Treeview HierarchicalDataTemplate Howto - WCF Ria Services LoadOperation - treeview

Question

Db class propertys
[Serializable]
[EnableClientAccess()]
public class DbPersonelJobDetail
{
public DbPersonelJobDetail()
{
}
[Key]
public Guid PersonelID { get; set; }
public Guid JobID { get; set; }
public string JobName { get; set; }
public string Adi { get; set; }
}
DomainServices Linq Query
public IQueryable<DTO.DbPersonelJobDetail> GetPersonelJobTreeList()
{
IQueryable<DTO.DbPersonelJobDetail> result = from p in ObjectContext.SPA_PersonelJobDetail
join c in ObjectContext.SPA_PersonelJob on p.PersonelJobID equals c.ID
select new DTO.DbPersonelJobDetail()
{
JobID=p.PersonelJobID,
JobName = c.JobName,
PersonelID=p.ID,
Adi=p.Adi
};
return result.AsQueryable();
}
BindTreeList methot
public void BindTreeList()
{
loadOP = context.Load(context.GetPersonelJobTreeListQuery(), false);
loadOP.Completed += loadOP_Completed;
}
void loadOP_Completed(object sender, EventArgs e)
{
treeListPersonel.ItemsSource = loadOP.Entities;
}
I'm Treeview of binding BindTreeList() methot.
The following, as in the picture. HierarchicalDataTemplate Itemsource binding howto?
Could you make an example?
I could not :(
Waiting for your ideas...
Pucture

Answer 1

Load first lavel nodes.
In HierarchicalDataTemplate bind ItemsSource to LoadChildsConverter
<riaControls:DomainDataSource x:Name="MyData" QueryName="GetFirstLavel"
AutoLoad="True" LoadSize="50">
<riaControls:DomainDataSource.DomainContext>
<web:AdvDomainContext />
</riaControls:DomainDataSource.DomainContext>
</riaControls:DomainDataSource>
<sdk:TreeView ItemsSource="{Binding}" DataContext="{Binding ElementName=MyData, Path=Data}">
<sdk:TreeView.ItemTemplate>
<sdk:HierarchicalDataTemplate
ItemsSource="{Binding Converter={StaticResource TreeViewCollectionConverter}}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding CODE}" />
<TextBlock Text="{Binding DESC}" />
</StackPanel>
</sdk:HierarchicalDataTemplate>
</sdk:TreeView.ItemTemplate>
</sdk:TreeView>
TreeViewCollectionConverter.cs
public class TreeViewR5OBJECTCollectionConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
ObservableCollection<Node> nodeList = new ObservableCollection<Node>();
if (value != null)
{
AdvDomainContext ctx = new AdvDomainContext();
Node parentNode = (Node)value;
ctx.Load(ctx.GetChildsQuery(parentNode), iop =>
{
foreach (var o in iop.Entities)
nodeList.Add(o);
}, null);
}
return nodeList;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return null;
}
}
In AdvDomainService.cs
must have
public IQueryable<Node> GetFirstLavel()
to return first level nodes
and
public IQueryable<Node> GetChilds(Node ParentNode)
to return childs of ParentNode