Binding Source

Steve1000 · August 2020

Hi,

I want to set a string in another class say App.Xaml.cs

public string MyValue = "somevalue";

How can i bind the text of a label to that MyValue item? I'm not sure how the Databinding source works or how I need to wire it up.

I've tried this which didnt work...

<Label Text = {Binding MyValue, Source={x:Static local:App.MyValue}} />

I've got a static piece of text that I want to display on multiple pages so thought to put it in one place and then try and bind to that so that when I need to change it i can change it in one place.

ColeX · August 2020

First , we need to make MyValue to be static in App .

public  static string MyValue = "somevalue";

Then modify the binding in xaml

<Label Text ="{x:Static local:App.MyValue}" />

Refer to

https://docs.microsoft.com/en-us/xamarin/xamarin-forms/xaml/xaml-basics/xaml-markup-extensions#the-xstatic-markup-extension

JoeManke · August 2020

I would define it as a resource in your App.xaml file and use it via the StaticResource markup extension.

<?xml version="1.0" encoding="utf-8"?>
<Application xmlns="http://xamarin.com/schemas/2014/forms" 
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"  
             x:Class="MyNamespace.MyApp">
    <Application.Resources>
        <ResourceDictionary>
            <x:String x:Key="MyValue">somevalue</x:String>
        </ResourceDictionary>
    </Application.Resources>
</Application>

<Label Text="{StaticResource MyValue}" />

ColeX · August 2020

First , we need to make MyValue to be static in App .

public  static string MyValue = "somevalue";

Then modify the binding in xaml

<Label Text ="{x:Static local:App.MyValue}" />

Refer to

https://docs.microsoft.com/en-us/xamarin/xamarin-forms/xaml/xaml-basics/xaml-markup-extensions#the-xstatic-markup-extension

Steve1000 · August 2020

@ColeX said:
First , we need to make MyValue to be static in App .

public static string MyValue = "somevalue";

Then modify the binding in xaml
<Label Text ="{x:Static local:App.MyValue}" />
Refer to

https://docs.microsoft.com/en-us/xamarin/xamarin-forms/xaml/xaml-basics/xaml-markup-extensions#the-xstatic-markup-extension

perfect - thanks!

Xamarin

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