TreeListRowDraggingBuilder.OnDragStart(RazorBlock) Method

A function that is called when a drag gesture is initialized. Mirrors the client-side onDragStart option.

Namespace: DevExtreme.AspNet.Mvc.Builders

Assembly: DevExtreme.AspNet.Core.dll

Declaration

public TreeListRowDraggingBuilder OnDragStart(
    RazorBlock jsFunc
)

Parameters

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

Returns

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

Remarks

Use this method to specify a JavaScript handler for the client-side dragStart 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().TreeList()
    .RowDragging(dragging => dragging
        .OnDragStart(@<text>
            function(e) {
                // Handler code
            }
        </text>)
    )
)

Refer to Handle Events and Define Callbacks for more information.