private void LoadData()
{
string id = (Category.SelectedValue != string.Empty ? Category.SelectedValue : "23");
Document document = new Document(Convert.ToInt32(UmbracoCustom.GetParameterValue(UmbracoType.GymnastNode)));
Property property = document.getProperty("exercise");
var exercises = UmbracoCustom.GetDataTypeGrid(property).Where(g => g.category == id);
Exercise.Items.Clear();
foreach (var exercise in exercises)
{
Exercise.Items.Add(new ListItem(exercise.exercise, exercise.id));
}
}