DevExpress DXCharts应用教程六：2D重叠范围条形图

本文演示如何用 DevExpress WPF控件的 DXCharts 创建2D重叠范围条形图。首先将 ChartControl.Diagram 属性部署到XYDiagram2D下，然后添加两个RangeBarOverlappedSeries2D对象到图像的 Diagram.Series集合。下面的示例同时显示了如何添加图表标题，如何隐藏标记和标签以改进图表外观。

请参考下面示例：

<Window x:Class="_2DOverlappedRangeBarChart.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/charts"
        Title="MainWindow" Height="480" Width="640" >
    <Grid>
        <dxc:ChartControl Name="chartControl1">
            <dxc:ChartControl.Diagram>
                <dxc:XYDiagram2D>
                    <dxc:XYDiagram2D.Series>
                        <dxc:RangeBarOverlappedSeries2D ArgumentScaleType="DateTime" 
                                                        MaxMarkerVisible="False" MinMarkerVisible="False">
                            <dxc:RangeBarOverlappedSeries2D.Points>
                                <dxc:SeriesPoint Argument="01/01/2010" Value="73.39" dxc:RangeBarSeries2D.Value2="84.68"/>
                                <dxc:SeriesPoint Argument="02/01/2010" Value="71.19" dxc:RangeBarSeries2D.Value2="80.16"/>
                                <dxc:SeriesPoint Argument="03/01/2010" Value="77.1" dxc:RangeBarSeries2D.Value2="81.18"/>
                                <dxc:SeriesPoint Argument="04/01/2010" Value="78.2" dxc:RangeBarSeries2D.Value2="83.59"/>
                                <dxc:SeriesPoint Argument="05/01/2010" Value="64.91" dxc:RangeBarSeries2D.Value2="85.14"/>
                                <dxc:SeriesPoint Argument="06/01/2010" Value="70.94" dxc:RangeBarSeries2D.Value2="78.86"/>
                                <dxc:SeriesPoint Argument="07/01/2010" Value="72.33" dxc:RangeBarSeries2D.Value2="79.53"/>
                                <dxc:SeriesPoint Argument="08/01/2010" Value="70.2" dxc:RangeBarSeries2D.Value2="81.7"/>
                                <dxc:SeriesPoint Argument="09/01/2010" Value="72.51" dxc:RangeBarSeries2D.Value2="80.22"/>
                                <dxc:SeriesPoint Argument="10/01/2010" Value="79.74" dxc:RangeBarSeries2D.Value2="83.48"/>
                            </dxc:RangeBarOverlappedSeries2D.Points>
                            <dxc:RangeBarOverlappedSeries2D.Label>
                                <dxc:SeriesLabel Visible="False" />
                            </dxc:RangeBarOverlappedSeries2D.Label>
                        </dxc:RangeBarOverlappedSeries2D>
                        <dxc:RangeBarOverlappedSeries2D  ArgumentScaleType="DateTime" BarWidth="0.2"
                                                         MaxMarkerVisible="False" MinMarkerVisible="False">
                            <dxc:RangeBarOverlappedSeries2D.Points>
                                <dxc:SeriesPoint Argument="01/01/2010" Value="72.89" dxc:RangeBarSeries2D.Value2="83.18"/>
                                <dxc:SeriesPoint Argument="02/01/2010" Value="71.19" dxc:RangeBarSeries2D.Value2="80.16"/>
                                <dxc:SeriesPoint Argument="03/01/2010" Value="78.7" dxc:RangeBarSeries2D.Value2="83.76"/>
                                <dxc:SeriesPoint Argument="04/01/2010" Value="81.45" dxc:RangeBarSeries2D.Value2="86.84"/>
                                <dxc:SeriesPoint Argument="05/01/2010" Value="65.96" dxc:RangeBarSeries2D.Value2="86.19"/>
                                <dxc:SeriesPoint Argument="06/01/2010" Value="71.44" dxc:RangeBarSeries2D.Value2="79.79"/>
                                <dxc:SeriesPoint Argument="07/01/2010" Value="71.98" dxc:RangeBarSeries2D.Value2="79.03"/>
                                <dxc:SeriesPoint Argument="08/01/2010" Value="71.2" dxc:RangeBarSeries2D.Value2="82.55"/>
                                <dxc:SeriesPoint Argument="09/01/2010" Value="72.41" dxc:RangeBarSeries2D.Value2="79.97"/>
                                <dxc:SeriesPoint Argument="10/01/2010" Value="79.49" dxc:RangeBarSeries2D.Value2="83.23"/>
                            </dxc:RangeBarOverlappedSeries2D.Points>
                            <dxc:RangeBarOverlappedSeries2D.Label>
                                <dxc:SeriesLabel Visible="False"/>
                            </dxc:RangeBarOverlappedSeries2D.Label>
                        </dxc:RangeBarOverlappedSeries2D>
                    </dxc:XYDiagram2D.Series>
                    <dxc:XYDiagram2D.AxisX>
                        <dxc:AxisX2D GridLinesVisible="True" DateTimeGridAlignment="Month">
                            <dxc:AxisX2D.DateTimeOptions>
                                <dxc:DateTimeOptions Format="Custom" FormatString="MMMM" />
                            </dxc:AxisX2D.DateTimeOptions>
                        </dxc:AxisX2D>
                    </dxc:XYDiagram2D.AxisX>
                    <dxc:XYDiagram2D.AxisY>
                        <dxc:AxisY2D>
                            <dxc:AxisY2D.Title>
                                <dxc:AxisTitle Content="$ per barrel" />
                            </dxc:AxisY2D.Title>
                            <dxc:AxisY2D.Range>
                                <dxc:AxisRange dxc:AxisY2D.AlwaysShowZeroLevel="False" />
                            </dxc:AxisY2D.Range>
                        </dxc:AxisY2D>
                    </dxc:XYDiagram2D.AxisY>
                </dxc:XYDiagram2D>
            </dxc:ChartControl.Diagram>
            <dxc:ChartControl.Titles>
                <dxc:Title Dock="Top" HorizontalAlignment="Center">Crude Oil Prices in 2010</dxc:Title>
            </dxc:ChartControl.Titles>
        </dxc:ChartControl>
    </Grid>
</Window>