exception

问题 In a relatively simple block of code that checks an API endpoint (determining connection state), I rely on a try..catch as the mechanism to validate if the application can communicate with the server. The issue I'm having is that while debugging, the debugger always stops on the connection line (when the application is offline) even though I am handling the errors internally. Future<bool> isOnline() async { try { // VSCode debugger always stops on this line when no connection await http .get(

问题 In a relatively simple block of code that checks an API endpoint (determining connection state), I rely on a try..catch as the mechanism to validate if the application can communicate with the server. The issue I'm having is that while debugging, the debugger always stops on the connection line (when the application is offline) even though I am handling the errors internally. Future<bool> isOnline() async { try { // VSCode debugger always stops on this line when no connection await http .get(

问题 How to globally handle application level exceptions for client-side Blazor apps? 回答1: You can create a singleton service that handles the WriteLine event. This will be fired only on errors thanks to Console.SetError(this); public class ExceptionNotificationService : TextWriter { private TextWriter _decorated; public override Encoding Encoding => Encoding.UTF8; public event EventHandler<string> OnException; public ExceptionNotificationService() { _decorated = Console.Error; Console.SetError

问题 I am wondering if there is any difference between the MIPS syscall and trap instructions. I can't find anything involving this, so I am not sure if there is a difference. Traps seem to just be a conditional syscall, but some clarifying can be helpful. 回答1: The SYSCALL and TRAP instructions both trigger exceptions, but the resulting exception is of a different type (SystemCall versus Trap), and the operating system will likely handle them differently. 回答2: A Trap is an exception switches to

问题 I am wondering if there is any difference between the MIPS syscall and trap instructions. I can't find anything involving this, so I am not sure if there is a difference. Traps seem to just be a conditional syscall, but some clarifying can be helpful. 回答1: The SYSCALL and TRAP instructions both trigger exceptions, but the resulting exception is of a different type (SystemCall versus Trap), and the operating system will likely handle them differently. 回答2: A Trap is an exception switches to

问题 I have an apache camel rest api which downloads a file from S3. I send json input (key, bucketname, accessKey, secretKey, region) in order to write the URI. The code looks like this: public static class HelloRoute extends RouteBuilder { @Override public void configure() { rest("/") .post("file-from-s3") .route() .setHeader(AWS2S3Constants.KEY, key) .to("aws2-s3://bucketname?accessKey=INSERT&secretKey=INSERT&region=INSERT&operation=getObject") .endRest(); } } I am able to get the respective

问题 I have recently began learning C++ coming from a C# background. My problem is with the way exceptions get handled. If I have a nullptr somewhere, resulting in reading from a forbidden location, then I get a nice looking callstack in VS like this: However if I throw my own exception, or an assertion fails, then I do not get any clue as of what went wrong. VS just shows an error window: A: This is kind of uncomfortable for me as in C# I would get a stacktrace in both case. Is there a way to

问题 I have recently began learning C++ coming from a C# background. My problem is with the way exceptions get handled. If I have a nullptr somewhere, resulting in reading from a forbidden location, then I get a nice looking callstack in VS like this: However if I throw my own exception, or an assertion fails, then I do not get any clue as of what went wrong. VS just shows an error window: A: This is kind of uncomfortable for me as in C# I would get a stacktrace in both case. Is there a way to

问题 The super obvious way is to add reference to System.web I did that. It doesn't work. 回答1: Add a reference to System.Web.Extensions http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx Namespace: System.Web.Script.Serialization Assembly: System.Web.Extensions (in System.Web.Extensions.dll) 回答2: How to add System.Web.Extensions in Visual Studio 2012: Right-click your project. Click "Properties" Click the "References" tab on the left. Click the "Add"

问题 The super obvious way is to add reference to System.web I did that. It doesn't work. 回答1: Add a reference to System.Web.Extensions http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx Namespace: System.Web.Script.Serialization Assembly: System.Web.Extensions (in System.Web.Extensions.dll) 回答2: How to add System.Web.Extensions in Visual Studio 2012: Right-click your project. Click "Properties" Click the "References" tab on the left. Click the "Add"