将WPF扩展工具包PropertyGrid的SelectedObject值动态设置为不同的ViewModel [英] Dynamically setting SelectedObject value of WPF extended toolkit PropertyGrid to different ViewModels

问题描述

我从此链接获得了对propertygrid控件的初始帮助，以启动和显示示例数据。我的要求是基于一个事件，我应该从其视图模型中更改属性网格的SelectedObject值。



我的XAML包含具有扩展wpf工具包的PropertyGrid的Usercontrol

I got initial help for propertygrid control from this link to launch and display sample data. My requirement is based on an event, i should change the property grid's SelectedObject value from its viewmodel.

My XAML contains Usercontrol which has Extended wpf toolkit's PropertyGrid

<usercontrol x:class="Helper.View.PropertyGridUserControl" xmlns:x="#unknown">
        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:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
        xmlns:vm="clr-namespace:Helper.ViewModel"
        DataContext="{DynamicResource PropertyGridViewModel}"
        mc:Ignorable="d"
       xmlns:local="clr-namespace:Xceed.Wpf.Toolkit;assembly=Xceed.Wpf.Toolkit" >

    <Usercontrol.resources>
        <vm:propertygridviewmodel x:key="PropertyGridViewModel" xmlns:vm="#unknown" />
    </Usercontrol.resources>

    <Grid>
     <xctk:PropertyGrid x:Name="_propertyGrid" Margin="10" SelectedObject="{Binding PropertyGridData}"    AutoGenerateProperties="False">
           <!-- Only the following properties will be displayed in the PropertyGrid -->
         <xctk:PropertyGrid.PropertyDefinitions>
               <xctk:PropertyDefinition Name="CodeBookName"/>
               <xctk:PropertyDefinition Name="FavoriteColor"/>
               <xctk:PropertyDefinition Name="PetNames"/>
           </xctk:PropertyGrid.PropertyDefinitions>

       </xctk:PropertyGrid>


  </Grid>

和我的ViewModelPropertyGridViewModel是

and my ViewModel "PropertyGridViewModel" is

public class PropertyGridViewModel : ViewModelBase
{
    PropertyGrid _propertyGrid;

    public PropertyGrid PropertyGridData 
    {
        get { return _propertyGrid; }
        set 
        { 
            _propertyGrid = value;
            OnPropertyChanged("PropertyGridData");
        } 
    }

    public PropertyGridViewModel()
    {
        CodeBookViewModel vm = new CodeBookViewModel();
        PropertyGridData = new PropertyGrid();
        PropertyGridData.PropertyDefinitions = new PropertyDefinitionCollection();
        PropertyDefinition item = new PropertyDefinition();
        string[] properties = { "CodeBookName", "CodeBookID" };
        item.TargetProperties = properties;
        PropertyGridData.PropertyDefinitions.Add(item);
        PropertyGridData.SelectedObject = vm;
    }
}

当我运行此代码时，它没有在PropertyGrid中显示任何属性。如果我在.CS文件中有相同的代码，我可以看到CodeBookName属性，因为这个属性在CodeBookViewModel中可用。



我在这里做错了吗？



根据事件，我将使用不同的属性将SelectedObject更改为另一个ViewModel。可能吗？我是否必须在XAML中拥有所有viewmodel的属性？或者我可以通过创建属性从ViewModels动态生成吗？



请帮助我。提前致谢。希望我已经正确解释了我的问题。

When I run this code, it is not showing any properties in PropertyGrid. If I have the same code in .CS file, I am able to see CodeBookName property, as this property is available in CodeBookViewModel.

Am I doing anything wrong here?

Based on the event, I will change the SelectedObject to another ViewModel here with different properties. Is it possible? Do I have to have all viewmodel's properties in XAML? or Can I generate on the fly from ViewModels by creating properties?

Please help me. Thanks in advance. Hope I have explained my question properly.

推荐答案

你好Snprani，



请看类似的问题我已回答：



MVVM体系结构中的属性网格绑定 [ ^ ]



现在，您只需要通过代码更改View-Modle（即SelectedObject）。



最好的问候，



Shai

Hi Snprani,

Please look on similar question that I've answered:

Property Grid Binding in MVVM Architecture[^]

Now, you only need change the View-Modle (i.e. SelectedObject) by code.

Best Regards,

Shai

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