WPF中的设计时数据问题

WPF中的设计时数据问题,wpf,visual-studio-2010,design-time-data,Wpf,Visual Studio 2010,Design Time Data,嗨,我尝试在wpf中使用我的第一个设计时数据。我使用以下教程: 我创建了简单的数据类,如下所示: public class Avatar:INotifyPropertyChanged { private string _name; private string _surname; public string Name { get { return _name; } set

嗨,我尝试在wpf中使用我的第一个设计时数据。我使用以下教程:

我创建了简单的数据类,如下所示:

public class Avatar:INotifyPropertyChanged
    {
        private string _name;
        private string _surname;

        public string Name
        {
            get { return _name; }
            set
            {
                _name = value;
                NotifyPropertyChanged("Name");
            }
        }

        public string Surname
        {
            get { return _surname; }
            set
            {
                _surname = value;
                NotifyPropertyChanged("Surname");
            }
        }


        public new event PropertyChangedEventHandler PropertyChanged;

        private void NotifyPropertyChanged(String info)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(info));
            }
        }

    }
然后我创建了示例数据:

<TestForDesignTimeData:Avatar xmlns:TestForDesignTimeData="clr-namespace:TestForDesignTimeData" Name="John" Surname="Smith"/>

并尝试在wpf窗口中使用设计时数据:

<Window x:Class="TestForDesignTimeData.MainWindow"
        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:TestForDesignTimeData="clr-namespace:TestForDesignTimeData"
        mc:Ignorable="d" 
        Title="MainWindow" Height="350" Width="525">

        <StackPanel d:DataContext="{d:DesignInstance TestForDesignTimeData:Avatar}">
            <TextBlock Background="Yellow" Height="40" Width="250"   Text="{Binding Path=Name}"/>
            <TextBlock Background="Yellow" Height="40" Width="250"   Text="{Binding Path=Surname}"/>
    </StackPanel>
</Window>


但我在designer中看到了空文本框。我做的不好吗?

您需要从
Avatar
创建一个派生类,该类将在设计时使用,并在该类的构造函数中定义示例数据:

public class AvatarDesignTime : Avatar
{
   public AvatarDesignTime()
   {
      Name = "John";
      Surname = "Smith";
   }
}
然后,您需要为DesignInstance指定
IsDesignTimeCreatable=True
,以便在设计时启用实例创建(否则,您指定的类型仅用于提供有关类型成员的信息,以便在设计时设置绑定):


Windows Phone项目中经常这样做,但在使用MVVM模式时,不必为设计时数据派生类

视图:


设计时数据(AvatarSampleData.xaml):


嗯,, 汽车

<StackPanel d:DataContext="{d:DesignInstance TestForDesignTimeData:AvatarDesignTime, IsDesignTimeCreatable=True}">
<phone:PhoneApplicationPage     
d:DataContext="{d:DesignData ../DesignData/AvatarSampleData.xaml}" .../>
<local:AvatarViewModel 
    xmlns="http:schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http:schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:YourNameSpace.ViewModels"

    Name="Harald"
    Surname="Flasch">
</local:AvatarViewModel>