You can reuse a user control over and over and the logic is isolated from the general flow of your program. Custom control can be (and is sometimes are required to be) templated (for example, a Data Template). This is confusing to XAML developers because they are accustomed to binding to CLR properties that implement INotify Property Changed in their view models. A data binding source source CAN be a CLR-type property.Conversely, user controls cannot be templated as the XAML is embedded. Net developer then you will likely start with simple CLR properties. Like this: Setting such a property is a snap, and it works just fine. A data binding target MUST be a dependency property.Like this: In the code above we don’t set the data context of the user control, we set the data context of the first child in the user control. This one little workaround can save you dozens of hours pulling your hair.And, the best part, it works and gets the job done.A Value Converter converts the value from a source type to a target type and back.WPF already includes some value converters but in most cases you will need to write your own by implementing the override.
Let’s say you try this: You will not receive an error for trying to set the user control’s data context.Your user control can be as simple as this: Now your user control can bind; and it can bind one or two way!It’s up to use to use the mode that is appropriate for the controls you are embedding in your user control.How to bind for example properties of Document View Model. Can I somehow define terget path for this kind of binding?
In beginning, you discussed that source property is a .
Please note: the data context property of the user control inherits from the parent. But user controls don’t anticipate a data context type. Writing to one writes to the other and the dependency property itself keeps the coalesced value.