CollectionChanged with it's own, and simply passes on all the collection changed events to any attached event handler. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. CollectionChanged not public? Ask Question. Asked 11 years, 10 months ago. Active 4 months ago. Viewed 16k times.
Improve this question. Oskar Oskar 7, 4 4 gold badges 33 33 silver badges 42 42 bronze badges. Out of curiosity, why would you be expecting a read-only collection to change? Surely then it wouldn't be read only? Counter-question: Why would I not expect an ObservableCollection to change? What's the use of observing it if nothing is going to change? Well the collection is most definitely going to change, but I have consumers which are only allowed to observe it.
Looking but no touching I recently came across this issue aswell. Why is it that C allows a class to restrict access interface events but not interface methods? I have to put in my vote for this being total insanity. WTF is the point? And to everybody who keeps saying that a read-only collection will never change, think reallllllly hard about what you're saying. It only means that code that can only see the collection through such a property is not allowed to change it.
It can indeed be changed when code adds or removes members via the underlying collection. Readers should still be able to be notified that changes have occurred, even if they cannot change the collection themselves. They may still need to respond to changes themselves. I can think of no valid reason to restrict the CollectionChanged property as has been done in this case. Show 8 more comments. Active Oldest Votes. Improve this answer. Nick Nick 2, 1 1 gold badge 20 20 silver badges 18 18 bronze badges.
You can expose claims by derving from UserNameSecurityTokenAuthenticator and plugging in your derived class. The code below shows how to do this, using the password as an example claim. AddClaimSet this , this. GetHostEntry String. FindMachineCertificate ; serviceHost. ExecutionEngineException' occurred in Unknown Module. ServiceModel 3. Sensitive information may be logged in the clear, even if it was encrypted on the wire: for example, message bodies. Then Tipo de suceso: Error Origen del suceso:.
NET Runtime version 2. NET 2. Thank you very much for your help. Now I am getting the Status code Bad Request. At that time the Status code was Unsupported Media Type. But everything failed. A Canvas is really just a way to position children relative to an origin. A Canvas can actually have no dimension of its own but still host visible children.
Hi I have a customer who contacts my service and want me to send him back continues information. The interesting part is I have only ONE connection. I cannot reestablish a connection with my client whenever I have new data for him. In the past, when I programmed sockets this was a trivial task.
My client connected to me, I accepted his socket and wrote on this socket every new data I had. The socket was never closed and I had a continues channel to my user.
However, if I put the control on a window that is displayed via ShowDialog then the keyboard control slows down dramatically.
For example, the caret index change takes about a second. I'm trying to figure out why this is so much slower. Any help would be appreciated. All rights reserved. Voila, my partial class was beautifully amongst friends. Unfortunately I'm at least twice confused than he's about Bitmapxxx classes.
So, as an alternative to merely casting your collection as INotifyCollectionChanged , if you happen to be subclassing ReadOnlyObservableCollection , then the following provides a more syntactically convenient way to access the a CollectionChanged event:.
Those programs would contain invalid code once the event's visiblity is changed to public in the base class, because it is not allowed to restrict the visibility of an event in derived classes. So unfortunately, making protected virtual events public later on is a binary-breaking change, and hence it will not be done without very good reasoning, which I am afraid "I have to cast the object once to attach handlers" simply isn't. Using the information above about needing to cast to INotifyCollectionChanged , I made two extension methods to register and unregister.
CollectionChanged is not exposed for valid reasons outlined in other answers , so let's make our own wrapper class that exposes it:. People have asked why you would want to observe changes to a read-only collection, so I'll explain one of many valid situations; when the read-only collection wraps a private internal collection that can change.
Suppose you have a service that allows adding and removing items to an internal collection from outside the service. Now suppose you want to expose the values of the collection but you don't want consumers to manipulate the collection directly; so you wrap the internal collection in a ReadOnlyObservableCollection.
Note that in order to wrap the internal collection with ReadOnlyObservableCollection the internal collection is forced to derive from ObservableCollection by the constructor of ReadOnlyObservableCollection. Now suppose you want to notify consumers of the service when the internal collection changes and hence when the exposed ReadOnlyObservableCollection changes.
Rather than rolling your own implementation you just want to expose the CollectionChanged of the ReadOnlyObservableCollection.
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