Context Menu Question

[wlo413]

 Is it possible to remove some of the items in the context menu that shows up when a user right mouse clicks on a chart?

I am using 

chart1.ContextMenu.MenuItems.RemoveAt(1);

however, this keeps throwing a NullReferenceException.

 

Likewise, is it possible to add an item, previously removed, back into the context menu? What I want to do is, hide the Data Grid item until a certain condition is met. Once this condition is satisfied, show the Data Grid item.

I want to do the same thing to the Data Grid item on the toolbar as well.

[CarlosAC]

Hi wlo413.  Even though  the

command will always be present in the chart , you

can  hide the item to the end user. Following code show how to remove Pie Gallery item from Gallery Types

Menu.

 

Int32 index = chart1.Commands[CommandId.Gallery].SubCommands.IndexOf((Int32)CommandId.Pie);

chart1.Commands[CommandId.Gallery].SubCommands.RemoveAt(index);

 

If you want to add it

again, you should use following code:

 

chart1.Commands[CommandId.Gallery].SubCommands.Add(CommandId.Pie);

[wlo413]

 Ok, that example makes sense. However, which attribute of CommandID refers to the context menu?Also, when I apply the example to remove the Data Grid item from the tool bar in my code snippet: Int32 index = chart1.Commands[CommandId.ToolBar].SubCommands.IndexOf((Int32)CommandId.DataGrid);chart1.Commands[CommandId.ToolBar].SubCommands.RemoveAt(index);I get an ArgumentOutOfRangeException because the index is always returning -1. I can remove the DataGrid item from the toolbar by manually figuring out its index and using this:chart1.ToolBar.RemoveAt(14);But I can't seem to add the DataGrid item back becausechart1.Commands[CommandId.ToolBar].SubCommands.Add(CommandId.DataGrid);doesn't appear to be doing anything.

[CarlosAC]

Hi wlo413.  If you want to get the Main Context Menu,

please use following code:

 

Command

myCommand = chart1.Commands[CommandId.ContextMenuBack];

 

Now, regarding to DataGrid, you are confused about Toolbar

Command and Chart

[wlo413]

 Hello Carlos

Thanks for the help, that was exactly what I needed. However to correct a typo in your code example to remove the Data Grid from the main context menu.

Int32
index = chart1.Commands[CommandId.
ContextMenuBack].SubCommands.IndexOf((Int32)CommandId.DataGrid);

chart1.Commands[CommandId.Gallery].SubCommands.RemoveAt(index);

 

CommandID.Gallery should be replaced with CommandID.ContextMenuBack

I knew exactly what you meant though