CODEWITHSUNDEEP
c#bindinglist
Jan
Jan

Reputation: 23

BindingList & InotifyPropertyChanged

I have searched all the forum, but I could not find an answer for my question. Maybe I just used the wrong keywords. Let's assume I have a class Foo:

class Foo
{
    string a;
    string b;
}

A number of instances of Foo are now saved in a

BindingList<Foo> bf;

Then I have a second class which realizes some sort of relation between objects of type Foo:

class Bar
{
    Foo f1;
    Relation r;
    Foo f2;
}

Again, a number of instances of class Bar are saved in a 

BindingList<Bar> bb;

At a certain point in my program, I now delete an instance of Foo, say f7.

bb.Remove(f7);

Is there any possibility, that exactly those instances of Bar are deleted that hold a reference to f7? At the moment, I hook on the ListChanged event of bf and manually traverse bb and kill those instances of Bar that contain f7. Is there a smarter way?

Thanks for your help, Guido

Upvotes: 1

Views: 357

Answers (1)

LukeHennerley
LukeHennerley

Reputation: 6444

Judging by your OP. I suspect that you want something like this. You would have to ensure that your Foo objects in Bar are the same instance, or implement IEquatable on Foo.

var barWhereFoosExist = bb.Where(x => x.f1.Equals(f7) || x.f2.Equals(f7));
foreach(Bar b in barWhereFoosExist)
{
  bb.Remove(b);
}

Try the above using something like this.

BindingList<Bar> bb = new BindingList<Bar>();
Foo f7 = new Foo();
Bar b = New Bar();
b.f1 = f7;
b.f2 = new Foo();

Upvotes: 1

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