseMessage.Content.Headers.ContentType = new MediaTypeHeaderValue("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
httpResponseMessage.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment") { FileName = "test.xlsx" };
return httpResponseMessage;
}
}
我在做什么错了?这是我的堆栈跟踪:
[TaskCanceledException:一个任务被取消]
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务)+ 165
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (任务 任务)+58
System.Web.Http.Owin.d__20.MoveNext()666个
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务)+137
System.Runtime.CompilerServices。 TaskAwaiter.Handle NonSuccessAndDebuggerNotification(任务 任务)+58
System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(任务task)+25 System.Web.Http.Owin.d__0.MoveNext()1814
System.Runtime.CompilerServices.TaskAwaiter .ThrowForNonSuccess(任务 任务)+137
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务)+58
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d__5.MoveNext() +187 System.Runtime .CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务)+99
System.Runtime .CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务)+58
Microsoft.Owin.Security.Infrastructure.d__0.MoveNext()561个
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务)+137
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务)+58
Microsoft.Owin.Security.Infrastructure.d__0.MoveNext()561
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务)+ 137
System.Runtime.CompilerServices.TaskAwaiter。 HandleNonSuccessAndDebuggerNotification(任务 任务)+58 Microsoft.Owin.Cors.d__0.MoveNext()+856
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务)+137
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification (任务 任务)+58
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d__5.MoveNext() +187 System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任务 任务)+99
System.Runtime.CompilerServices .TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任务 任务)+58
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.d__2.MoveNext() 185 Microsoft.Owin.Host.SystemWeb.IntegratedPipeline.StageAsyncResult.End(IAsyncResult的 AR)69
Microsoft.Owin.Host.SystemWeb.IntegratedPipeline .IntegratedPipelineContext。EndFinalWork(IAsyncResult的 AR)64
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() 380 System.Web.HttpApplication.ExecuteStep(IExecutionStep步骤,布尔& completedSynchronously)155
你能识别你的问题哪一行抛出异常? –