C# 创建Excel气泡图

气泡图（Bubble Chart）是可用于展示三个变量之间的关系。通过绘制x 值， y 值和大小值即可确定图表中气泡的坐标及大小。下面通过后端C#代码及VB.NET代码展示如何来实现在Excel中创建气泡图的方法。

程序环境：

• Visual Studio
• .Net FrameWork 4.5.1
• Spire.XLS for .NET Version 10.12.0

注：编辑代码前先将Spire.Xls.dll（dll文件可在解压包Bin文件夹下获取）添加引用至VS程序，可通过官网下载或者Nuget下载。参考如下引用效果：

【C#】

using Spire.Xls;
using Spire.Xls.Charts;
using System.Drawing;

namespace CreateBubbleChart_XLS
{
    class Program
    {
        static void Main(string[] args)
        {
            //创建一个Excel工作簿，并获取第一张工作表
            Workbook wb = new Workbook();
            wb.Version = ExcelVersion.Version2013;
            Worksheet sheet = wb.Worksheets[0];          

            //添加图表，指定图表类型
            Chart chart = sheet.Charts.Add();
            chart.ChartType = ExcelChartType.Bubble;
            chart.PrimaryCategoryAxis.Title = "人均消费";
            chart.PrimaryValueAxis.Title = "点评数";

            //设置图表的名称和数据
            Spire.Xls.Charts.ChartSerie cs1 = chart.Series.Add("气泡图");
            cs1.EnteredDirectlyValues = new object[]{2, 5, 3, 6, 7};
            cs1.EnteredDirectlyCategoryLabels = new object[]{1, 4.5, 1.2, 3.3, 2};
            cs1.EnteredDirectlyBubbles = new object[]{3, 6, 1, 4, 7};           

            //设置图表位置
            chart.LeftColumn = 4;
            chart.TopRow = 2;
            chart.RightColumn = 12;
            chart.BottomRow = 22;

            //设置图表标题
            chart.ChartTitle = "人均消费VS点评数";
            chart.ChartTitleArea.IsBold = true;
            chart.ChartTitleArea.Size = 12;    
            chart.Legend.Position = LegendPositionType.Top;

            //保存文档
            wb.SaveToFile("BubbleChart.xlsx", ExcelVersion.Version2013);
            System.Diagnostics.Process.Start("BubbleChart.xlsx");
        }
    }
}

气泡图效果：

【vb.net】

Imports Spire.Xls
Imports Spire.Xls.Charts
Imports System.Drawing

Namespace CreateBubbleChart_XLS
    Class Program
        Private Shared Sub Main(args As String())
            '创建一个Excel工作簿，并获取第一张工作表
            Dim wb As New Workbook()
            wb.Version = ExcelVersion.Version2013
            Dim sheet As Worksheet = wb.Worksheets(0)

            '添加图表，指定图表类型
            Dim chart As Chart = sheet.Charts.Add()
            chart.ChartType = ExcelChartType.Bubble
            chart.PrimaryCategoryAxis.Title = "人均消费"
            chart.PrimaryValueAxis.Title = "点评数"

            '设置图表的名称和数据
            Dim cs1 As Spire.Xls.Charts.ChartSerie = chart.Series.Add("气泡图")
            cs1.EnteredDirectlyValues = New Object() {2, 5, 3, 6, 7}
            cs1.EnteredDirectlyCategoryLabels = New Object() {1, 4.5, 1.2, 3.3, 2}
            cs1.EnteredDirectlyBubbles = New Object() {3, 6, 1, 4, 7}

            '设置图表位置
            chart.LeftColumn = 4
            chart.TopRow = 2
            chart.RightColumn = 12
            chart.BottomRow = 22

            '设置图表标题
            chart.ChartTitle = "人均消费VS点评数"
            chart.ChartTitleArea.IsBold = True
            chart.ChartTitleArea.Size = 12
            chart.Legend.Position = LegendPositionType.Top

            '保存文档
            wb.SaveToFile("BubbleChart.xlsx", ExcelVersion.Version2010)
            System.Diagnostics.Process.Start("BubbleChart.xlsx")
        End Sub
    End Class
End Namespace