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Showing content from https://github.com/brianchance/MvvmCross-UserInteraction below:

brianchance/MvvmCross-UserInteraction: MvvmCross plugin for interacting with the user from a view model

MvvmCross plugin for interacting with the user from a view model. ##Features

1. Alert - simple alert to the user, async or optional callback when done
2. Confirm - dialog with ok/cancel, async or callback with button clicked or just when ok clicked
3. Input - asks user for input with ok/cancel, async or callback with button clicked and data or just data when ok clicked

##Usage ####Alert Async

public ICommand SubmitCommand
{
		get
		{
			return new MvxCommand(async () =>
					                      {
					                        if (string.IsNullOrEmpty(FirstName)) 
					                        {
					                          await Mvx.Resolve<IUserInteraction>().AlertAsync("First Name is Required");
					                          return;
					                        }
					                        //do work
					                      });
		}
}

####Alert callback

public ICommand SubmitCommand
{
		get
		{
			return new MvxCommand(() =>
					                      {
					                        if (string.IsNullOrEmpty(FirstName)) 
					                        {
					                          Mvx.Resolve<IUserInteraction>().Alert("First Name is Required");
					                          return;
					                        }
					                        //do work
					                      });
		}
}

####Confirm/Input Async

public ICommand SubmitCommand
{
		get
		{
			return new MvxCommand(async () =>
					                      {
					                        if (await Mvx.Resolve<IUserInteraction>().ConfirmAsync("Are you sure?"))
					                        {
					                        	//do work
					                        }
					                       });
		}
}

####Confirm/Input callback

public ICommand SubmitCommand
{
		get
		{
			return new MvxCommand(() =>
					                      {
					                        Mvx.Resolve<IUserInteraction>().Confirm("Are you sure?", async () => 
					                          {
					                            //Do work
					                          });
					                      });
		}
}

##Adding to your project

1. Follow stuarts directions (step 3) - http://slodge.blogspot.com/2012/10/build-new-plugin-for-mvvmcrosss.html
2. Grab the UserInteractionPluginBootstrap file from appropriate Droid/Touch folder. Drop into your project in the Bootstrap folder, change the namespace.

I will be working on a nuget package as time permits.

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