C# 如何在此代码中放置一个guard属性？
我现在正在学习MVVM。因为我看到很多教程或项目只使用View和ViewModel，所以我有点困惑。这是我的密码 型号：C# 如何在此代码中放置一个guard属性？,c#,mvvm,caliburn.micro,C#,Mvvm,Caliburn.micro,我现在正在学习MVVM。因为我看到很多教程或项目只使用View和ViewModel，所以我有点困惑。这是我的密码 型号： public class StudentModel : PropertyChangedBase { private String _firstName; public String FirstName { get { return _firstName; } set { _firs
public class StudentModel : PropertyChangedBase
{
private String _firstName;
public String FirstName
{
get { return _firstName; }
set
{
_firstName = value;
NotifyOfPropertyChange(() => FirstName);
}
}
private Double _gradePoint;
public Double GradePoint
{
get { return _gradePoint; }
set
{
_gradePoint = value;
NotifyOfPropertyChange(() => GradePoint);
}
}
}
<UserControl x:Class="MVVMLearningWithCaliburnMicro.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=Student.FirstName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=Student.GradePoint}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
private Boolean CanSaveStudent()
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;;
}
}
public class StudentModel
{
public String FirstName { get; set; }
public Double GradePoint { get; set; }
}
<UserControl x:Class="MVVMWithCMTwo.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=StudentName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=StudentGrade}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel : PropertyChangedBase
{
public StudentModel Student { get; set; }
public String StudentName
{
get { return Student.FirstName; }
set
{
Student.FirstName = value;
NotifyOfPropertyChange(() => Student.FirstName);
}
}
public Double StudentGrade
{
get { return Student.GradePoint; }
set
{
Student.GradePoint = value;
NotifyOfPropertyChange(() => Student.GradePoint);
NotifyOfPropertyChange(() => CanSaveStudent);
}
}
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
public Boolean CanSaveStudent
{
get { return Student.GradePoint >= 0.0 && Student.GradePoint <= 4.0; }
}
}
public class StudentModel : PropertyChangedBase
{
private String _firstName;
public String FirstName
{
get { return _firstName; }
set
{
_firstName = value;
NotifyOfPropertyChange(() => FirstName);
}
}
private Double _gradePoint;
public Double GradePoint
{
get { return _gradePoint; }
set
{
_gradePoint = value;
NotifyOfPropertyChange(() => GradePoint);
}
}
}
<UserControl x:Class="MVVMLearningWithCaliburnMicro.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=Student.FirstName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=Student.GradePoint}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
private Boolean CanSaveStudent()
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;;
}
}
public class StudentModel
{
public String FirstName { get; set; }
public Double GradePoint { get; set; }
}
<UserControl x:Class="MVVMWithCMTwo.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=StudentName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=StudentGrade}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel : PropertyChangedBase
{
public StudentModel Student { get; set; }
public String StudentName
{
get { return Student.FirstName; }
set
{
Student.FirstName = value;
NotifyOfPropertyChange(() => Student.FirstName);
}
}
public Double StudentGrade
{
get { return Student.GradePoint; }
set
{
Student.GradePoint = value;
NotifyOfPropertyChange(() => Student.GradePoint);
NotifyOfPropertyChange(() => CanSaveStudent);
}
}
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
public Boolean CanSaveStudent
{
get { return Student.GradePoint >= 0.0 && Student.GradePoint <= 4.0; }
}
}
public class StudentModel : PropertyChangedBase
{
private String _firstName;
public String FirstName
{
get { return _firstName; }
set
{
_firstName = value;
NotifyOfPropertyChange(() => FirstName);
}
}
private Double _gradePoint;
public Double GradePoint
{
get { return _gradePoint; }
set
{
_gradePoint = value;
NotifyOfPropertyChange(() => GradePoint);
}
}
}
<UserControl x:Class="MVVMLearningWithCaliburnMicro.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=Student.FirstName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=Student.GradePoint}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
private Boolean CanSaveStudent()
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;;
}
}
public class StudentModel
{
public String FirstName { get; set; }
public Double GradePoint { get; set; }
}
<UserControl x:Class="MVVMWithCMTwo.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=StudentName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=StudentGrade}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel : PropertyChangedBase
{
