public T GetDataContext <T>(string sceneName)
{
sceneName.ThrowIfNullOrEmpty(nameof(sceneName));
SceneItem sceneItem = GetSceneItem(sceneName);
if (!(sceneItem.Content.DataContext is T control))
{
throw new ArgumentException(
$"Content of scene with name \"{sceneName}\" is not convertable to " +
$"{typeof(T).FullName}.",
nameof(sceneName)
);
}
return(control);
}
public void AddScene(string sceneName, UserControl content)
{
sceneName.ThrowIfNullOrEmpty(nameof(sceneName));
content.ThrowIfNull(nameof(content));
if (Contains(sceneName))
{
throw new ArgumentException(
$"Scene with name \"{sceneName}\" has already been added to the scene " +
$"collection.",
nameof(sceneName)
);
}
var newScene = new SceneItem(sceneName, content);
_sceneItems.Add(newScene);
}