MvvmCross导航以打开新窗口并保持原始窗口打开。

huangapple
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英文:

MvvmCross Navigation to open a New Windows and let the original be open

问题

I wish to open a new window and not a view inside another window. I have a notify icon with a menu from the menu I want to open a new windows from my MainViewModel. Can that be done? It comes up with this error:

希望打开一个新窗口而不是在另一个窗口内部显示视图。我有一个带有菜单的通知图标，我希望从菜单中从我的 MainViewModel 打开一个新窗口。这可以做到吗？出现以下错误：

System.InvalidOperationException
HResult=0x80131509
Message=Window must be the root of the tree. Cannot add Window as a child of Visual.
Source=PresentationFramework

The lines I doubt is this in my MainView Xaml <views:MvxWpfView>

我怀疑的行是在我的 MainView Xaml 中的 <views:MvxWpfView>

  1. <MenuItem Header="Settings" mvx:Bi.nd="Command SettingsCommand">
  2.     <MenuItem.Icon>
  3.         <Image Width="16" Height="16" Source="/Images/settings.png"/>
  4.     </MenuItem.Icon>
  5. </MenuItem>
  1. <MenuItem Header="Settings" mvx:Bi.nd="Command SettingsCommand">
  2.     <MenuItem.Icon>
  3.         <Image Width="16" Height="16" Source="/Images/settings.png"/>
  4.     </MenuItem.Icon>
  5. </MenuItem>

In my view model where I am calling the new window from is this code:

在我的视图模型中，我从中调用新窗口的代码如下：

  1. public class MainViewModel : MvxViewModel
  2. {
  3.     private readonly IMvxNavigationService navigationService;
  4.     public IMvxCommand SettingsCommand { get; set; }
  6.     public MainViewModel(IMvxNavigationService _navigationService) 
  7.     {
  8.         navigationService = _navigationService;
  9.         GenerateMenu();
  10.         ExitCommand = new MvxCommand(Exit);
  12.         SettingsCommand = new MvxAsyncCommand(async () => await navigationService.Navigate<BolusViewModel>());
  13.     }
  14. }
  1. public class MainViewModel : MvxViewModel
  2. {
  3.     private readonly IMvxNavigationService navigationService;
  4.     public IMvxCommand SettingsCommand { get; set; }
  6.     public MainViewModel(IMvxNavigationService _navigationService) 
  7.     {
  8.         navigationService = _navigationService;
  9.         GenerateMenu();
  10.         ExitCommand = new MvxCommand(Exit);
  12.         SettingsCommand = new MvxAsyncCommand(async () => await navigationService.Navigate<BolusViewModel>());
  13.     }
  14. }

The view model I am try to open as a new window looks like this:

我要尝试作为新窗口打开的视图模型如下：

  1. public class BolusViewModel : MvxViewModel
  2. {
  3.     private readonly IMvxNavigationService navigationService;
  5.     public BolusViewModel(IMvxNavigationService _navigationService)
  6.     { 
  7.         navigationService = _navigationService;
  8.     }
  9. }
  1. public class BolusViewModel : MvxViewModel
  2. {
  3.     private readonly IMvxNavigationService navigationService;
  5.     public BolusViewModel(IMvxNavigationService _navigationService)
  6.     { 
  7.         navigationService = _navigationService;
  8.     }
  9. }

And last the window that is trying to open looks like this - code behind:

最后，试图打开的窗口如下 - 代码后台：

  1. [MvxContentPresentation]
  2. [MvxWindowPresentation(Identifier = nameof(BolusViewModel), Modal = false)]
  3. public partial class BolusView : MvxWindow
  4. {
  5.     public BolusView()
  6.     {
  7.         InitializeComponent();
  8.     }
  9. }
  1. [MvxContentPresentation]
  2. [MvxWindowPresentation(Identifier = nameof(BolusViewModel), Modal = false)]
  3. public partial class BolusView : MvxWindow
  4. {
  5.     public BolusView()
  6.     {
  7.         InitializeComponent();
  8.     }
  9. }

