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V25.1
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    SankeyDiagramControl.CustomizeLinkToolTip Event

    Occurs before a tooltip is displayed for a link and allows you to format tooltip content.

    Namespace: DevExpress.XtraCharts.Sankey

    Assembly: DevExpress.XtraCharts.v25.1.UI.dll

    NuGet Package: DevExpress.Win.Charts

    #Declaration

    public event CustomizeSankeyLinkToolTipEventHandler CustomizeLinkToolTip

    #Event Data

    The CustomizeLinkToolTip event's data class is CustomizeSankeyLinkToolTipEventArgs. The following properties provide information specific to this event:

    Property Description
    Content Specifies the tooltip’s content. Inherited from CustomizeSankeyToolTipEventArgs.
    Link Returns the link whose tooltip is customized.
    Title Specifies the tooltip’s title. Inherited from CustomizeSankeyToolTipEventArgs.

    #Remarks

    Handle the CustomizeNodeToolTip event to customize tooltips for nodes.

    #Example

    To format tooltip text for links, handle the CustomizeLinkToolTip event and specify the CustomizeSankeyToolTipEventArgs.Title and CustomizeSankeyToolTipEventArgs.Content properties.

    private void Form1_Load(object sender, EventArgs e) {
        sankeyDiagramControl1.ToolTipOptions.LinkToolTipEnabled = DevExpress.Utils.DefaultBoolean.True;
        sankeyDiagramControl1.ToolTipController = new DevExpress.Utils.ToolTipController { 
            ToolTipType = DevExpress.Utils.ToolTipType.Flyout, 
            AllowHtmlText = true 
        };
        sankeyDiagramControl1.CustomizeLinkToolTip += OnCustomizeLinkToolTip;
    }
    
    private void OnCustomizeLinkToolTip(object sender, CustomizeSankeyLinkToolTipEventArgs e) {
        e.Title = $"{e.Link.SourceNode.Tag}{e.Link.TargetNode.Tag}";
        e.Content = $"{e.Link.TotalWeight}";
    }
    
    See Also