WPF自定义附加属性时，为什么在XAML中用不了

[qq37019736]

xmlns:local="clr-namespace:定义附加属性.Instant"

然后在<Ellipse Name="EllipseRed" Fill="Red" Width="100" Height="50" Canvas.Left="60" Canvas.Top="50"
local:TurnoverManager.Angle="{Binding ElementName=slideAngle,Path=Value}"></Ellipse>中
TurnoverManager.Angle报错：
命名空间"clr-namespace:定义附加属性.Instant"不存在local:TurnoverManager名称

[angel6709]

   public class TurnoverManager  ==》    public static class TurnoverManager 

[51Crack]

楼主的代码没有问题 http://www.cnblogs.com/DebugLZQ/p/3153098.html

[51Crack]

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:定义附加属性.Instant"
        Title="MainWindow" Height="350" Width="525">
    <Canvas>
        <Ellipse Name="EllipseRed" Fill="Red" Width="100" Height="50" Canvas.Left="60" Canvas.Top="50"
                    local:TurnoverManager.Angle="{Binding ElementName=slideAngle,Path=Value}"></Ellipse>
        <Slider Width="233" Name="slideAngle" Maximum="360" Canvas.Left="41" Canvas.Top="139" />
    </Canvas>
</Window>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Media;

namespace 定义附加属性.Instant
{
    public class TurnoverManager : DependencyObject
    {
        //通过静态方法的形式暴露读的操作
        public static double GetAngle(DependencyObject obj)
        {
            return (double)obj.GetValue(AngleProperty);
        }
        //通过静态方法的形式暴露写的操作
        public static void SetAngle(DependencyObject obj, double value)
        {
            obj.SetValue(AngleProperty, value);
        }
        //通过使用RegisterAttached来注册一个附加属性
        public static readonly DependencyProperty AngleProperty =
            DependencyProperty.RegisterAttached("Angle", typeof(double), typeof(TurnoverManager), new PropertyMetadata(0.0, OnAngleChanged));

        //根据附加属性中的值，当值改变的时候，旋转相应的角度。
        private static void OnAngleChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
        {
            var element = obj as UIElement;
            if (element != null)
            {
                element.RenderTransformOrigin = new Point(0.5, 0.5);
                element.RenderTransform = new RotateTransform((double)e.NewValue);
            }
        }
    }
}

[qq37019736]

public static class TurnoverManager 没有用 不光这个，凡是添加映射，对自己定义的类进行数据绑定都一样

xmlns:local="clr-namespace:对象绑定和数据模板"
        xmlns:mine="clr-namespace:对象绑定和数据模板.Services"
        mc:Ignorable="d"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <StackPanel >

            <StackPanel.Resources>

                <ObjectDataProvider x:Key="students"  ObjectType="{x:Type mine:StudentService}" MethodName="GetStudentList">

                </ObjectDataProvider>

[qq37019736]

我是先创建一个WPF项目，在项目里添加一个类，然后写自定义的类，然后映射到mainWindow.xaml就报错、

[angel6709]

定义附加属性.Instant .TurnoverManager 贴出来看看

[qq37019736]

namespace 定义附加属性.Instant
{
    public class TurnoverManager : DependencyObject
    {
        //通过静态方法的形式暴露读的操作
        public static double GetAngle(DependencyObject obj)
        {
            return (double)obj.GetValue(AngleProperty);
        }
        //通过静态方法的形式暴露写的操作
        public static void SetAngle(DependencyObject obj, double value)
        {
            obj.SetValue(AngleProperty, value);
        }
        //通过使用RegisterAttached来注册一个附加属性
        public static readonly DependencyProperty AngleProperty =
            DependencyProperty.RegisterAttached("Angle", typeof(double), typeof(TurnoverManager), new PropertyMetadata(0.0, OnAngleChanged));

        //根据附加属性中的值，当值改变的时候，旋转相应的角度。
        private static void OnAngleChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
        {
            var element = obj as UIElement;
            if (element != null)
            {
                element.RenderTransformOrigin = new Point(0.5, 0.5);
                element.RenderTransform = new RotateTransform((double)e.NewValue);
            }
        }
    }
}