Exception handling in client object model

We are familiar with try, catch and finally. It has been around for many years. We cannot ignore that at all as it plays a vital role in development.

Same is the case when we write a client object model code for SharePoint 2010.

ExceptionHandlingScope is a new class that has been introduced in SharePoint 2010 which allows us to perform the same action.

Let’s say you are working with managed client object model.

Here is a way to get a context of ExceptionHandlingScope and to work with it.

ClientContext ccontext = new ClientContext("site collection path");           

ExceptionHandlingScope exceptionscope = new ExceptionHandlingScope(ccontext);           

using (exceptionscope.StartScope())

            {

                using (exceptionscope.StartTry())

                {

                               // Code Block

                }

                using (exceptionscope.StartCatch())

                {                    

                     //Code Block which handles the exception

                }

                using (exceptionscope.StartFinally())

                {                    

                    //Code Block that always executes

                }

            }

Let’s say you are working in ECMA client object model and would like to handle exception

function Example()
{

this.clientcontext = new SP.ClientContext.get_current();

var clientScope = new SP.ExceptionHandlingScope(this.clientcontext);

var startScope = clientScope.startScope();

var tryScope = clientScope.startTry();

// Code Block

tryScope.dispose();

var catchScope = clientScope.startCatch();

 //Code Block which handles the exception

catchScope.dispose();

var finallyScope = clientScope.startFinally();

//Code Block that always executes

finallyScope.dispose();

startScope.dispose();

}

I hope this will help developing smoother and robust client object model application.