单项选择题 You are creating a Windows Forms application by using the .NET Framework 3.5 The application requires a form to display a clock.You need to create a circular form to display the clock. Which code segment should you use?()
单项选择题 YouarecreatingaWindowsapplicationbyusingthe.NETFramework3.5.YoucreateaninstanceoftheBackgroundWorkercomponentnamedbackgroundWorker1toasynchronouslyprocesstimeconsumingreportsintheapplication.Youwritethefollowingcodesegmentintheapplication(Linenumbersareincludedforreferenceonly.) Youneedtowriteacodesegmentthatreportstotheapplicationwhenthebackgroundprocessdetectsanyofthefollowingactions: (1)Anexceptionisthrown (2)Theprocessiscancelled (3)Theprocessissuccessfullycompleted Whichcodesegmentshouldyouinsert?()
单项选择题 You are creating a Windows application by using the .NET Framework 3.5.You plan to create a form that might result in a timeconsuming operation.You use the QueueUserWorkItem method and a Label control named lblResult.You need to update the users by using the lblResult control when the process has completed the operation. Which code segment should you use?()