Develop Reference

MediaElement set Source property doesn't work

I'm trying to change Source property of MediaElement in my windows-phone application , I have two mp3 files in Assets file :
"/Assets/fail.mp3"
"/Assets/success.mp3"
when I set this proeperty in the designer to /Assets/success.mp3" for example, and invoke :
mediaElement.play();
the sound plays properly , but I want to change the source in my code and then play the sound again , I've tried these options :
mediaElement.Source = new Uri(BaseUri, "/Assets/fail.mp3");
mediaElement.Source = new Uri("ms-appx:///Assets/fail.mp3", UriKind.RelativeOrAbsolute);
mediaElement.Source = new Uri("/Assets/fail.mp3", UriKind.RelativeOrAbsolute);
mediaElement.Source = new Uri("/Assets/fail.mp3");
but none of them works I got no error with no sound !, any one have an Idea what to do ?

This is UWP? Maybe you need to update your resource strings as shown here:
Uri syntax in ResourceDictionary Source (Universal Windows Platform)

UWP - Image Uri in Application Folder

I'm having a little issue here in showing images.
So when I'm trying to load images from XAML, I can use a relative uri to the image source like this :
<Image Source="/Assets/image.jpg" />
But if I try to change the image source programatically from code behind, I always get an exception and I'm sure it's because of the false Uri. I tried something like this :
BitmapImage bitmapImage = new BitmapImage(new Uri("/Assets/image.jpg"));
Am I doing it wrong? Any help will be appreciated, thanks!

You can also use it with BaseUri.
BitmapImage bitmapImage = new BitmapImage(new Uri(this.BaseUri, "/Assets/image.jpg"));
Assets is a folder name and you can change it with your any custom folder name :)

To access files stored inside the application package, but from code where there is no inferred root authority, you need to specify the ms-appx: scheme :
So in your case it will be something like :
BitmapImage bitmapImage =
new BitmapImage(new Uri("ms-appx:///[project-name]/Assets/image.jpg"));
Read this documentation for more details : https://msdn.microsoft.com/en-us/library/windows/apps/xaml/hh965322.aspx
Hope it helps.

I believe WPF is more forgiving and paths like "Assets/image.png" are possible. If you are writing a UWA (win 10) app then you need to use the "ms-appx" URI's.
My experience is "ms-appx:///Assets/image.png" works fine.
Yes, three "/"s (!) and no need for the name of the app in the path.

Image img = new Image();
img.Source = new BitmapImage(new Uri("http://www.contoso.com/images/logo.png"));

Just use it like this
<Image Source="Assets/image.jpg" />

WPF C# Bitmap resource as Imagesource for ImageBrush [duplicate]

I want to change the background of a button manually in my WPF app.
I have an image imported into my resources and I want to do:
MyButton.Background = MyProject.Properties.Resources.myImage;
But I get the error:
cannot implicitly convert system.drawing.bitmap to media.brush
How can I do this??

You should read about brushes first here.
And then use ImageBrush, something like this:
MyButton.Background = new ImageBrush(...);
(or, maybe, put the brush into resources...)
UPDATE
You can find how to create imageSource from bitmap easilly. for example, here. Like:
var bitmapSource = Imaging.CreateBitmapSourceFromHBitmap(MyProject.Properties.Resources.myImage.GetHbitmap(),
IntPtr.Zero,
Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
MyButton.Background = new ImageBrush(bitmapSource);

In a WPF application, you do usually not add image resources as you did in WinForms.
Instead you add the image file directly to your Visual Studio project, just like any other file. If there are multiple images, it may make sense to put them in a subfolder of the project (e.g. called "images"). The Build Action of that file has to be set to Resource (which is the default for image files).
Now you can create a BitmapImage from a Pack URI to that file.
Finally you create an ImageBrush from the BitmapImage to set the Background property.
var uri = new Uri("pack://application:,,,/images/myImage.jpg");
var image = new BitmapImage(uri);
MyButton.Background = new ImageBrush(image);

Change image source using C#

I'm creating a windows store app and was wondering how to change the image source using C# I have included the following directive;
using Windows.UI.Xaml.Media.Imaging;
and this is the line I have to try and change the image
cloud.Source = new BitmapImage(new Uri("Assets/cloud1.png", UriKind.Relative));
cloud is the name of the image tag and cloud1 is the source I want to change it to.. but it gives me this error...
"The given System.Uri cannot be converted into a Windows.Foundation.Uri"
Any help appreciated! thanks in advance

Use
cloud.Source = new BitmapImage(new Uri("ms-appx:/Assets/cloud1.png", UriKind.Relative));
instead.

WPF Dynamic Image Loading into ResourceDictionary programmatically

Morning folks,
I've been trying to cut out some of my app's processing when I stumbled upon a suggestion on SO to load all images into a resource dictionary via BitmapImages, then referencing them rather than loading an image each time. My problem is that I need to do this all programmatically, so:
<BitmapImage x:Key="MyImageSource" UriSource="../Media/Image.png" />
has become:
BitmapImage bI = new BitmapImage();
Uri imgUri = new Uri(fI.FullName, UriKind.RelativeOrAbsolute);
bI.UriSource = imgUri;
DataTemplateKey dTK = new DataTemplateKey(typeof(BitmapImage));
imageDictionary.Add(dTK, bI);
Which I think should work, but as it loops due to the images loading based on database content, I immediatly get a key already added error on the second loop-through. Is there any way to create a datatemplatekey that I can name myself rather than have it based on the type?
Thanks,
Becky

It is not possible to add a key to the datatemplate but maybe you fix your problem by creating a DataTemplateSelector. On the link below you can find very good information on how to do that:
http://www.switchonthecode.com/tutorials/wpf-tutorial-how-to-use-a-datatemplateselector