Binding to a object with checked state being updated.

[Leonard]

I have the following class and not sure how to return the checked state when data binding to Treeview control is being done. Any suggestions would greatly be appreciated.

 

Leonard

 

public class districts : INotifyPropertyChanged 
 {
       public event PropertyChangedEventHandler PropertyChanged;   
       #region Public Constructors     
       /// <summary>
       /// Treeview class data definition
       /// </summary>
       /// <param name="districtId"></param>
       /// <param name="parentDistrictId"></param>
       /// <param name="description"></param>
       /// <param name="childrenDistricts"></param>
       public districts(string districtId, string parentDistrictId, string description, List<districts> childrenDistricts)
 {
  this.DistrictId = districtId;
  this.ParentDistrictId = parentDistrictId;
  this.Description = description;
  this.ChildrenDistricts = childrenDistricts;
 }
 #endregion Public Constructors
 
 #region Public Properties
 
 public List<districts> ChildrenDistricts { get; set; }
 public string Description { get; set; }
 public string DistrictId { get; set; }
 public string ParentDistrictId { get; set; }
 public bool Checked { get; set; }      
 #endregion Public Properties   
}

[Dess | Tech Support Engineer, Principal]

Hello Leonard,

Thank you for writing. 

Please refer to the following help articles demonstrating how to bind the checkboxes in RadTreeView by specifying the CheckedMember property:
- self-reference data: http://docs.telerik.com/devtools/winforms/treeview/data-binding/binding-to-self-referencing-data
- object-relational data: http://docs.telerik.com/devtools/winforms/treeview/data-binding/binding-to-object-relational-data

The provided Districts class contains the ParentDistrictId property which is relevant for the self-referencing data as well as the ChildrenDistricts collection associated with the object-relational data. Feel free to use one of the above-mentioned approaches for the hierarchy setup according to the exact data that you have: either all records are available in the main list and the ParentDistrictId determines which is the parent node or don't use the ParentDistrictId property, but the ChildrenDistricts collection specifying the child nodes.

I hope this information helps. Should you have further questions I would be glad to help.

Regards,
Dess
Telerik by Progress

[Leonard]

I have the binding working for checked state using the checked member my next question is that it changed the way the tree view control displays the top nodes checked even when only one of the sub nodes is checked. I have the checkboxes set up for tristate and in the binding using the CheckedMember I do not get the indeterminate value showing in the top node but in the sub node 000 it is indeterminate. I have added two pictures show when I do  and do not use CheckedMember for display purposes. Is there another property that should be set or is that the way the control should work

 

Leonard

[Hristo]

Hi Leonard,

Thank you for writing back.

The reason for the described behavior is an issue in RadTreeView: ADD. RadTreeView - binding the check-boxes to support TriStateMode. The feedback item also provides a workaround solution. Basically, you need to sync the state manually.

I hope this helps. Should you have further questions please do not hesitate to write back.

Regards,
Hristo Merdjanov
Telerik by Progress