DataGrid中的SelectedItem从一个UserControl中提供另一个UserControl中的数据 [英] SelectedItem in DataGrid from one UserControl to provide data in another UserControl

问题描述

我真的很喜欢WPF和数据绑定，但我对如何跨UserControls绑定数据感到困惑。我是WPF的新手，我觉得我对大多数WPF都了解，但我只是不知道如何移动数据。

我的场景：

我有一个带有DataGrid的UserControl，其ItemsSource绑定到ObservableCollection（ MyFiles ）。我还定义了一个属性来保存SelectedItem（ MySelectedFile ）。

当我在DataGrid中选择不同的行时，我想要<的内容; g class =" gr_ gr_35 gr-alert gr_spell gr_inline_cards gr_run_anim ContextualSpelling ins-del multiReplace"数据-GR-ID =" 35 QUOT; id =" 35"> MySelectedFile< / g> 在UserControlB中显示
。

例如......

UserControlA.xaml

< DataGrid ItemsSource =" {Binding路径= MYFILES}" SelectedItem =" {Binding Path = MySelectedFile}" /> 

UserControlA.xaml.cs

 
 public ObservableCollection< CustomFileClass> MyFiles {get;组; } 
 
 public CustomFileClass MySelectedFile {get;组; } 
 

然后我有一个带有各种CheckBoxes，TextBoxes等的UserControl ......我想要填充UserControlA中来自MySelectedFile的数据。

例如......

UserControlB.xaml

 
< StackPanel> 
 
<！ - 我假设每个属性（Text，IsChecked，ItemsSource）都会绑定到某个东西，我只是不确定是什么。 - > 
 
< TextBox x：Name =" FileTitle"文本= QUOT;" /> 
 
< CheckBox x：Name =" FileIsActive"器isChecked = QUOT;" /> 
 
< ListBox x：Name =" FileTopics"的ItemsSource = QUOT;" /> 
 
< / StackPanel> 
 

然后这两个UserControl都显示在MainWindow.xaml中。

 
< StackPanel> 
 
< uc：UserControlA /> 
 
< uc：UserControlB /> 
 
< / StackPanel> 
 

任何帮助将不胜感激。我觉得一旦掌握了从A到B获取数据的概念，我就会好起来。

谢谢！

$ b $



编辑：我不知道为什么这个论坛会在周围添加g标签MySelectedFile。

解决方案

你还没有真正解释这些属性的位置。

假设他们在viewmodel是mainwindow的datacontext，然后你几乎必须实现inotifyproperychanged。

在MSelectedFile的setter中改变属性（你需要一个propfull）并在你的其他usercontrol中绑定。

此示例可能很有趣：

https://social.technet.microsoft.com/wiki/contents/articles/30564.wpf- uneventful-mvvm.aspx

有一系列厨师和selectedchef看起来像：

 private Person selectedChef; 
 
 public Person SelectedChef 
 {
 get 
 {
 return selectedChef; 
} 
设置
 {
 selectedChef = value; 
 RaisePropertyChanged（）; 
 DoSomethingWhenChefChanged（）; 
} 
} 

你不需要那个dosomethingwhenchefchanged。

你也可以使用/来绑定符号并将所选项目与当前项目同步。

本文通过资源共享集合，因此不是您想要的那样，但它描述了当前项目的事物。

https://social.technet.microsoft.com/wiki/contents/articles/29859.wpf-tips-bind-to-current-item-of-collection.aspx

I really like WPF and the data binding, but I'm getting stuck on how to bind data across UserControls. I'm new to WPF, and I feel like I understand most of WPF, but I'm just not getting how to move data around.

My scenario:

I have a UserControl with a DataGrid whose ItemsSource is bound to an ObservableCollection (MyFiles). There's also a property I've defined to hold the SelectedItem (MySelectedFile).

As I select different rows in the DataGrid, I want the contents of <g class="gr_ gr_35 gr-alert gr_spell gr_inline_cards gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="35" id="35">MySelectedFile</g> displayed in UserControlB.

For example...

UserControlA.xaml

<DataGrid ItemsSource="{Binding Path=MyFiles}" SelectedItem="{Binding Path=MySelectedFile}" />

UserControlA.xaml.cs

public ObservableCollection<CustomFileClass> MyFiles { get; set; }
public CustomFileClass MySelectedFile { get; set; }

And then I have a UserControl with various CheckBoxes, TextBoxes, etc... that I want to populate with the data from MySelectedFile in UserControlA.

For example...

UserControlB.xaml

<StackPanel>
    <!-- I'm assuming each attribute (Text, IsChecked, ItemsSource) will be bound to something, I'm just not sure what. -->
    <TextBox x:Name="FileTitle" Text="" />
    <CheckBox x:Name="FileIsActive" IsChecked="" />
    <ListBox x:Name="FileTopics" ItemsSource="" />
</StackPanel>

And then both of these UserControls are displayed in MainWindow.xaml.

<StackPanel>
    <uc:UserControlA />
    <uc:UserControlB />
</StackPanel>

Any help would be appreciated. I feel like once I grasp this concept of getting data from A to B I'll be good to go.

Thanks!

Edit: I don't know why this forum is adding the g tag around MySelectedFile.

解决方案

You've not really explained where those properties are.

Assuming they're in a viewmodel which is the datacontext of mainwindow then you pretty much just have to implement inotifyproperychanged.

Raise property changed in the setter of MSelectedFile ( you need a propfull ) andbind to that in your other usercontrol.

This sample could be interesting:

https://social.technet.microsoft.com/wiki/contents/articles/30564.wpf-uneventful-mvvm.aspx

In there is a collection of chefs and the selectedchef looks like:

private Person selectedChef;
 
public Person SelectedChef
{
    get
    {
        return selectedChef;
    }
    set
    {
        selectedChef = value;
        RaisePropertyChanged();
        DoSomethingWhenChefChanged();
    }
}

You don't need that dosomethingwhenchefchanged.

You could alternatively bind using the / notation and synchronise selected item with current item.

This article shares collections via resources so not what you want in that way but it describes the current item thing.

https://social.technet.microsoft.com/wiki/contents/articles/29859.wpf-tips-bind-to-current-item-of-collection.aspx

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