OxyPlot.Avalonia user error

[wwzorz]

Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:AvaloniaApplication1.ViewModels"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:views="clr-namespace:AvaloniaApplication1.Views"
        xmlns:oxy="using:OxyPlot.Avalonia"
        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
        x:Class="AvaloniaApplication1.Views.MainWindow"
        Icon="/Assets/avalonia-logo.ico"
        Title="AvaloniaApplication1">
  <views:MainView>

    <TabControl>
      <Grid>
        <oxy:PlotView></oxy:PlotView>
      </Grid>
    </TabControl>
  </views:MainView>
</Window

build error:

[Error] 16196 UpdateXamlResult error
System.Xaml.XamlException: “Unable to resolve type PlotView from namespace using:OxyPlot.Avalonia Line 16, position 10.”，行号为“16”，行位置为“10”。

runtime error

System.IO.FileNotFoundException:“Could not load file or assembly 'Avalonia.Visuals, Version=0.10.11.0, Culture=neutral, PublicKeyToken=c8d484a7012f9a8b'. 系统找不到指定的文件。”

请问下为什么会出现编译和运行时错误

[VisualMelon]

That should work: which OxyPlot.Avalonia package are you targetting and have you tried forcing a restore from the command line with dotnet restore? (VS certainly used to mess up sometimes in this regard)

[GoncharovMain]

This is not a solution, but for version template 0.10.18:

dotnet new install Avalonia.Templates::0.10.18
dotnet new avalonia.app

You can use the Content property.
MainWindow.axaml.cs

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        PlotView plotView = new()
        {
            Model = _model,
            Width = 400,
            Height = 300
        };
        
        Grid grid = (Grid)Content;

        grid.Children.Add(plotView);
    }
}

From https://github.com/oxyplot/oxyplot-avalonia
App.axaml

<Application xmlns="https://github.com/avaloniaui"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Class="App1.App">
    <Application.Styles>
	<StyleInclude Source="avares://Avalonia.Themes.Default/DefaultTheme.xaml"/>
	<StyleInclude Source="avares://Avalonia.Themes.Default/Accents/BaseLight.xaml"/>
	<StyleInclude Source="resm:OxyPlot.Avalonia.Themes.Default.xaml?assembly=OxyPlot.Avalonia"/>
    </Application.Styles>
</Application>

MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d" d:DesignWidth="400" d:DesignHeight="250"
        x:Class="App1.MainWindow"
        Title="App1">
	<Grid>
        
	</Grid>
</Window>

[VisualMelon]

Not sure what's going on there... the code-behind shouldn't be necessary: I've just installed the same template, created the project, added the nuget reference and defined a PlotView in sample and it 'just works'. Package reference is

<PackageReference Include="OxyPlot.Avalonia" Version="2.1.0" />

The style include is necessary for the plot to appear, but there shouldn't be an error without it.

My complete example code: https://gist.github.com/VisualMelon/26f19b2a9fed7adf41fe121d7925e49e

[wwzorz]

thank you for reply,this is a version question,use the lower avaliona template can be solved this error!发自我的 iPhone在 2023年9月16日，01:01，VisualMelon ***@***.***> 写道： Not sure what's going on there... the code-behind shouldn't be necessary: I've just installed the same template, created the project, added the nuget reference and defined a PlotView in sample and it 'just works'. Package reference is <PackageReference Include="OxyPlot.Avalonia" Version="2.1.0" /> The style include is necessary for the plot to appear, but there shouldn't be an error without it. My complete example code: https://gist.github.com/VisualMelon/26f19b2a9fed7adf41fe121d7925e49e —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[VisualMelon]

OK. If you are targeting Avalonia 11, you should use the 2.1.0-Avalonia11 nuget version of OxyPlot.Avalonia

[wwzorz]

thanks,you are right，I am using the latest version and have already resolved this issue using a lower version发自我的 iPhone在 2023年9月16日，01:01，VisualMelon ***@***.***> 写道： Not sure what's going on there... the code-behind shouldn't be necessary: I've just installed the same template, created the project, added the nuget reference and defined a PlotView in sample and it 'just works'. Package reference is <PackageReference Include="OxyPlot.Avalonia" Version="2.1.0" /> The style include is necessary for the plot to appear, but there shouldn't be an error without it. My complete example code: https://gist.github.com/VisualMelon/26f19b2a9fed7adf41fe121d7925e49e —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[wwzorz]

