Crosshairs

The Crosshair functionality of RadHtmlChart can be used as of Q3 2020.

The RadHtmlChart crosshairs are lines, which are perpendicular to the axes and enable the user to see the exact value at the current cursor position.

You can customize the look of the crosshair through the chosen axis CrosshairAppearance tag, and style its tooltips through its nested TooltipsAppearance.

  • DefaultVB.aspx
  • DefaultVB.aspx.vb
<%@ Page Title="" Language="VB"  AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="Telerik.Web.Examples.HtmlChart.Crosshair.DefaultVB" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

<!DOCTYPE html>
<html xmlns='http://www.w3.org/1999/xhtml'>
<head runat="server">
    <title>Telerik ASP.NET Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <telerik:RadScriptManager runat="server" ID="RadScriptManager1" />
    <telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" />
    <div class="demo-container size-narrow">
        <telerik:RadHtmlChart runat="server" ID="ChartWithColumnsAndLineSeries" Width="500px" Height="400px">
            <ChartTitle Text="Chart with Crosshairs">
            </ChartTitle>
            <PlotArea>
                <Series>
                    <telerik:ColumnSeries>
                        <SeriesItems>
                            <telerik:CategorySeriesItem Y="34" />
                            <telerik:CategorySeriesItem Y="76" />
                            <telerik:CategorySeriesItem Y="20" />
                            <telerik:CategorySeriesItem Y="15" />
                            <telerik:CategorySeriesItem Y="84" />
                        </SeriesItems>
                        <TooltipsAppearance Color="White" />
                    </telerik:ColumnSeries>
                    <telerik:LineSeries>
                        <SeriesItems>
                            <telerik:CategorySeriesItem Y="76" />
                            <telerik:CategorySeriesItem Y="12" />
                            <telerik:CategorySeriesItem Y="28" />
                            <telerik:CategorySeriesItem Y="92" />
                            <telerik:CategorySeriesItem Y="54" />
                        </SeriesItems>
                        <TooltipsAppearance Color="White" />
                    </telerik:LineSeries>
                </Series>
                <XAxis>
                    <CrosshairAppearance Color="#0000ff" DashType="Solid" Opacity="0.5" Visible="true" Width="2">
                        <TooltipsAppearance BackgroundColor="#0066ff" Color="#ffffff" Visible="true" DataFormatString="XAxis value is {0}">
                            <BorderAppearance Width="1" Color="#0000ff" />
                        </TooltipsAppearance>
                    </CrosshairAppearance>
                    <Items>
                        <telerik:AxisItem LabelText="2016" />
                        <telerik:AxisItem LabelText="2017" />
                        <telerik:AxisItem LabelText="2018" />
                        <telerik:AxisItem LabelText="2019" />
                        <telerik:AxisItem LabelText="2020" />
                    </Items>
                </XAxis>
                <YAxis>
                    <CrosshairAppearance Color="Red" DashType="Dot" Opacity="1" Visible="true" Width="3">
                        <TooltipsAppearance BackgroundColor="#ff6666" Color="#ffffff" Visible="true" DataFormatString="YAxis value is {0}">
                            <BorderAppearance Width="1" Color="#ff0000" />
                        </TooltipsAppearance>
                    </CrosshairAppearance>
                </YAxis>
            </PlotArea>
            <Legend>
                <Appearance Visible="false" />
            </Legend>
        </telerik:RadHtmlChart>
    </div>
    </form>
</body>
</html>

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