How to add a list of UIelement in Windows Phone - windows-phone

Question

I want to create a page with dynamic control in windows phone.
While doing this I also want to show a progress bar
Below is my code
protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
base.OnNavigatedTo(e);
progressstackPanel.Visibility = Visibility.Visible;//progress bar
formScreen = this;
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
if (!isfst)
{
DrawScreen();
}
else
{
//xTitlePanel is only stack panel in my xaml with vertical orientation
xTitlePanel.UpdateLayout();
}
isfst = true;
progressstackPanel.Visibility = Visibility.Collapsed;
});
}
//Code of DrawScreen which is adding control to my stack panels
private void DrawScreen()
{
if (frm_getset.ChildList != null)
{
String[] arr = frm_getset.ChildList.Split(',');
xTitlePanel.Children.Clear();
PrepareControls prepcontrol = new PrepareControls();
foreach (AttributeGetSet a in _Attribute)
{
//this will return a stackpanel containing
// button/textbox etc.depending on a
StackPanel sp = prepcontrol.getControl(i, a.Label, a, formScreen);
try
{
xTitlePanel.Children.Add(sp);
///Here I get a eception only one control is added first one
/// for anyone it is getting a exception Argument
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
i += 1;
}
The system is adding only one control and when ever it try to execute xTitlePanel.Children.Add(sp); it will get an exception.

Answer 1

I solved the problem ,"xTitlePanel" is a StackPanel I created in my XAML. I found you can not add more that one element from Dispatcher to a control crated on xaml. Like that. so I have to create local stack and add controls to the that local stack panel then and after complete I add the local stack panel to xTitlePanel. NOW my code looks like below
filteredList = new List<FormGetSet>();
if (frm_getset.ChildList != null)
{
String[] arr = frm_getset.ChildList.Split(',');
foreach (String x in arr)
{
filteredList.Add(_template.list_fromgetset.Where(p => p.FormID.Contains(x.Trim())).ToList()[0]);
}
}
xTbox_FormNameHeader.Text = frm_getset.NAME;
_Attribute = new List<AttributeGetSet>();
_Attribute = frm_getset.list_attributegetset;
xTitlePanel.Children.Clear();
StackPanel spPanel = new StackPanel();
spPanel.Orientation = System.Windows.Controls.Orientation.Vertical;
spPanel.Background = new SolidColorBrush(Colors.Transparent);
//xTitlePanel.Children.Add(PrepareControls.getControl(1, "LABEL", "16"));
int i = 1;
// List<AttributeGetSet> _Attribute2 = new List<AttributeGetSet>();
foreach (AttributeGetSet a in _Attribute)
{
PrepareControls prepcontrol = new PrepareControls();
StackPanel sp= prepcontrol.getControl(i, a.Label, a, this);
try
{
spPanel.Children.Add(sp);
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
//xTitlePanel.Background = new SolidColorBrush(Colors.White);
//_Attribute2.Add(a);
i += 1;
}
xTitlePanel.Children.Add(spPanel);