Because this is the first time I have been exposed to cross platform solutions, the frameworks have been rebuilt and the latest versions have been used. I didn't pay much attention to version issues. Thank you again发自我的 iPhone在 2023年9月17日，22:13，VisualMelon ***@***.***> 写道： OK. If you are targeting Avalonia 11, you should use the 2.1.0-Avalonia11 nuget version of OxyPlot.Avalonia —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you authored the thread.Message ID: ***@***.***>

[LyubomiRadev]

I am having the same issue. When I try to use oxyPlot I get an erro:
Error: Unable to resolve type Plot from namespace using:OxyPlot.Avalonia Line 11, position 10.
I tried to include the style as mentioned above with resm or avares but I get an error as well(
Error: Unable to resolve XAML resource "avares://AvaloniaApplication1/Designer/OxyPlot.Avalonia.Themes.Default.xaml?
assembly=OxyPlot.Avalonia" in the "AvaloniaApplication1" assembly. Make sure this file exists and is public. Line 9, position 23.). I am using the latest version of Avalonia and the .1.0-Avalonia11 nuget version of OxyPlot.Avalonia.

You can find my code here .
I am using the latest version of Avalonia with OxyPlot.Avalonia 2.1.0.

[VisualMelon]

The link 404s for me. Double check that a restore has been run: VS can get confused sometimes, and running dotnet restore manually can resolve that.

[LyubomiRadev]

Sorry, the repo was not public. You can try again. I tired running dotnet restore but it did not work.

[VisualMelon]

https://github.com/LyubomiRadev/PieChart/blob/master/AvaloniaApplication1/AvaloniaApplication1.csproj#L21C5-L21C68

This should be referencing version 2.1.0-Avalonia11 because you are using Avalonia 11 (per https://github.com/LyubomiRadev/PieChart/blob/master/Directory.Build.props#L4 )

[LyubomiRadev]

So if I understand correctly it should be working, right? So why it isn't :)

[VisualMelon]

The line in the csproj is wrong: it should be

<PackageReference Include="OxyPlot.Avalonia" Version="2.1.0-Avalonia11" />

[LyubomiRadev]

Thank you. That really helped. But now I can't seem to get it working properly. Nothing is displayed in the window. Can you take a look and tell me what I am doing wrong?

[VisualMelon]

You've commented out the style inclue: https://github.com/LyubomiRadev/PieChart/blob/master/AvaloniaApplication1/App.axaml#L9C8-L9C110
Without the styles, the PlotView won't have a visual presence.

[LyubomiRadev]

When I include the Style I get an error: No precompiled XAML found for resm:OxyPlot.Avalonia.Themes.Default.xaml?assembly=OxyPlot.Avalonia (baseUri: avares://AvaloniaApplication1/App.axaml), make sure to specify x:Class and include your XAML file as AvaloniaResource. That is why it was commented.

[VisualMelon]

Oh yes, that's the old one. With Avalonia11 you need this style include:
<StyleInclude Source="avares://OxyPlot.Avalonia/Themes/Default.axaml"/>

[LyubomiRadev]

Fantastic! No building errors whatsoever. But I am not able to display the chart. All I see is the Title of the chart that I've put. I have created the Continents collection as in the example, but I am not able to display the chart. Is the view not detecting the changes in the collection?
Also you say that the StyleInclude I was using was the old one. Where can I get the latest updates? I looked in the documentation but I saw information only about WPF, UWP, WinForms etc. but no Avalonia.

[VisualMelon]

The documentation is pretty patchy, and none of it applies to the Avalonia provision.

You are using compiled bindings, and then using an annoumous type as your data-context: this is asking for trouble. It seems to work fine if you replace it with this.DataContext = this

https://github.com/LyubomiRadev/PieChart/blob/master/AvaloniaApplication1/Views/MainWindow.axaml.cs#L40

Then it will match the declared type

https://github.com/LyubomiRadev/PieChart/blob/master/AvaloniaApplication1/Views/MainWindow.axaml#L10

[LyubomiRadev]

NICE! That work. Thank you for all your help. I am quite new to Avalonia and am not familiar with a lot of things, which is weird, because I worked with WPF for 7 years 😄 Anyway thank you very much :)