CODEWITHSUNDEEP
c#silverlightxamlwindows-phone-7windows-phone-8
Wojciech Sobczyk
Wojciech Sobczyk

Reputation: 343

silverlight xaml can't get nullable double

In my app resources i have:

<Application.Resources>
    <System:Double x:Key="DefaultMargin">15.0</System:Double>
    ...

now in code behind i try to get the value 

double? margin = Resources["DefaultMargin"] as double?;

but it's always null,

My question is: How can I set a const double in my app so that I can get it from xaml and C#

EDIT: tip: I'm working on WP7/8

Upvotes: 0

Views: 135

Answers (2)

ΩmegaMan
ΩmegaMan

Reputation: 31626

Define the value in question on your ViewModel (or whatever your page's context is set to which adheres to INotifyPropertyChanged) and access it that way on both levels.

If you have to access it on the resource then set it like:

myWindow.Resources.Add("myResourceKey", myViewModel.myValue);

access it in xaml as via a StaticResource 

"{StaticResource myResourceKey}"

or as mentioned even binding

"{Binding myValue}"

Hence there are three ways to get at the value.

Upvotes: 0

Sriram Sakthivel
Sriram Sakthivel

Reputation: 73472

Am not sure about silverlight but in wpf this works. You need to access App.Current.Resources since you're storing it there.

double? margin = App.Current.Resources["DefaultMargin"] as double?;

Upvotes: 1

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