TreeViewBuilder.OnItemExpanded(String) Method

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

Namespace : DevExtreme.AspNet.Mvc.Builders

Assembly : DevExtreme.AspNet.Core.dll

Declaration

csharp

public TreeViewBuilder OnItemExpanded(
    string jsFunc
)

Parameters

Name	Type	Description
jsFunc	String

An inline or external JavaScript function.

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 itemExpanded event. This handler can be an inline function or an external function’s reference. Function arguments are described in the client API reference.

Razor C#

cshtml

@(Html.DevExtreme().TreeView()
    .OnItemExpanded("myTreeView_onItemExpanded")
)

<script>
    function myTreeView_onItemExpanded(e) {
        // Handler code
    }
</script>

Refer to Handle Events and Define Callbacks for more information.