Xamarin.Forms: Use converters with binding objects which can have null as value.
This content has 3 years. Some of the information in this post may be out of date or no longer work. Please, read this page keeping its age in your mind.You have a converter, which should return a specific value, even if the binded object is null. Converters does not get executed, when the binded value is null. But here is a solution, how to handle this situations. Define an example converter In this case we will use an Int value to bool value converter. This code returns true, if the binded value is greater than the value provided as a converter parameter. It can be used with the following code snippet in XAML: But what happends, when the ‘Object’ is null? Well the converter does not get executed. And since View’s default value of the IsVisible bindable property is true, then the label will be visible, even if the Object is null. How to handle null scenarios? Bindings have a property called FallbackValue. Give a value to the fallbackvalue property in order to override the default value, like this: This should return false even if the binded obejct is null. 🙂
Hi, I am András,
I am a seasoned software engineer from Budapest, Hungary with a strong focus on mobile app development using .NET MAUI and Xamarin.Forms. My expertise also extends to website building for my happy customers and other complex system designing. I am passionate about developing well-organized, maintainable software solutions.