public StudentModel Student { get; set; }
public String StudentName
{
get { return Student.FirstName; }
set
{
Student.FirstName = value;
NotifyOfPropertyChange(() => Student.FirstName);
}
}
public Double StudentGrade
{
get { return Student.GradePoint; }
set
{
Student.GradePoint = value;
NotifyOfPropertyChange(() => Student.GradePoint);
NotifyOfPropertyChange(() => CanSaveStudent);
}
}
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
public Boolean CanSaveStudent
{
get { return Student.GradePoint >= 0.0 && Student.GradePoint <= 4.0; }
}
}
公共类学生视图模型
{
公共学生模型学生{get；set；}
公共图书馆（学生）
{
Show（String.Format（“保存：{0}-（{1}）”，Student.FirstName，Student.GradePoint））；
}
公共学生视图模型（）
{
学生=新学生模型{FirstName=“Tom Johnson”，成绩点=3.7}；
}
私有布尔值CanSaveStudent（）
{
return Student.GradePoint>=0.0 | | | Student.GradePoint通知事件应出现在视图模型
中，因为它传递来自模型
的更改，并将其推送到用户界面，反之亦然。这是根据MVVM设计指南进行的
在您的特定情况下，您可以将其保持原样，但可以删除不必要的视图模型
，或者移动视图模型中的通知程序通知事件应该出现在视图模型
中，因为它会传递来自模型
的更改，并将它们推送到UI，反之亦然。这是根据MVVM设计指南进行的
在您的特定情况下，您可以将其保持原样，但可以删除不必要的视图模型
，或在视图模型
中移动通知程序。一种解决方案是从PropertyChangedBase继承viewmodel并订阅StudentModel的属性更改。然后将guard方法转换为属性，如下所示：
public class StudentViewModel: PropertyChangedBase
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
Student.PropertyChanged += delegate { NotifyOfPropertyChanged( () => CanSaveStudent)};
}
public Boolean CanSaveStudent
{
get
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;
}
}
}
公共类StudentViewModel:PropertyChangedBase
{
公共学生模型学生{get；set；}
公共图书馆（学生）
{
Show（String.Format（“保存：{0}-（{1}）”，Student.FirstName，Student.GradePoint））；
}
公共学生视图模型（）
{
学生=新学生模型{FirstName=“Tom Johnson”，成绩点=3.7}；
Student.PropertyChanged+=委托{NotifyOfPropertyChanged（（）=>CanSaveStudent）}；
}
公共布尔值学生
{
得到
{
return Student.GradePoint>=0.0 | | Student.GradePoint一种解决方案是从PropertyChangedBase继承viewmodel并订阅StudentModel的属性更改。然后将guard方法转换为属性，如下所示：
public class StudentViewModel: PropertyChangedBase
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
Student.PropertyChanged += delegate { NotifyOfPropertyChanged( () => CanSaveStudent)};
}
public Boolean CanSaveStudent
{
get
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;
}
}
}
公共类StudentViewModel:PropertyChangedBase
{
公共学生模型学生{get；set；}
公共图书馆（学生）
{
Show（String.Format（“保存：{0}-（{1}）”，Student.FirstName，Student.GradePoint））；
}
公共学生视图模型（）
{
学生=新学生模型{FirstName=“Tom Johnson”，成绩点=3.7}；
Student.PropertyChanged+=委托{NotifyOfPropertyChanged（（）=>CanSaveStudent）}；
}
公共布尔值学生
{
得到
{
return Student.GradePoint>=0.0 | | Student.GradePoint您的通知更改应该在模型中，因为这也是您绑定的内容。基本上，您的视图模型应该加载对象列表，并为大多数内容向UI提供绑定集合。您上面的实现似乎是一个带有单个对象的详细面板（例如编辑模式）
总而言之
ViewModel-应实现InotifyPropertyChanged接口
模型-应实现InotifyPropertyChanged接口
要启用/禁用命令/按钮，您应该使用命令绑定。我有一个关于WPF和Silverlight的教程，您可以参考
在过去的几年里，我也发布了一些关于这件事的教程。如果你喜欢的话，可以看看它们
您的通知更改应该在模型中，因为这也是您绑定的对象。基本上，您的视图模型应该加载对象列表，并为您的UI提供大多数内容的绑定集合。您上面的实现似乎是一个带有单个对象的详细面板（如编辑模式）
总而言之
ViewModel-应实现InotifyPropertyChanged接口
模型-应实现InotifyPropertyChanged接口
要启用/禁用命令/按钮，您应该使用命令绑定。我有一个关于WPF和Silverlight的教程，您可以参考
在过去的几年里，我也发布了一些关于这件事的教程。如果你喜欢的话，可以看看它们
好的，我的代码中有一个结论
这是我的灵感
@谢谢你的第三链接
@约翰·波尔沃拉——感谢您指出酒店的属性
重要：它应该是公共财产
这是我的代码，我觉得更干净
型号：
public class StudentModel : PropertyChangedBase
{
private String _firstName;
public String FirstName
{
get { return _firstName; }
set
{
_firstName = value;
NotifyOfPropertyChange(() => FirstName);
}
}
private Double _gradePoint;
public Double GradePoint
{
get { return _gradePoint; }
set
{
_gradePoint = value;
NotifyOfPropertyChange(() => GradePoint);
}
}
}
<UserControl x:Class="MVVMLearningWithCaliburnMicro.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=Student.FirstName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=Student.GradePoint}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
private Boolean CanSaveStudent()
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;;
}
}
public class StudentModel
{
public String FirstName { get; set; }
public Double GradePoint { get; set; }
}
<UserControl x:Class="MVVMWithCMTwo.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=StudentName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=StudentGrade}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel : PropertyChangedBase
{
public StudentModel Student { get; set; }
public String StudentName
{
get { return Student.FirstName; }
set
{
Student.FirstName = value;
NotifyOfPropertyChange(() => Student.FirstName);
}
}
public Double StudentGrade
{
get { return Student.GradePoint; }
set
{
Student.GradePoint = value;
NotifyOfPropertyChange(() => Student.GradePoint);
NotifyOfPropertyChange(() => CanSaveStudent);
}
}
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
public Boolean CanSaveStudent
{
get { return Student.GradePoint >= 0.0 && Student.GradePoint <= 4.0; }