Xaml:

XAML：

  1. <views:MvxWindow
  2.     xmlns:views="clr-namespace:MvvmCross.Platforms.Wpf.Views;assembly=MvvmCross.Platforms.Wpf"
  3.     xmlns:mvx="clr-namespace:MvvmCross.Platforms.Wpf.Binding;assembly=MvvmCross.Platforms.Wpf"
  4.     x:Class="TechnicalToolboxV3.Wpf.BolusView"
  5.     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  6.     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  7.     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
  8.     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
  9.     xmlns:Behaviors="http://schemas.microsoft.com/xaml/behaviors"
  10.     xmlns:local="clr-namespace:TechnicalToolboxV3.Wpf"
  11.     xmlns:converters="clr-namespace:TechnicalToolboxV3.Wpf.Converters"
  12.     mc:Ignorable="d" 
  13.     d:DesignHeight="700" d:DesignWidth="1200" FontSize="14" Title="Bolus Controller" Icon="../Images/Bolus.jpg" Background="#FFBEBEBE" Cursor="{Binding MouseIcon, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}">
  14.     <views:MvxWindow.Resources>
  15.         <converters:SystemColorToSolidBrushConverter xKey="ColorConvert"/>
  16.     </views:MvxWindow.Resources>
  17. </views:MvxWindow>
  1. <views:MvxWindow
  2.     xmlns:views="clr-namespace:MvvmCross.Platforms.Wpf.Views;assembly=MvvmCross.Platforms.Wpf"
  3.     xmlns:mvx="clr-namespace:MvvmCross.Platforms.Wpf.Binding;assembly=MvvmCross.Platforms.Wpf"
  4.     x:Class="TechnicalToolboxV3.Wpf.BolusView"
  5.     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  6.     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  7.     xmlns:mc="http://schemas.openxmlformats.org/mark-up-compatibility/2006" 
  8.     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
  9.     xmlns:Behaviors="http://schemas.microsoft.com/xaml/behaviors"
  10.     xmlns:local="clr-namespace:TechnicalToolboxV3.Wpf"
  11.     xmlns:converters="clr-namespace:TechnicalToolboxV3.Wpf.Converters"
  12.     mc:Ignorable="d" 
  13.     d:DesignHeight="700" d:DesignWidth="1200" FontSize="14" Title="Bolus Controller" Icon="../Images/Bolus.jpg" Background="#FFBEBEBE" Cursor="{Binding MouseIcon, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}">
  14.     <views:MvxWindow.Resources>
  15.         <converters:SystemColorToSolidBrushConverter xKey="ColorConvert"/>
  16.     </views:MvxWindow.Resources>
  17. </views:MvxWindow>
英文:

I wish to open a new window and not a view inside another window. I have a notify icon with a menu from the menu I want to open a new windows from my MainViewModel. Can that be done? It comes up with this error:

> System.InvalidOperationException
> HResult=0x80131509
> Message=Window must be the root of the tree. Cannot add Window as a child of Visual.
> Source=PresentationFramework

The lines I doubt is this in my MainView Xaml &lt;views:MvxWpfView&gt;

  1. &lt;MenuItem Header=&quot;Settings&quot;  mvx:Bi.nd=&quot;Command SettingsCommand&quot;&gt;
  2.        &lt;MenuItem.Icon&gt;
  3.            &lt;Image Width=&quot;16&quot; Height=&quot;16&quot; Source=&quot;/Images/settings.png&quot;/&gt;
  4.         &lt;/MenuItem.Icon&gt;
  5. &lt;/MenuItem&gt;

In my view model where I am calling the new window from is this code:

