OWC 的应用 - 柱状图(VB.NET)
2006-09-17 21:58
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'创建ChartSpace对象来放置图表
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Dim myChart As ChartSpaceClass = New ChartSpaceClass
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'在ChartSpace对象中添加图表,Add方法返回chart对象
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Dim Chart1 As ChChart = myChart.Charts.Add(0)
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'指定图表的类型。类型由OWC.ChartChartTypeEnum枚举值得到
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Chart1.Type = OWC10.ChartChartTypeEnum.chChartTypeColumnClustered
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'指定图表是否需要图例
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Chart1.HasLegend = True
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Chart1.Legend.Position = ChartLegendPositionEnum.chLegendPositionTop
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'给定标题
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Chart1.HasTitle = True
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Chart1.Title.Caption = "1-6月数据分布图"
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'计算数据
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'X轴
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Dim strCategory As String = "1" + ControlChars.Tab + "2" + ControlChars.Tab _
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+ "3" + ControlChars.Tab + "4" + ControlChars.Tab + "5" + ControlChars.Tab _
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+ "6" + ControlChars.Tab
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'Y轴
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Dim strValue As String = "9" + ControlChars.Tab + "8" + ControlChars.Tab _
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+ "4" + ControlChars.Tab + "10" + ControlChars.Tab + "12" + ControlChars.Tab _
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+ "6" + ControlChars.Tab
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'Z轴
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Dim strValue2 As String = "0.3" + ControlChars.Tab + "0.63" + ControlChars.Tab _
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+ "0.48" + ControlChars.Tab + "0.86" + ControlChars.Tab + "0.95" + ControlChars.Tab _
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+ "0.18" + ControlChars.Tab
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'1. 添加一个series
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Dim Ser1 As ChSeries = Chart1.SeriesCollection.Add(0)
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'给定series的名字
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Ser1.SetData(ChartDimensionsEnum.chDimSeriesNames, _
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ChartSpecialDataSourcesEnum.chDataLiteral, "Product")
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'给定分类
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Ser1.SetData(ChartDimensionsEnum.chDimCategories, _
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ChartSpecialDataSourcesEnum.chDataLiteral, strCategory)
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'给定值
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Ser1.SetData(ChartDimensionsEnum.chDimValues, _
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ChartSpecialDataSourcesEnum.chDataLiteral, strValue)
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'2. 再添加一个series
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Dim Ser2 As ChSeries = Chart1.SeriesCollection.Add(1)
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'给定series的名字
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Ser2.SetData(ChartDimensionsEnum.chDimSeriesNames, _
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ChartSpecialDataSourcesEnum.chDataLiteral, "Ratio")
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'给定分类
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Ser2.SetData(ChartDimensionsEnum.chDimCategories, _
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ChartSpecialDataSourcesEnum.chDataLiteral, strCategory)
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'给定值
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Ser2.SetData(ChartDimensionsEnum.chDimValues, _
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ChartSpecialDataSourcesEnum.chDataLiteral, strValue2)
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Ser2.Ungroup(True)
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Ser2.Type = ChartChartTypeEnum.chChartTypeLineMarkers
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'添加Z轴
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Dim AxesZ As ChAxis = Chart1.Axes.Add(Ser2.Scalings(ChartDimensionsEnum.chDimValues))
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AxesZ.NumberFormat = "0.00%"
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AxesZ.Position = ChartAxisPositionEnum.chAxisPositionRight
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'给定x,y轴的图示说明
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'默认只有X,Y 两个轴
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Chart1.Axes(-3).HasTitle = True
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Chart1.Axes(-3).Title.Caption = "Y 轴 : 数量"
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Chart1.Axes(-2).HasTitle = True
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Chart1.Axes(-2).Title.Caption = "X 轴: 月份"
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AxesZ.HasTitle = True
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AxesZ.Title.Caption = "Z 轴: Ratio"
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'输出成GIF文件.
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Dim strAbsolutePath As String = "C:Images" & Format(Date.Now, "yyyyMMddhhmmss") & ".gif"
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myChart.ExportPicture(strAbsolutePath, "GIF", 600, 350)
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Me.Image1.ImageUrl = strAbsolutePath
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