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I have this custom control:
public class CustomButton : Button
{
public Test Test { get; set; }
}
And this class:
public class Teste
{
public string MyProperty { get; set; }
}
I want to change this property MyProperty, doing this in C# is very easy, but I have to do this in XAML and it doesn’t work. What I’m using so far is this:
<UserControl.Resources>
<cc:Teste x:Key="Exemplo" MyProperty="Exemplo"/>
</UserControl.Resources>
<cc:CustomButton Test="{StaticResource Exemplo}"/>
But I get that very common mistake of NullReferenceException. How can I access this property MyProperty and change its value by XAML?
The error in C#, not XAML, you need to initialize the object before accessing it. You manipulate data in C#, XMAL is not a programming language.
– Maniero
@Maniero I did what you said, I entered the Test class, but there is another problem, in the example I left above, I leave the property Myproperty with the value "Example", I did some tests here and one time the value of Myproperty is simply nothing and another time is the text of Example, never gets only Example.
– Henrique Ferreira
It’s like I have two instances of Test, one hour calls the one with the text, another hour calls the one without text.
– Henrique Ferreira