CODEWITHSUNDEEP
c#asp.net.netiis
Neil
Neil

Reputation: 435

ASP .Net User control error handling

We are using asp .Net with C#. I have page(.aspx) consist of multiple Web User Controls(.ascx)

I would like to have an error handling machanism in such a way that if there is any exception in one of the user control, asp .net should show some friendly error message on a control. All other control should render as expected.

Is there any way this can be done without putting place holder on each control which you show/hide in case of exception?

Upvotes: 2

Views: 4038

Answers (3)

Mark Rucker
Mark Rucker

Reputation: 8085

You could do something like this.

An abstract base class with an abstract OnLoad() that each UserControl has to implement. You can use this same model for any event that you want to have shared error handling.

public abstract class BaseUserControl : UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        try
        {
            OnLoad();
        }
        catch (Exception)
        {
            //Custom error handling here
        }
    }

    protected abstract void OnLoad();
}

public class MyUserControl: BaseUserControl
{
    protected override void OnLoad()
    {
        //My normal load event handling here
    }
}

Upvotes: 3

Erhan A
Erhan A

Reputation: 701

First create a base user controlclass which overrides default onerror event. 

 public class MyControlClass:UserControl
        {

            protected override void OnError(EventArgs e)
            {
                //here you sould add your friendly msg implementation



                //base.OnError(e); here should remain commented
            }
        }

Then you can create your user controls:

public class Control1:MyControlClass
    {
        // ....
        // ....
    }

So, if any control creates an exception , the rest will keep on working.

Upvotes: -1

Riera
Riera

Reputation: 369

1) In app_code, create a class MyPage.cs that inherits Page 

class MyPage : Page { }

2) Change the inherits of your pages to MyPage.

public partial class _Default : MyPage { ...

There's an attribute in the web.config you can use to change it if you want

3) Back to MyPage.cs, add the generic error handler of all pages

protected override void OnError(EventArgs e)
{
    /* here you can intercept the error and show the controls that you want */
    base.OnError(e);
}

Upvotes: 1

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