Rank 1
In LoadOnDemandTimer_Tick handler, I want to bind data source object from WCF.
When i add static object it works, but add from WCF node expanding icon is spinning continuously.
private void LoadOnDemandTimer_Tick(object sender, EventArgs e)
{
Department dpt = this.currentTreeViewItem.Item as Department;
Department sub = new Department();
sub.DepartmentName = "sub";
sub.Departmentid = "code";
dpt.Children.Add(sub); //<-- it works fine
TreeViewORGDataSource relSubSource = new TreeViewORGDataSource();
relSubSource.FillByCompayCode(dpt.CompanyCode);
if (relSubSource.Count > 0)
{
foreach (Department item in relSubSource[0].Children)
{
dpt.Children.Add(item);
}
}
this.currentTreeViewItem.IsExpanded = true;
(sender as DispatcherTimer).Stop();
}
FillByCompayCode method is WCF binding method.
I guess the reason is FillByCompayCode method is asyncronous.
How can i it works?
4 Answers, 1 is accepted
Check-out this example for a solution about how to use the Load On Demand functionality with services:
http://blogs.telerik.com/ValeriHristov/Posts/08-10-08/Silverlight_TreeView_Load_on_Demand.aspx?ReturnURL=%2fValeriHristov%2fPosts.aspx
About your problem - yes most probably the reason is that the data is not available when you try to add it. Just make sure that your data source is populating with the WCF service and all should be set.
Best wishes,
Valentin.Stoychev
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.
Rank 1
In this case, When the data source was changed it worked fine, but data source was empty, it didn't make any differences.
In my thought, the reason is that data source's change notify event not fired.
Is there any way that notify to TreeView that data loading is complete anyway?
Can I handle this?
Rank 1
In this case, When the data source was changed it worked fine, but data source was empty, it didn't make any differences.
In my thought, the reason is that data source's change notify event not fired.
Is there any way that notify to TreeView that data loading is complete anyway?
Can I handle this?
To stop the loading animation you can set the IsLoadingOnDemand property to false to the RadTreeViewItem. this will stop the animation.
If you want to remove the expander icon from the Item, just set the IsLoadOnDemandEnabled to false and this will do it.
Let us know if you have any other difficulties.
Greetings,
Valentin.Stoychev
the Telerik team
Check out Telerik Trainer, the state of the art learning tool for Telerik products.