CODEWITHSUNDEEP
c#wpfmvvmservice-locator
user7998549
user7998549

Reputation: 131

Create a reference to Locator in a ResourceDictionary

I have a WPF Custom Control Library with MVVM Libraries.

In Dictionary I have:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:local="clr-namespace:WpfCustomControlLibrary2"
                    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
                    d1p1:Ignorable="d"
                    xmlns:d1p1="http://schemas.openxmlformats.org/markup-compatibility/2006">
<local:ViewModelLocator x:Key="Locator"
                        d:IsDataSource="True" />

And in Window.xaml I try to use that Locator:

<Window x:Class="WPFCustomeControlLibrary.Window"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        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"
        Title="Window" Height="300" Width="300"
        DataContext="{Binding MainViewModel, Mode=OneWay, Source={StaticResource Locator}}">
<Window.Resources>
    <ResourceDictionary Source="Dictionary.xaml" />
</Window.Resources>
<Grid>

</Grid>

But it still says 'The resource 'Locator' could not be resolved'.

Locator is my ViewModelLocator where my MainViewModel is defined.

Upvotes: 0

Views: 317

Answers (1)

mm8
mm8

Reputation: 169340

Put it in App.xaml:

<Application x:Class="WpfApplication1.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:WpfApplication5" 
             StartupUri="MainWindow.xaml">
  <Application.Resources>
    <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="Dictionary.xaml" />
            </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Application.Resources>
</Application>

The resource cannot be defined in the window since it needs to be resolved before the DataContext is set.

The other option would be to set the DataContext of the Grid instead of the Window:

<Window x:Class="WPFCustomeControlLibrary.Window"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        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"
        Title="Window" Height="300" Width="300">
    <Window.Resources>
        <ResourceDictionary Source="Dictionary.xaml" />
    </Window.Resources>
    <Grid DataContext="{Binding MainViewModel, Mode=OneWay, Source={StaticResource Locator}}">

    </Grid>
</Window>

Upvotes: 1

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