Collection of MVVM helper classes for any application.
Checkout this awesome video I made introducing you to MVVM Helpers :)
I wanted to keep this library really small and just created it for myself, but I hope others find it useful. Here is what I added in and feel free to request new things in the Issues tab.
Simple implementation of INotifyPropertyChanged that any class can inherit from.
/// <summary> /// Sets the property. /// </summary> /// <returns><c>true</c>, if property was set, <c>false</c> otherwise.</returns> /// <param name="backingStore">Backing store.</param> /// <param name="value">Value.</param> /// <param name="propertyName">Property name.</param> /// <param name="onChanged">On changed.</param> /// <typeparam name="T">The 1st type parameter.</typeparam> protected bool SetProperty<T>( ref T backingStore, T value, [CallerMemberName]string propertyName = "", Action onChanged = null)
// <summary> /// Raises the property changed event. /// </summary> /// <param name="propertyName">Property name.</param> protected void OnPropertyChanged([CallerMemberName]string propertyName = "")
Your base view model! It implements INotifyPropertyChanged and a bunch of default properties such as Title, SubTitle, Icon, IsBusy, IsNotBusy, CanLoadMore.
Best way to group items into a Key/Value pair ObservableCollection for managing groups of data. See my blog post: Enhancing Xamarin.Forms ListView with Grouping Headers
A super awesome ObservableCollection that adds important methods such as: AddRange, RemoveRange, Replace, and ReplaceRange.
Any and all extension methods that are nifty. Here are the current ones:
/// <summary> /// Task extension to add a timeout. /// </summary> /// <returns>The task with timeout.</returns> /// <param name="task">Task.</param> /// <param name="durationMilliseconds">Duration in Milliseconds.</param> /// <typeparam name="T">The 1st type parameter.</typeparam> public async static Task<T> WithTimeout<T>(this Task<T> task, int durationMilliseconds)
AsyncCommand, Command, and WeakEventManager
MVVM Helpers now adds in AsyncCommand and Command under the
MvvmHelpers.Commands namespace! It also has a nice WeakEventManager to help your events be garbage collection safe :)
Code & Inspiration from the following:
- AsyncCommand blog from John Thiriet
- AsyncAwaitBestPracties by @brminnick
- Xamarin.Forms Command and WeakEventManager
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