RadListView with ContextMenu

[Yu Gene Loh]

Hi there,

I am trying to integrate a ContextMenu with a RadListView. However, unlike RadGrid, RadListView does not have the event OnRowContextMenu. The question is then, how do I know which item was the ContextMenu meant to work on?

Cheers,

Alvin

[Sebastian]

Hi Yu Gene Loh,

For your convenience I prepared a sample project which illustrates how to display context menu for RadListView items. Note that the example will be used as basis for a new demo under the Application Scenarios section of RadListView's online demos (which will go live with Q3 2009 SP1).

To associate the context menu with the listview instance, intercept the oncontextmenu client event of the listview items wrapper (fieldset in this case), get reference to the context menu object client-side and invoke its show method (passing the browser's event argument as parameter).You also need to save the index of the right-clicked listview item on the client, pass it at a later stage inside the OnClientItemClicked event of the context menu, determine the item chosen by the end user and use the methods from RadListView's client API to perform edit, init insert or delete operation.

Best regards,
Sebastian
the Telerik team

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[Yu Gene Loh]

Thanks Sebastian. Really appreciate your help on this although I have found my way to get it through over the last few days. I would still take a look of the sample project provided by you nevertheless. Once again, really appreciate your help.

Cheers!

[Steven Amani]

I am trying to get this code to work in the Q3 build of Telerki but cannot. I get a warning that oncontextmenu is not a supported event of the ListView. Help!

[Sebastian]

Hello Steven,

There should not be any difference in the exact Q3 version you are using. The example is already part of RadControls for ASP.NET AJAX online demos and you can view it here:

http://demos.telerik.com/aspnet-ajax/controls/examples/integration/listviewwithcontextmenu/defaultcs.aspx?product=listview

Greetings,
Sebastian
the Telerik team

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[Steven Amani]

I have this error when trying to get the ContextMenu to appear:

Compiler Error Message: BC30108: 'RadListViewDataItem' is a type andcannot be used as an expression. The offending code looks like:

 <fieldset style="float: left; width: 220px; height: 60px; border: 0px;" oncontextmenu="ShowContextMenu('<%# ((RadListViewDataItem)(Container)).DisplayIndex %>', event);" >

</code>

[Steven Amani]

Right I am an incher closer. The reason for the error is that its C# and I am using VB. I have changed it to:

oncontextmenu="ShowContextMenu(<%TryCast(Container, RadListViewDataItem).DisplayIndex%>, event);"

And I get an error that:

 BC30451: Name 'Container' is not declared.

[Steven Amani]

Solved with (CType(Container, RadListViewDataItem).DisplayIndex%>, event);