private async Task <bool> LoadTree()
{
List <ArmtesElement> items = null;
await Task.Factory.StartNew(() =>
{
byte attempts = 1;
items = null;
while (items == null && attempts <= 3)
{
if (armtes.LastException != null)
{
if ((armtes.LastException as WebException) == null)
{
break;
}
}
if (progressController != null)
{
if (progressController.IsCanceled)
{
break;
}
}
if (progressController != null)
{
this.Dispatcher.Invoke(new Action(() =>
{
if (progressController.IsOpen)
{
progressController.SetMessage(String.Format("{0}\r\n{1}-я попытка ...", "Загрузка списка объектов", attempts));
}
}));
}
items = armtes.GetElements("e0");
attempts++;
}
});
if (items == null || items.Count == 0)
{
string errorDescription = this.GetNetErrorDescription(armtes.LastException);
await this.ShowErrorMessageAsync(String.Format("Список объектов не получен!{0}Описание ошибки: {1}", Environment.NewLine, errorDescription));
return(false);
}
ArmtesElement root = items.FirstOrDefault <ArmtesElement>();
ExecuteExpandingCommand(root);
//TODO: А надо ли?
items = new List <ArmtesElement>();
items.Add(root);
this.tree.ItemsSource = items;
return(true);
}
private void GetTreeElement(ArmtesElement parent)
{
string loading = "Loading...";
if (parent.Items.Count == 1 &&
parent.Items[0].Label == loading)
{
List <ArmtesElement> items = null;
this.Dispatcher.Invoke(new Action(() => tree.Cursor = Cursors.Wait));
items = armtes.GetElements(parent.Value);
if (items == null)
{
string errorDescription = this.GetNetErrorDescription(armtes.LastException);
this.ShowErrorMessage(errorDescription);
}
else
{
parent.Items.Clear();
parent.Items.AddRange(items);
// установка родителя
foreach (var item in items)
{
item.Parent = parent;
}
}
}
else
{
//System.Diagnostics.Debugger.Break();
}
this.Dispatcher.Invoke(new Action(() =>
{
tree.Cursor = Cursors.Arrow;
}));
}
private void ExecuteExpandingCommand(object obj)
{
if (null == obj)
{
return;
}
RoutedEventArgs args = obj as System.Windows.RoutedEventArgs;
ArmtesElement element = null;
System.Windows.Controls.TreeViewItem tvi = null;
if (null == args)
{
if (obj is System.Windows.Controls.TreeViewItem)
{
tvi = obj as System.Windows.Controls.TreeViewItem;
if (tvi.Header is ArmtesElement)
{
element = tvi.Header as ArmtesElement;
}
}
else
{
element = obj as ArmtesElement;
}
if (null == element)
{
return;
}
else
{
if (null == element.Items)
{
return;
}
SetAppStatus("Загрузка данных подразделения...");
GetTreeElement(element);
SetAppStatus();
}
}
else
{
if (null == args.Source)
{
return;
}
System.Windows.Controls.TreeViewItem treeViewItem = args.Source as System.Windows.Controls.TreeViewItem;
if (null == treeViewItem)
{
return;
}
if (null == treeViewItem.Header)
{
return;
}
element = treeViewItem.Header as ArmtesElement;
if (null == element)
{
return;
}
if (null == element.Items)
{
return;
}
if (element.Items.Count > 1)
{
return;
}
args.Handled = true;
SetAppStatus("Загрузка данных подразделения...");
GetTreeElement(element);
SetAppStatus();
}
}
