CODEWITHSUNDEEP
silverlightlinqwcf-ria-services
NewDTinStackoverflow
NewDTinStackoverflow

Reputation: 543

Databinding with comboxBox in silverlight

I am trying to use a dataContext to populate a comboxbox but always got nothing:

EntityQuery<Tests> testQ = myDomainContext.GetTestQuery().Where(t => t == 5);
LoadOperation<Tests> loadOp = myDomainContext.Load(testQ)
comboxBoxTest.ItemSource = loadOp.Entities.Select(t => t.Name).Distinct().ToList();

Can someone tell me what is wrong here?

Upvotes: 0

Views: 144

Answers (2)

Anatolii Gabuza
Anatolii Gabuza

Reputation: 6260

As you may know mostly all operations in RIA are asynch. And you should be aware of this while executing queries.
You have to use callback methods (@Zabavsky's answer has good ones) for such reasons. Also I slightly recommend you to use MVVM pattern instead of code-behind messing. This will make your code and logic cleaner.

Upvotes: 1

Zabavsky
Zabavsky

Reputation: 13640

You probably don't load the entities. Try

EntityQuery<Tests> testQ = myDomainContext.GetTestQuery().Where(t => t == 5);
LoadOperation<Tests> loadOp = myDomainContext.Load(testQ);
loadOp.Completed += (o, e) =>
    {
        comboxBoxTest.ItemSource = loadOp.Entities.Select(t => t.Name).Distinct().ToList();
    };

Or

myDomainContext.Load(testQ, new Action<LoadOperation<Tests>>(result =>
    {
        comboxBoxTest.ItemSource = result.Entities.Select(t => t.Name).Distinct().ToList();
    }), null);

Upvotes: 1

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