CODEWITHSUNDEEP
wpf
czuroski
czuroski

Reputation: 4332

WPF Intercept dependency property

I have a custom control that inherits from a datagrid. I have to evaluate a property each time the data is bound the grid. I am currently binding using DataSource="{Binding....}"

Is there a way that I can create a new dependency property (?) which which will be evaluated each time the DataSource property is changed? Can I somehow "attach" my method to the DataSource Property?

I hope my intent is clear.

Thanks for any thoughts.

Upvotes: 0

Views: 361

Answers (2)

czuroski
czuroski

Reputation: 4332

I was able to handle this by overriding OnPropertyChanged and using the following code along with my new dependencyproperty - 

if(e.Property.Name = "DataSource")
{
// Invoke my new method
}

Upvotes: 0

devuxer
devuxer

Reputation: 42374

If you are inheriting from DataGrid, you can just override the OnItemsSourceChanged method, like this:

protected override void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
{
    // update your property here
    base.OnItemsSourceChanged(oldValue, newValue);
}

Upvotes: 1

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