private async void LoadData()
{
DepartmentCollection.Clear();
CategoryCollection.Clear();
var dCollection = await DbHandler.Instance.GetAllData <BbDepartment>();
DepartmentCollection.AddRange(dCollection);
var cCollection = await DbHandler.Instance.GetAllData <BbCategory>();
CategoryCollection.AddRange(cCollection);
}
public override async void OnLoad()
{
base.OnLoad();
List <BbDepartment> deptCollection = await DbHandler.Instance.GetAllData <BbDepartment>();
List <BbCategory> categoryCollection = await DbHandler.Instance.GetAllData <BbCategory>();
DeptCollection.Clear();
CategoryCollection.Clear();
DeptCollection.AddRange(deptCollection);
CategoryCollection.AddRange(categoryCollection);
}