TreeViewBuilder.OnItemCollapsed(RazorBlock) Method

A function that is executed when a tree view item is collapsed. Mirrors the client-side onItemCollapsed option.

Namespace: DevExtreme.AspNet.Mvc.Builders

Assembly: DevExtreme.AspNet.Core.dll

Declaration

public TreeViewBuilder OnItemCollapsed(
    RazorBlock jsFunc
)

Parameters

Name	Type	Description
jsFunc	RazorBlock	The Razor @<text> block that contains JavaScript function code.

Returns

Type	Description
TreeViewBuilder	A reference to this instance after the method is called.

Remarks

Use this method to specify a JavaScript handler for the client-side itemCollapsed 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#

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

Refer to Handle Events and Define Callbacks for more information.