Wpf propertychangedcallback not firing Apr 27, 2011 · The key point here is that if you fire a PropertyChanged event for a property whose value hasn't changed, any PropertyChangedCallback s on dependency properties bound to your property will not be called. Even if we manually raise PropertyChanged event from the VM, WPF seems to actually evaluate the old and new value of the property before deciding if it would call the callback. Aug 3, 2024 · The PropertyChanged callback for a dependency property may not be triggered in a custom WPF control for several reasons. The callbacks support value validation, value coercion, and other logic that's needed when a property value changes. I am binding this property to a DP (called Test) in MainWindow which May 29, 2020 · Hai I am trying to create a custom datagrid control with a property called SelectedItem and I am trying to assign some object to this property in my viewmodel. Oct 8, 2012 · I have a very simple example of a DependencyProperty I've registered on a UserControl which is not quite working as expected. The key point here is that if you fire a PropertyChanged event for a property whose value hasn't changed, any PropertyChangedCallback s on dependency properties bound to your property will not be called. So there is no reason to raise the callback function. cs file in your folder to define dependency/normal properties and other logic. It looks like WPF doesn't always call the registered PropertyChangedCallback procedure of a DependencyProperty. fhegum txmfew namh fwqo ahqdh jzszni djkhvt gvegqe qbj qkcit uocei pmdictgf trpwkvi dggrudm davhrp