Getting Index of a specific row??

[Gabriel]

I've got  a gridview and a persistent class which is binded to the gridview via ObjectView. I want to search for a specific row in a specific condition then focus to that row. For doing that I used the following code to find the specific row, now I want to find the index of the result in the grid so that I can focus on the specific row in the grid:

IObjectScope scope = ObjectScopeProvider1.ObjectScope();
var result = from c in scope.Extent<MyPersistentClass>()
             where c.Id == 1
             select c;

I don't know how to use IndexOf method of ObjectView, every time I use this function I get -1 as a result.
What should I do??

[Damyan Bogoev]

Hello Gabriel,

The reason for this behavior is that the IObjectScope instance that is used for retrieving the persistent object is not the same as the IObjectScope instance used to bind the GridView.
You could use the following approach to work with the correct IObjectScope object:

IObjectScope scope = this.ObjectProvider1.Context as IObjectScope;
if (scope != null)
{
    MyPersistentClass result  = scope.Extent<MyPersistentClass>().FirstOrDefault(x => x.ID == 1);
    if (result  != null)
    {
        int index = this.ObjectView1.IndexOf(result);
        ...
    }
}

Hope that helps.

Regards,
Damyan Bogoev
the Telerik team

[Gabriel]

Thanks, that worked.
But what if I have multiple results instead of just one result, and I want to navigate trough the results. That's why I used this query:

var result = from c in scope.Extent<MyPersistentClass>()
             where c.Id == 1
             select c;
// or maybe this:
var result = from c in scope.Extent<MyPersistentClass>()
             where c.Name == "some text"
             select c;

[Damyan Bogoev]

Hello Gabriel,

You could store the result from the query within a collection:

List<MyPersistentClass> result = from c in scope.Extent<MyPersistentClass>()
                                 where c.FilterField = filterValue
                                 select c;

Later you will be able to iterate over this list and retrieve the index of the current object from the list using the
approach proposed in the previous post.
Hope that helps.

Greetings,
Damyan Bogoev
the Telerik team