{"id":1963,"date":"2022-08-30T15:20:54","date_gmt":"2022-08-30T15:20:54","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2013\/12\/05\/problem-about-inotifypropertychanged-collection-of-common-programming-errors\/"},"modified":"2022-08-30T15:20:54","modified_gmt":"2022-08-30T15:20:54","slug":"problem-about-inotifypropertychanged-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2022\/08\/30\/problem-about-inotifypropertychanged-collection-of-common-programming-errors\/","title":{"rendered":"problem about inotifypropertychanged-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/875cc2cb0ee7e06cd8ca003b8ae596e4?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRobaticus<br \/>\nwindows-phone-7 inotifypropertychanged missingmethodexception<br \/>\nI have been following the MSDN tutorial as a reference while making an MVC app for Winows Phone 7.1: http:\/\/msdn.microsoft.com\/en-us\/library\/hh286405(v=vs.92).aspxIn my app, I have an object in a table that implements the INotifyPropertyChanging and INotifyPropertyChanged interfaces implemented and a property like this:private DateTime lastViewDate; [Column] public DateTime LastViewDate {get { return lastViewDate; }set{if (lastViewDate != value){NotifyPropertyChanging(&#8220;LastViewDate&#8221;);lastViewDat<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/71e0dc21bfeafbb4a8d33e015be38578?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nTom Padilla<br \/>\nc# wpf mvvm inotifypropertychanged<br \/>\nI am using MVC\\MVVM and WPF. I have a form that is bound to a model and a controller that is catching the PropertyChanged events and evaluating business rules and validations. Well, I want to pop-up a message when a validation is false telling the user what is wrong and how to fix it. But I&#8217;m not sure the &#8220;correct&#8221; way from the controller. I&#8217;d like to throw an exception that can be caught by the view but I can&#8217;t figure out how. I&#8217;ve tried Dispatcher.Invoke() but that just got me an unhandled exc<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/ab35c8c1f26da325257fee54577c1084?s=32&amp;d=identicon&amp;r=PG&amp;f=1\" \/><br \/>\naccurec<br \/>\nc# dynamic data-binding devexpress inotifypropertychanged<br \/>\nI have an extended binding list for my purposes:public class MyList&lt;T&gt; : BindingList&lt;T&gt;, INotifyPropertyChanged {private List&lt;T&gt; invalidObjectsList;public MyList() : base(){invalidObjectsList = new List&lt;T&gt;();}&#8230;public bool IsValid {get{return invalidObjectsList.Count == 0;}}&#8230;\/\/ I have similar method for deletionAddElementToInvalidList(T element){invalidObjectsList.Add(element);OnPropertyChanged(&#8220;IsValid&#8221;);}&#8230;\/\/ Stuff for the INotifyPropertyChanged interfacepublic even<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/c4523e105777939a2763dacc397d1eb5?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nshansen<br \/>\nc# wpf data-binding mvvm inotifypropertychanged<br \/>\nI am working on a medium size WPF application that utilizes the MVVM pattern. ViewModels use INotifyPropertyChanged to refresh their respective Views.This approach works perfectly, except for one problem: when this application is left running for long periods of time (3-7 days) the Views (every single View in the entire app!) suddenly stop updating their bound properties. If I set a breakpoint in the ViewModels, they are chugging away happily, calling PropertyChanged like nothing is wrong. Howev<\/li>\n<li>\n<img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8f40acf9658b6a714e6e4a4a8294efdd?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\ndotNETbeginner<br \/>\nc# winforms events enums inotifypropertychanged<br \/>\npublic partial class FrmEditSiteParticulars : Form, INotifyPropertyChanged{public enum EntryTypes{Undefined,Site,Particular}private EntryTypes _EntryType;private EntryTypes EntryType { get{return _EntryType;}set{if (value != _EntryType){_EntryType = value;OnPropertyChanged(&#8220;EntryType&#8221;);}}}public event PropertyChangedEventHandler EntryTypeChanged;protected void OnPropertyChanged(string propertyName){PropertyChangedEventHandler handler = EntryTypeChanged;if (handler != null)handler(this, new Prope<\/li>\n<\/ul>\n<p id=\"rop\"><small>Originally posted 2013-12-05 16:32:47. <\/small><\/p>","protected":false},"excerpt":{"rendered":"<p>Robaticus windows-phone-7 inotifypropertychanged missingmethodexception I have been following the MSDN tutorial as a reference while making an MVC app for Winows Phone 7.1: http:\/\/msdn.microsoft.com\/en-us\/library\/hh286405(v=vs.92).aspxIn my app, I have an object in a table that implements the INotifyPropertyChanging and INotifyPropertyChanged interfaces implemented and a property like this:private DateTime lastViewDate; [Column] public DateTime LastViewDate {get { return [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1963","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1963","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=1963"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/1963\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=1963"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=1963"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=1963"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}