}
}
查看：
public class StudentModel : PropertyChangedBase
{
private String _firstName;
public String FirstName
{
get { return _firstName; }
set
{
_firstName = value;
NotifyOfPropertyChange(() => FirstName);
}
}
private Double _gradePoint;
public Double GradePoint
{
get { return _gradePoint; }
set
{
_gradePoint = value;
NotifyOfPropertyChange(() => GradePoint);
}
}
}
<UserControl x:Class="MVVMLearningWithCaliburnMicro.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=Student.FirstName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=Student.GradePoint}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
private Boolean CanSaveStudent()
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;;
}
}
public class StudentModel
{
public String FirstName { get; set; }
public Double GradePoint { get; set; }
}
<UserControl x:Class="MVVMWithCMTwo.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=StudentName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=StudentGrade}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel : PropertyChangedBase
{
public StudentModel Student { get; set; }
public String StudentName
{
get { return Student.FirstName; }
set
{
Student.FirstName = value;
NotifyOfPropertyChange(() => Student.FirstName);
}
}
public Double StudentGrade
{
get { return Student.GradePoint; }
set
{
Student.GradePoint = value;
NotifyOfPropertyChange(() => Student.GradePoint);
NotifyOfPropertyChange(() => CanSaveStudent);
}
}
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
public Boolean CanSaveStudent
{
get { return Student.GradePoint >= 0.0 && Student.GradePoint <= 4.0; }
}
}
视图模型：
public class StudentModel : PropertyChangedBase
{
private String _firstName;
public String FirstName
{
get { return _firstName; }
set
{
_firstName = value;
NotifyOfPropertyChange(() => FirstName);
}
}
private Double _gradePoint;
public Double GradePoint
{
get { return _gradePoint; }
set
{
_gradePoint = value;
NotifyOfPropertyChange(() => GradePoint);
}
}
}
<UserControl x:Class="MVVMLearningWithCaliburnMicro.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=Student.FirstName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=Student.GradePoint}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel
{
public StudentModel Student { get; set; }
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
private Boolean CanSaveStudent()
{
return Student.GradePoint >= 0.0 || Student.GradePoint <= 4.0;;
}
}
public class StudentModel
{
public String FirstName { get; set; }
public Double GradePoint { get; set; }
}
<UserControl x:Class="MVVMWithCMTwo.Views.StudentView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
xmlns:cal="http://www.caliburnproject.org">
<Grid Width="525" Height="300" Background="Lavender">
<DockPanel>
<TextBlock HorizontalAlignment="Center" Text="Student Data"
DockPanel.Dock="Top" FontSize="20" />
<StackPanel Orientation="Vertical" HorizontalAlignment="Center"
VerticalAlignment="Stretch"
Margin="0,8" DockPanel.Dock="Top">
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Name" FontSize="15" Margin="5,0" />
<TextBox Name="txtName" Text="{Binding Path=StudentName}" Width="250" />
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5">
<TextBlock Text="Grade" FontSize="15" Margin="5,0" />
<TextBox Name="txtGrade" Text="{Binding Path=StudentGrade}" Width="250" />
</StackPanel>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center"
VerticalAlignment="Bottom"
DockPanel.Dock="Bottom">
<Button Name="btnSave" Width="100" Height="40"
cal:Message.Attach="SaveStudent">
<TextBlock Text="Save" FontSize="15" />
</Button>
</StackPanel>
</DockPanel>
</Grid>
</UserControl>
public class StudentViewModel : PropertyChangedBase
{
public StudentModel Student { get; set; }
public String StudentName
{
get { return Student.FirstName; }
set
{
Student.FirstName = value;
NotifyOfPropertyChange(() => Student.FirstName);
}
}
public Double StudentGrade
{
get { return Student.GradePoint; }
set
{
Student.GradePoint = value;
NotifyOfPropertyChange(() => Student.GradePoint);
NotifyOfPropertyChange(() => CanSaveStudent);
}
}
public void SaveStudent()
{
MessageBox.Show(String.Format("Saved: {0} - ({1})", Student.FirstName, Student.GradePoint));
}
public StudentViewModel()
{
Student = new StudentModel { FirstName = "Tom Johnson", GradePoint = 3.7 };
}
public Boolean CanSaveStudent
{
get { return Student.GradePoint >= 0.0 && Student.GradePoint <= 4.0; }
}
}
公共类StudentViewModel:PropertyChangedBase
{
公共学生模型学生{get；set；}
公共字符串StudentName
{
获取{return Student.FirstName；}
设置
{
Student.FirstName=值；
NotifyOfPropertyChange（（）=>Student.FirstName）；
}
}
公立双年级学生
{
获取{return Studen