从代码中访问资源以设置NotifyIcon.Icon

Question

I am trying to get the Icon of a NotifyIcon in WPF.

So I have added a .ico file to my solution in a Resources folder and set the build action to Resource .

I am trying to grab this resource in code behind like so:

var icon = (Icon) Application.Current.FindResource("/Resources/icon.ico")

This doesn't work.

In addition to this: Application.Current.Resources.Count returns 0 .

EDIT

var i = new Icon(Application.GetResourceStream(new Uri("/systemtrayicon.ico", UriKind.Relative)).Stream);

With the icon in the root and the build action set to Resource .

Still not working.

EDIT AGAIN:

I needed to Clean the solution and rebuild as per: WPF throws "Cannot locate resource" exception when loading the image

Answer 1

This will works 100%

ni.Icon = new Icon(Application.GetResourceStream(new Uri("pack://application:,,,<Image Location From root>")).Stream);

Example:

notify.Icon = new Icon(Application.GetResourceStream(new Uri("pack://application:,,,/images/favicon.ico")).Stream);

Answer 2

You have to pass resourceName as a parameter to the FindResource method, not the path for the Resource. Sample code would look like:

var icon = (Icon) Application.Current.FindResource("myImage")

Please note in the above sample code "myImage" is the resource name.

Refer to Application.FindResource Method on MSDN.

You say, Application.Current.Resources.Count is Zero, that means you do not have any Resource defined in your App.xaml file.

You can add resources to App.xaml like this:

<Application.Resources>
     <Image x:Key="myImage" Source="img.png" />
</Application.Resources>

It appears that your icon is an embedded resource. FindResource cannot work with embedded resources. Set BuildAction of your icon to Resource .

Refer to this MSDN page for more reading on WPF Resources.

UPDATE

Code for accessing Embedded Resources

Assembly.GetExecutingAssembly().GetManifestResourceStream("myImg.png");

However, if you had added this image to the Resources.Resx and you should simply be able to use Resources.ResourceName .

UPDATE 2

Adding resources to App.xaml or any ResourceDictionary is better, so that you can use them as Static/Dynamic resources via StaticResource or DynamicResource markup extensions.

If you do not want to add it to App.xaml resources and still want to access it, one option as I mentioned above is to add it to the Resources.Resx and use Resources.ResourceName to refer the icon/image

Another way is to create System.Drawing.Icon by yourself, sample code:

new System.Drawing.Icon(Application.GetResourceStream(new Uri("/Resources/icon.ico")));

Personally, I would go with XAML resources and add them to App.xaml or a ResourceDictionary.