  1. public class MainViewModel : MvxViewModel
  2. {
  3.     private readonly IMvxNavigationService navigationService;
  4.     public IMvxCommand SettingsCommand { get; set; }
  6.     public MainViewModel( IMvxNavigationService _navigationService) 
  7.     {
  8.         navigationService = _navigationService;
  9.         GenerateMenu();
  10.         ExitCommand = new MvxCommand(Exit);
  12.         **SettingsCommand = new MvxAsyncCommand(async () =&gt; await  navigationService.Navigate&lt;BolusViewModel&gt;()); ** 
  13.     }
  14. }

The view model I am try to open as a new window looks like this:

  1. public class BolusViewModel : MvxViewModel
  2. {
  3.     private readonly IMvxNavigationService navigationService;
  5.     public BolusViewModel(IMvxNavigationService _navigationService)
  6.     { 
  7.         navigationService = _navigationService;
  8.     }
  9. }

And last the window that is trying to open looks like this - code behind:

  1. [MvxContentPresentation]
  2. [MvxWindowPresentation(Identifier =  nameof(BolusViewModel), Modal = false)]
  3. public partial class BolusView : MvxWindow
  4. {
  5.     public BolusView()
  6.     {
  7.         InitializeComponent();
  8.     }
  9. }

Xaml:

  1. &lt;views:MvxWindow
  2.                   xmlns:views=&quot;clr-          namespace:MvvmCross.Platforms.Wpf.Views;assembly=MvvmCross.Platforms.Wpf&quot;
  3.                    xmlns:mvx=&quot;clr-      namespace:MvvmCross.Platforms.Wpf.Binding;assembly=MvvmCross.Platforms.Wpf&quot;
  4.              x:Class=&quot;TechnicalToolboxV3.Wpf.BolusView&quot;
  5.              xmlns=&quot;http://schemas.microsoft.com/winfx/2006/xaml/presentation&quot;
  6.              xmlns:x=&quot;http://schemas.microsoft.com/winfx/2006/xaml&quot;
  7.              xmlns:mc=&quot;http://schemas.openxmlformats.org/markup-compatibility/2006&quot; 
  8.              xmlns:d=&quot;http://schemas.microsoft.com/expression/blend/2008&quot; 
  9.              xmlns:Behaviors=&quot;http://schemas.microsoft.com/xaml/behaviors&quot;
  10.              xmlns:local=&quot;clr-namespace:TechnicalToolboxV3.Wpf&quot;
  11.              xmlns:converters=&quot;clr-namespace:TechnicalToolboxV3.Wpf.Converters&quot;
  12.              mc:Ignorable=&quot;d&quot; 
  13.              d:DesignHeight=&quot;700&quot; d:DesignWidth=&quot;1200&quot; FontSize=&quot;14&quot; Title=&quot;Bolus Controller&quot; Icon=&quot;..\Images\Bolus.jpg&quot; Background=&quot;#FFBEBEBE&quot; Cursor=&quot;{Binding MouseIcon, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}&quot;&gt;
  14.     &lt;views:MvxWindow.Resources&gt;
  15.         &lt;converters:SystemColorToSolidBrushConverter x:Key=&quot;ColorConvert&quot;/&gt;
  16.     &lt;/views:MvxWindow.Resources&gt;
  17. &lt;/views:MvxWindow&gt;

答案1

得分: 0

这似乎在起作用...我从我想要打开的窗口的代码中删除了这些行。

[MvxContentPresentation]
[MvxWindowPresentation(Identifier = nameof(BolusViewModel), Modal = false)]

XAMIMAX，谢谢你提出这一点，它给了我一个线索，让我知道应该寻找什么，谢谢。

英文:

This Seems to be working... I removed these lines from my Code behind on the window i wanted to open.

  1. [MvxContentPresentation]
  2.           [MvxWindowPresentation(Identifier =  nameof(BolusViewModel), Modal = false)]

XAMIMAX Thanks for make that point, it gave me a glue for what i should be looking for, Thanx

huangapple
  • 本文由 发表于 2023年3月3日 23:43:38
  • 转载请务必保留本文链接：https://go.coder-hub.com/75629148.html
  • c#
  • mvvmcross
  • wpf
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