C#•8mo ago

✅ Abstract classes as the WPF DesignContext?

Does it matter if the value in d:DesignContext="{d:DesignInstance Type=X}" is an abstract class. I can't get the WPF design to acknowledge my type. I know some of you guys have said not to rely on it, but it does help from time to time and I at least like the design context set. I've tried deleting the bin and obj folders for that project and restarting VS. Didn't help.

<Base:AbstractVisualConversationTabCtrl
    x:Class="BestChat.IRC.Global.View.ConversationViewCtrl"
    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:local="clr-namespace:BestChat.IRC.Global.View"
    xmlns:Base="clr-namespace:BestChat.GUI.Ctrls;assembly=BestChat.GUI.Ctrls"
    xmlns:OurDataCtxt="BestChat.Platform.Conversations;Assembly=BestChat.Platform.Conversations"
    xmlns:DataDefs="clr-namespace:BestChat.IRC.Data.Defs;assembly=BestChat.IRC.Data"
    xmlns:CalcBinding="clr-namespace:CalcBinding;assembly=CalcBinding"
    xmlns:Emoji="clr-namespace:Emoji.Wpf;assembly=Emoji.Wpf"
    xmlns:Ctrls="clr-namespace:BestChat.IRC.Global.View.Ctrls;assembly=BestChat.IRC.Global.View.Ctrls"
    xmlns:GuiCtrls="clr-namespace:BestChat.GUI.Ctrls;assembly=BestChat.GUI.Ctrls"
    d:DataContext="{x:Type d:DesignInstance Type=OurDataCtxt:AbstractConversation}"
    mc:Ignorable="d">

<Base:AbstractVisualConversationTabCtrl
    x:Class="BestChat.IRC.Global.View.ConversationViewCtrl"
    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:local="clr-namespace:BestChat.IRC.Global.View"
    xmlns:Base="clr-namespace:BestChat.GUI.Ctrls;assembly=BestChat.GUI.Ctrls"
    xmlns:OurDataCtxt="BestChat.Platform.Conversations;Assembly=BestChat.Platform.Conversations"
    xmlns:DataDefs="clr-namespace:BestChat.IRC.Data.Defs;assembly=BestChat.IRC.Data"
    xmlns:CalcBinding="clr-namespace:CalcBinding;assembly=CalcBinding"
    xmlns:Emoji="clr-namespace:Emoji.Wpf;assembly=Emoji.Wpf"
    xmlns:Ctrls="clr-namespace:BestChat.IRC.Global.View.Ctrls;assembly=BestChat.IRC.Global.View.Ctrls"
    xmlns:GuiCtrls="clr-namespace:BestChat.GUI.Ctrls;assembly=BestChat.GUI.Ctrls"
    d:DataContext="{x:Type d:DesignInstance Type=OurDataCtxt:AbstractConversation}"
    mc:Ignorable="d">

Then inside BestChat.Platform.Conversations.dll, we have BestChat.Platform.Conversations.AbstractConversation. Those appear to match to me.

namespace BestChat.Platform.Conversations
{
    public abstract class AbstractConversation
.
.
.
}

namespace BestChat.Platform.Conversations
{
    public abstract class AbstractConversation
.
.
.
}

14 Replies

JakenVeina•8mo ago

if you've tried it and it doesn't work, I'd have to say "yes, it matters"

Will Pittenger•8mo ago

In which case, the error should be the class was abstract.

Unknown User•8mo ago

Message Not Public

Will Pittenger•8mo ago

Please remember I don't need design time data. Just making sure the property names are valid.

JakenVeina•8mo ago

yeah, the syntax is fine I use it myself, regularly but yeah, doesn't work for abstract classes oh wait no @TeBeClone is right, the alternative syntax does work use {x:Type} to do the type lookup works fine

Will Pittenger•8mo ago

I tried that.

JakenVeina•8mo ago

then you're doing something else wrong even works with an abstract generic

d:DataContext="{d:DesignInstance Type={x:Type gamespace:GameBoardViewModelBase`1}}"

d:DataContext="{d:DesignInstance Type={x:Type gamespace:GameBoardViewModelBase`1}}"

I now get intellisense on all the other bindings

Unknown User•8mo ago

Message Not Public

Will Pittenger•8mo ago

Except I tried d:DataContext="{d:DesignInstance Type={x:Type OurDataCtxt:AbstractConversation}}" too.

JakenVeina•8mo ago

¯\_(ツ)_/¯ wOrKs On My MaChInE

Unknown User•8mo ago

Message Not Public

Will Pittenger•8mo ago

.NET 7.0 in VS 2022?

JakenVeina•8mo ago

this one's actually net6.0-windows but it shouldn't matter so long as it's .NET 5+ or was it 6 when WPF was added?

Will Pittenger•8mo ago

Well, I took the DesignInstance stuff out for now. I'm back to trying to resolve https://discord.com/channels/143867839282020352/1170760309410107473.

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✅ Abstract classes as the WPF DesignContext?