[Solved] Expand All / Collapse all for a hierarchical grid

[Krishna Kishor Bhat]

Hi,

I m facing an error while trying to implement expand all / collapse all functionality for the Hierarchical Grids. The code for expand all / collapse all that I have written is

this.RadGridView.ExpandAllHierarchyItems(); // for expand

this.RadGridView.CollapseAllHierarchyItems(); // for collapse

I m writing this in the Click event of the Rad Navigation Button.

The error that I m getting is
{System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.Windows.Controls.RadNavigationButton.RadNavigationButton_Click(Object sender, RoutedEventArgs e)
   at System.Windows.RoutedEventHandler.Invoke(Object sender, RoutedEventArgs e)
   at System.Windows.Controls.Primitives.ButtonBase.OnClick()
   at System.Windows.Controls.Button.OnClick()
   at System.Windows.Controls.Primitives.ButtonBase.OnMouseLeftButtonUp(MouseButtonEventArgs e)
   at System.Windows.Controls.Control.OnMouseLeftButtonUp(Control ctrl, EventArgs e)
   at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, String eventName)}

I m using the Q2 2009 SP1 Version 2009.2.812.1030

Thanks,
Krishna Bhat

[Vlad]

Hi Krishna,

Most probably this.RadGridView is null - can you check this?

Best wishes,
Vlad
the Telerik team

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[Krishna Kishor Bhat]

Hi Vlad,

Thanks for your reply. I have checked whether the RadGridView is null. It is not null.

Thanks,
Krishna Bhat

[Krishna Kishor Bhat]

Hi Vlad,

Can you please look into this issue on higher priority.

Thanks
Krishna Bhat

[Krishna Kishor Bhat]

Hi Vlad,

one more question, can you tell me which SP does the dll's version 2009.2.911.1030 belong to.
And if I want to get this version where do I download it from.

Thanks,
Krishna Bhat

[Ivan]

Hi Krishna Kishor Bhat,

The problem can be reproduced if expand/collapse an hierarchy item in the RadNavigationButton click event. 
Using a standard Button control in the described scenario is working fine - see the attached example.

Please take a look at it.

Sincerely yours,
Ivan
the Telerik team

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Watch a video on how to optimize your support resource searches and check out more tips on the blogs.

[Krishna Kishor Bhat]

Thanks Ivan for the solution.


Regards,
Krishna Bhat