Dependency property in app.xaml.cs
dependency-properties, wpf
Solution
DependencyProperties can only be created on DependencyObjects, and since Application (which your App class inherits from) doesn't implement it, you can't create a DependencyProperty directly on the App class.
I assume you want this property to support binding. If this is the case, you have two options:
- Implement INotifyPropertyChanged in App.xaml.cs
- Create a DependencyObject derived class with your properties on it, and expose it as a standard read-only property of your App. The properties can then be successfully bound by "dotting-down" to them. i.e if your new property is called Properties, you can bind like so:
<TextBlock Text="{Binding Properties.Temp}" />
If the property needs to be the target of a Binding, then option #2 is your best bet.
Problem
I am new to WPF and the below question may look silly for many, please pardon me. How can I create a dependency property in app.xaml.cs? Actually, I tried to created it. The below code, ``` public static DependencyProperty TempProperty = DependencyProperty.Register("Temp", typeof(string), typeof(App)); public string Temp { get { return (string)GetValue(TempProperty); } set { SetValue(TempProperty, value); } } ``` throws the below compile time errors: The name 'GetValue' does not exist in the current context The name 'SetValue' does not exist in the current context Can anybody help me in this? Thank you!