Binding to calculated fields

[Marc]

Please note this is not about fields calculated by the grid, but how the grid binds fields that are calculated in a model class.

I'm trying to improve performance on a gridview control that is bound to a collection of business objects. Each object has many calculated fields. The fields are all calculated prior to the data being loaded and the grid being displayed, but I'm finding that the control is constantly 'getting' the calculated fields, causing the (sometimes expensive) calculations to be performed again.

Is there a setting or design practice that can make this more efficient?

[Pavel Pavlov]

Hi Marc,

Most of the operations performed when displaying data in RadGridView are based on bindings.
When scroll, sort , group and other data shaping operations are performed , cells are being recreated and bindings set. This causes the getters of your view model properties to be invoked.

If the getters are heavy  the recommended approach would be to use caching of the values at your view model.

Greetings,
Pavel Pavlov
the Telerik team

[Marc]

Pavel

Thanks. I have tried to implement some caching, but I not sure if it the most efficient way. Would you have an example of the best way to cache this for the gridview control?

[Pavel Pavlov]

Hello Marc,

I meant something like :

            private object myProperty;
        public object MyProperty
        {
            get
            {
                if (this.myProperty == null)
                {
                    this.myProperty = CalculateMyProperty();
                }
                return this.myProperty;
            }
        }

Actually nothing fancy. Just taking care for the heavy logic ( in this case CalculateMyProperty)  to be executed once and not on every single call of the getter.

Regards,
Pavel Pavlov
the Telerik team