ApplicationMenu2010.DropDown() Get NullReferenceException

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z posted over 13 years ago

when the code run to " ultraToolbarsManager1.Ribbon.ApplicationMenu2010.DropDown(); "

get the NullReferenceException ,the details are:

System.NullReferenceException was unhandled by user code
Message=Object reference not set to an instance of an object.
Source=Infragistics2.Win.UltraWinToolbars.v10.3
StackTrace:
       at Infragistics.Win.UltraWinToolbars.BackStageMenuAgent.GetElementRectRelativeToContainer(UIElement element, Control container)
       at Infragistics.Win.UltraWinToolbars.BackStageMenuAgent.CalculateRequiredDropDownSize(Size& minSize, Size& preferredMinSize, Size& preferredSize, Size& maxSize)
       at Infragistics.Win.UltraWinToolbars.BackStageMenuAgent.GetPopupControl()
       at Infragistics.Win.UltraWinToolbars.BackStageMenuAgent.DropDown(Rectangle fileMenuButtonRect, Boolean resetActiveContentTool)
       at Infragistics.Win.UltraWinToolbars.BackStageMenuAgent.DropDown(Rectangle fileMenuButtonRect)
       at Infragistics.Win.UltraWinToolbars.ApplicationMenuAgentBase.DropDown()
       at Infragistics.Win.UltraWinToolbars.ApplicationMenuBase.DropDown()
       at WindowsFormsApplication1.Form1.Form1_Load(Object sender, EventArgs e) in D:\My Documents\My Projects\WindowsFormsApplication1\WindowsFormsApplication1\Form1.cs:line 22
       at System.EventHandler.Invoke(Object sender, EventArgs e)
       at System.Windows.Forms.Form.OnLoad(EventArgs e)
       at System.Windows.Forms.Form.OnCreateControl()
       at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
       at System.Windows.Forms.Control.CreateControl()
       at System.Windows.Forms.Control.WmShowWindow(Message& m)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at System.Windows.Forms.Form.WmShowWindow(Message& m)
       at System.Windows.Forms.Form.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
InnerException:

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Offline [Infragistics] Boris Toromanov posted over 13 years ago

Hello zxfwinder,

I was not able to reproduce your scenario so I attached my sample in this post. Everything is working fine with the code I am using. Please review my application and feel free to let me know if there is something bothering you.

AppMenu2010DropDown.zip
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Offline Chris Waterman posted over 11 years ago in reply to [Infragistics] Boris Toromanov

I still encounter this problem and I can repro it in your sample application if I move the call:

ultraToolbarsManager1.Ribbon.ApplicationMenu2010.DropDown();

into the constructor or into a handler for the Form's "Load" event.

Is there an easy way to have the 2010 style application menu automatically drop down when the form is opened?
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Alexandru posted over 10 years ago in reply to Chris Waterman

Hello,

You can solve this problem in three ways

1. As indicated here, call DropDown() in the Form1_Paint event (and set a flag after the menu is opened in order to execute only once)

http://defdeveloper.blogspot.ro/2005_01_01_archive.html

2. Add a timer to the form, call DropDown() in the timer1_Tick event (and of course stop the timer in order to execute only once)

3. As indicated here, call DropDown() in the Form1_Shown event

http://es.infragistics.com/community/forums/t/8031.aspx
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Offline Chris Waterman posted over 11 years ago in reply to Chris Waterman

Forgot to mention that I'm using the 13.1.20131.2048 dlls.
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