TreeListBuilder<T>.OnContextMenuPreparing(RazorBlock) Method

A function that is executed before the context menu is rendered. Mirrors the client-side onContextMenuPreparing option.

Namespace : DevExtreme.AspNet.Mvc.Builders

Assembly : DevExtreme.AspNet.Core.dll

Declaration

csharp

public TreeListBuilder<T> OnContextMenuPreparing(
    RazorBlock jsFunc
)

Parameters

Name	Type	Description
jsFunc	RazorBlock

The Razor @<text> block that contains JavaScript function code.

Returns

Type	Description
TreeListBuilder<T>

A reference to this instance after the method is called.

Remarks

Use this method to specify a JavaScript handler for the client-side contextMenuPreparing event. Pass the Razor @<text> block that contains the function code to the method. Function arguments are described in the client API reference.

Razor C#

cshtml

@(Html.DevExtreme().TreeList()
    .OnContextMenuPreparing(@<text>
        function(e) {
            // Handler code
        }
    </text>)
)

Refer to Handle Events and Define Callbacks for more information.