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.net Attributes that handle exceptions - usage on a property accessor


.net Attributes that handle exceptions - usage on a property accessor

By : Ailton Semeone
Date : November 21 2020, 07:01 PM
I hope this helps . No, that isn't possible unless you use PostSharp or similar. This isn't a standard attribute feature - rather it is something that ASP.NET MVC is adding for you. You don't get it for all attributes.
code :


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Is assigning a value to a property through a set accessor via its container's get accessor a bad thing?

Is assigning a value to a property through a set accessor via its container's get accessor a bad thing?


By : Shivetto
Date : March 29 2020, 07:55 AM
seems to work fine Not necessarrily.
For example, look at the parameters collection on a SqlCommand object. You can change the items in the collection, but you can't assign a new parameters collection to the command object.
handle exceptions with attributes

handle exceptions with attributes


By : Neel Patel
Date : March 29 2020, 07:55 AM
will be helpful for those in need This cannot be done with .NET out of the box.
tl;dr - There is no "very easy/simple way (...) to handle an exception via attributes"
code :
public class OrderFulfillmentService  
{ 
    public void Fulfill( Order order )  
    { 
       try  
       { 
          // Do stuff.   
       }  
       catch ( Exception e ) 
       { 
            if ( ExceptionHandler.Handle(e) ) 
                throw; 
       }  
    }  
} 
public class OrderFulfillmentService  
{ 
    [HandleException]  
    public void Fulfill( Order order )  
    { 
        // Do stuff. 
    } 
}
public class Interceptor : IInterceptor
{
    public void Intercept(IInvocation invocation)
    {
       try{
            invocation.Proceed();
        } catch(Exception ex) {
           //add your "post execution" calls on the invocation's target
        }
    }
}
Are declared property attributes overridden when implementing custom accessor methods?

Are declared property attributes overridden when implementing custom accessor methods?


By : Marshall Erling
Date : March 29 2020, 07:55 AM
Hope that helps From "4.1.1 Property declarations" in the Clang/ARC documentation (emphasis added):
copy implies __strong ownership, as well as the usual behavior of copy semantics on the setter. ...
code :
- (void) setProperty:(NSObject *)property
{
    _property = [property copy];
    // Some more code here
}
How to write a custom C# attributes to handle exceptions in a handler

How to write a custom C# attributes to handle exceptions in a handler


By : user2710039
Date : March 29 2020, 07:55 AM
this one helps. Within the MVC framework there is the HandleErrorAttribute class. This you can extend and override the OnException method. A good example of this is the in the Elmah MVC project where they have a HandleErrorAttribute class.
This question also provides some example of HandleErrorAttribute, again in the context of ELMAH but it should be relatively obvious that in overriding OnException you can provide your custom exception logic for MVC actions.
sonarqube c# set accessor error: Use the 'value' parameter in this property set accessor declaration

sonarqube c# set accessor error: Use the 'value' parameter in this property set accessor declaration


By : Saeid
Date : March 29 2020, 07:55 AM
Does that help When you are calling set in property, you are actually calling set_FrontImagePath(string value) method, which have parameter - string value. In your case you are trying to call that method without any parameters, which is giving you Use the 'value' parameter in this property set accessor declaration" error.
You can do something like this in your using part:
code :
string _frontImgPath = string.Empty;

public string FrontImagePath
{
    get{
        return _frontImgPath;
    }
    set{
        _frontImgPath = value;
    }
}

void SomeMethod()
{
    . . .
    OriginalImgPath = "x:\\someimage.img";
    . . .
    HostUrl = "yourHostUrl";
    . . .
    if (!String.IsNullOrEmpty(OriginalImgPath) && !String.IsNullOrEmpty(HostUrl))
        FrontImagePath =  HostUrl + OriginalImgPath;
    . . .
}
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