WPF Blend 自定义控件

#1.使用Blend 设计控件

<UserControl x:Class="WpfApp25.UserControl1"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:WpfApp25"
             mc:Ignorable="d" 
             d:DesignHeight="450" d:DesignWidth="800">
    <UserControl.Resources>
        <local:StatusColorConverter x:Key="statusColorConverter"></local:StatusColorConverter>
    </UserControl.Resources>
    <Grid>
        <Ellipse HorizontalAlignment="Left" Height="100" Stroke="#FFF5F2F2" VerticalAlignment="Top" Width="100" StrokeThickness="5"
      Fill="{Binding StatusP, Converter={StaticResource statusColorConverter},UpdateSourceTrigger=PropertyChanged, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:UserControl1}}}">
        </Ellipse>
    </Grid>
</UserControl>

#2.给控件添加自定义属性

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System