i'm a newbie .net mvc developer and i want to know, is there anyway to develop my own error handler without using the famous try/catch statement. i'm using an XML file to render components in a view, and i want for example to get an error message useful for me to know that i violated a constraint based on the xml file
(example if i add another tag without >'type' attribute, this can generate a message for me at runtime). i hope i make myself clear thanks in advance,
In the Global.asax can catch the exceptions, global.asax has many handlers of events on your aplication like Application_start or that you need Application_Error
void Application_Error(){
Exception exception = Server.GetLastError();
//do what you need with the exception...
}
Actually i prefer using the ActionFilter class to override the OnActionExecuting, OnActionExecuted,OnResultExecuting and OnResultExecuted method. And i think that the control of xml properties cannot be done from c sharp, well i will use the if condition for that. Thanks anyway
I believe the best place for handling exceptions is in global.asax.cs.
protected void Application_Error(object sender, System.EventArgs e)
{
// custom logger
IErrorLogger errorLogger = new CustomLogger();
// config of error handler
MvcExceptionHandlerConfig config = new MvcExceptionHandlerConfig("Error", "Error", 404, 500);
// init and handle
new MvcExceptionHandler.MvcExceptionHandler(this, errorLogger, config).Handle();
}
Demo is available here: https://github.com/mholec/mvcexceptionhandler
Of course, it depends, what kind of exceptions you want to handle. Application_Error is great place for handling errors 400, 404, 5xx etc., on the other hand it is not usable for authentication errors (you need to create special filter).
