I'm afraid that WebScheduler 3 has now been discontinued for several years and there are not going to be any further updates for it. We have introduced full support for IE 11 and Google Chrome browser in WebScheduler 4.

You can download a 30-day, fully functional, trial version to experience WebScheduler 4 control.

There is a way to show translucent background on a modal popup using Crosslight way.

Crosslight has UIBlurView which can be used with modal view using special technique. Currently the Crosslight development team is working to support this scenario. I'll get back to you as soon as I heard anything from the team regarding this scenario.

I created a simple sample of WebGrid where the datasource is DataTable; and was able to export WebGrid's data to XML without any problems. Please find my sample in the attachment; test it on your end; and let me know if you have different result.

For your information, I'm using the latest version of WebGrid 8 in my local end.

I use button with DelegateCommand and do the following to clear the CheckedItems property.

private void ExecuteClearCheckedItems(object obj)
{
    (CheckedItems as IList).Clear();
}

Clicking the button will clear the checked items in the UXGridView (please ensure that the binding Mode has been set to TwoWay).

Hope this helps.

You can safely pass the repository class for the ViewModel by using Injection of Container technique.

The contructor of ExpenseListViewModel should look like following:

public ExpenseListViewModel()
{
    ...
    this.SourceItems = this.Repository.GetAll().ToObservable();
    ...
}

private IItemRepository Repository
{
    get
    {
        if (Container.Current.CanResolve<IItemRepository>())
            return Container.Current.Resolve<IItemRepository>();
        else
            return new ItemRepository(); // for designer support
    }
}

The IItemRepository object is registered in the contructor of AppService, such as shown in the following snippet code:

public sealed class MyInventoryAppService : ApplicationServiceBase
{
    public MyInventoryAppService(IApplicationContext context)
        : base(context)
    {
        Container.Current.Register<IItemRepository, ItemRepository>().WithLifetimeManager(new ContainerLifetime());
        ...
    }
}

ItemListViewModel.cs and AppService.cs (MyInventory.Core) implements the same technique and can be used as reference. Hope this help.