[英]Add New Usercontrol On button Click Command In WPF MVVM
嗨,我正在嘗試動態顯示usercontrol,但是它不起作用...請幫助我改善代碼。 在MainWindowViewModel的cunstructor中,我嘗試設置contentcontrol的初始屬性。 先感謝您
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:VM="clr-namespace:WpfApplication1.ViewModel"
xmlns:View="clr-namespace:WpfApplication1.View"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<DataTemplate DataType="{x:Type VM:FirstControlViewModel}">
<View:FirstControl></View:FirstControl>
</DataTemplate>
<DataTemplate DataType="{x:Type VM:SecondControlViewModel}">
<View:SecondControl></View:SecondControl>
</DataTemplate>
</Window.Resources>
<Grid>
<ContentControl Content="{Binding LoadedControl}" />
</Grid>
</Window>
查看型號代碼:-
public class MainViewModel: INotifyPropertyChanged
{
public MainViewModel()
{
LoadedControl = "FirstControlViewModel";// here i am setting property
//But not working
}
private string _LoadedControl;
public string LoadedControl
{
get { return _LoadedControl; }
set { _LoadedControl = value;
NotifyPropertyChanged("LoadedControl");
}
}
您需要將LoadedControl
設置為ViewModel類型的實例,而不是字符串!
public MainViewModel()
{
LoadedControl = new FirstControlViewModel();
}
private ViewModelBase _LoadedControl;
public ViewModelBase LoadedControl
{
get { return _LoadedControl; }
set { _LoadedControl = value;
NotifyPropertyChanged("LoadedControl");
}
}
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