Databinding for CheckState

[Jan]

I started with the example with the Leages and Division (as example for data binding from the Demo) and added a tristate checkbox to the treeview and a "bool?" in each class. Initially all items are set to "true".

public League(string name)
{
  _name = name;
  _divisions = new List<Division>();
  _selected = true;
}

string _name;
bool? _selected;

public string Name { get { return _name; } }
public bool? Selected { get { return _selected; } }

As described here I added the CheckStateConverter class which also handles the Indeterminate state.

public class CheckStateConverter : IValueConverter
{
  public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
  {
    bool? result = (bool?)value;
    ToggleState returnValue = ToggleState.Indeterminate;
    if (result == true)
      returnValue = ToggleState.On;
    else
    {
      if (result == false)
        returnValue = ToggleState.Off;
    }

    return returnValue;
  }
//....

The data binding works fine, but the thing I can't understand: If I expand "League A" and "Division A" and uncheck "Team I",  "League A" and "Division A" also switch to "unchecked" instead of "indeterminate". If I uncheck "League A" and check it again the whole tree behaves correctly. What is wrong in my example?

Thanks in advance!
Jan

[Tina Stancheva]

Hi Jan,

There are several things that may be causing the problem.

 However, the code snippets you provided are not sufficient to investigate the issue in detail.

 Can you please send us your project so that we can take a look?

Greetings,
Tina Stancheva
the Telerik team

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[Anil]

Hi

I am also getting the similar problem. I think there is some bug in the control. if there are 3 child nodes and 2 are checked and 1 is unchecked, then the parent node check box should be intermediate but it shows the value depending on the value of the property rather then values of the children. If all the 3 child nodes are checked then also the checkbox shows the value of the property rather than the considering child nodes value.
Please help me. Thanks for any help.

Anil.

[Anil]

Can someone help me in this.

[Valentin.Stoychev]

Hello Jan,

Can you open a support ticket and send us an example where the problem is reproducible.

Thanks!

Kind regards,
Valentin.Stoychev
the Telerik team

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[Rick Bednarik]

Hi,

The issue is fixed in new version of controls.

Rick.