WPF MVVM 切换用户控件
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WPF MVVM switch usercontrols
提问by Chris
I am new to MVVM and WPF but I know what's going on in MVVM. I have a problem with switching between user controls in mainwindow. In my app I have: MainWindow.xaml with log and 2 links: Show all and Create new. Of course I have ViewModel for it. I have 2 more UserControls: ShowAll and Create with ViewModels and all logic in it (adding data etc). How can I show create form when I click link Create new or show all when I click ShowAll?
我是 MVVM 和 WPF 的新手，但我知道 MVVM 中发生了什么。我在主窗口中的用户控件之间切换时遇到问题。在我的应用程序中，我有： MainWindow.xaml with log 和 2 个链接：Show all 和 Create new。当然，我有它的 ViewModel。我还有 2 个用户控件：ShowAll 和 Create with ViewModels 以及其中的所有逻辑（添加数据等）。单击“新建”链接时如何显示创建表单或单击“全部显示”时显示全部？
In windowForms I just hide UC, buto here is no code behind :)
在windowForms中，我只是隐藏了UC，但这里没有代码:)
My MainWindow.xaml:
我的 MainWindow.xaml：
<Window x:Class="Test.Views.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="300" Width="300">
<Grid>
<StackPanel>
<TextBox Text="{Binding Name}"/>
<Button Content="Change" Command="{Binding ChangeCommand}"/>
</StackPanel>
</Grid>
</Window>
My MainWindowViewModel:
我的主窗口视图模型：
class MainWindowViewModel : BaseViewModel
{
private Person _person;
private BaseCommand _changeCommand;
public MainWindowViewModel()
{
_person = new Person();
}
public string Name
{
get
{
return _person.Name;
}
set
{
if (_person.Name != value)
_person.Name = value;
OnPropertyChanged(() => Name);
}
}
public ICommand ChangeCommand
{
get
{
if (_changeCommand == null)
_changeCommand = new BaseCommand(() => change());
return _changeCommand;
}
}
private void change()
{
_person = new Person();
Name = _person.Imie;
}
}
In Create and ShowAll there is no code. In xaml only a label, VM is empty. Just for test.
在 Create 和 ShowAll 中没有代码。在xaml中只有一个标签，VM是空的。只是为了测试。
Thank's for help!
感谢帮助！
回答by Slugart
You can use a ContentControlto display a specific DataTemplatebased on the type of ViewModel that is bound to the ContentControl.
您可以使用ContentControl来显示DataTemplate基于绑定到ContentControl.
http://www.japf.fr/2009/03/thinking-with-mvvm-data-templates-contentcontrol/
http://www.japf.fr/2009/03/thinking-with-mvvm-data-templates-contentcontrol/
The command that is bound to the ShowAll button can simply change a property on your main ViewModel which is what is bound to your content control.
绑定到 ShowAll 按钮的命令可以简单地更改主 ViewModel 上的一个属性，该属性绑定到您的内容控件。
