async Task ExecuteLoadItemsCommand()
{
IsBusy = true;
try
{
Courses.Clear();
var items = await CourseDataStore.GetItemsAsync(true);
if (!string.IsNullOrWhiteSpace(SearchPararmeter))
{
items = items.Where(c => c.Name.ToLower().Contains(SearchPararmeter.ToLower()));
}
foreach (var item in items)
{
Courses.Add(item);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
finally
{
IsBusy = false;
}
}
public ItemsViewModel()
{
Title = "Browse";
Items = new ObservableCollection <CourseModel>();
LoadItemsCommand = new Command(async() => await ExecuteLoadItemsCommand());
MessagingCenter.Subscribe <CourseDetails, CourseModel>(this, "CourseSaved", async(obj, item) =>
{
var newItem = item as CourseModel;
Items.Add(newItem);
await CourseDataStore.AddItemAsync(newItem);
});
}
private async Task AddCourseAsync()
{
if (!ValidationHelper.IsFormValid(CourseModel, _page))
{
return;
}
if (string.IsNullOrWhiteSpace(CourseModel.Id))
{
await CourseDataStore.AddItemAsync(CourseModel);
}
else
{
await CourseDataStore.UpdateItemAsync(CourseModel);
}
}
async Task ExecuteLoadItemsCommand()
{
IsBusy = true;
try
{
Items.Clear();
var items = await CourseDataStore.GetItemsAsync(true);
foreach (var item in items)
{
Items.Add(item);
}
}
catch (Exception ex)
{
Debug.WriteLine(ex);
}
finally
{
IsBusy = false;
}
}
public CourseViewModel(CourseDataStore service)
{
_service = service;
CoursesTableTitle = Properties.Strings.CoursesTableTitle;
RatesTitle = Properties.Strings.RatesTitle;
}
