Can parameters be passed to a WPF user control?

问题:

Can values or parameters be passed to a WPF user control? I am using MVVM pattern.

<local:SampleUserControlView Forecolor="{Binding ForeColor}"/> 

where

ForeColor is a property of Type Color or Brush in Viewmodel of the window hosting SampleUserControl View.

By the way, should the property be of type Color or Brush?

回答1:

yes you can pass by using dependency properties. You can create dependency property in your usercontrol of type what you want to pass. Below is a small example which will show you how it works.

public static readonly DependencyProperty MyCustomProperty = 
DependencyProperty.Register("MyCustom", typeof(string), typeof(SampleUserControl));
public string MyCustom
{
    get
    {
        return this.GetValue(MyCustomProperty) as string;
    }
    set
    {
        this.SetValue(MyCustomProperty, value);
    }
}

And MyCustom you can set from your parent VM, like

<local:SampleUserControlView MyCustom="{Binding MyCustomValue}"/>