How do i create a global object in xaml?

Question

I have a wpf navigation application. I have an object that i want to access from different pages. Currently, the object is only available from the page that creates it.

Here what I did.

In page A.xaml

I defined in the page like so

<UserControl.Resources>
    <local:SerialComm x:Key="SerialCommDataSource" d:IsDataSource="True" />
</UserControl.Resources>

Above method works except the scope is only limited to the page. I want to be able to access the object from any other page.

I use the object in the page like so

<Grid Style="{StaticResource ContentRoot}" DataContext="{Binding Source={StaticResource SerialCommDataSource}}" >
    <TextBox x:Name="tbbaudRate" Height="23" TextWrapping="Wrap" MinWidth="200" Text="{Binding SerialPort.BaudRate}" />
</Grid>

I want to put the resource in App.xaml so that I can access it anywhere.

<Application.Resources>
    <ResourceDictionary>
        <ResourceDictionary.MergedDictionaries>
            <ResourceDictionary Source="/Blah;component/Assets/Blah.xaml" />
        </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
    <local:SerialComm x:Key="SerialCommDataSource" d:IsDataSource="True" /> <--Error here
</Application.Resources>

How do i create a global object in xaml? The object must be able to be edited anywhere and edited values are updated. I read that one cannot create object in code behind and access it anywhere in xaml. So how do i do this in xaml?

You are probably just missing the `d:` (designtime) namespace. — H H, Mar 29 '13 at 10:30
sorry for not adding actual error message. and youre right im missing the d:. all good now. thanks and sorry. — Syaiful Nizam Yahya, Mar 29 '13 at 11:09
You should still add the error. For future googlers with the same problem. — H H, Mar 29 '13 at 11:18

score 0 · Answer 1 · answered Mar 29 '13 at 11:12

0

The problem is missing the d: namespace

answered Mar 29 '13 at 11:12

Syaiful Nizam Yahya

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How do i create a global object in xaml?

1 Answers1