图表是简洁显示数据的绝佳工具。此外，它们以可视方式表示数据，从而更易于使用大量数据。在需要显示数据（例如每月预算比较或产品采用率）的情况下，图表可能会有所帮助。有鉴于此，本文将教您如何使用C ++在Excel文件中创建图表。
使用C ++在Excel中创建折线图使用C ++在Excel中创建金字塔图使用C ++在Excel中创建气泡图
Aspose.Cells for C++是本机C ++库，使用它可以创建，读取和修改Excel文件，而无需安装Microsoft Excel。该API还支持在Excel文件中创建图表。下载最新版
使用C ++在Excel中创建折线图
若要创建折线图，请在添加图表时使用ChartType_Line枚举值。以下是在Excel文件中创建折线图的步骤。
首先，创建一个IWorkbook类的实例。使用IWorkbook->GetIWorksheets()->GetObjectByIndex (Aspose::Cells::Systems::Int32 index)方法检索要添加图表的工作表。插入图表的数据。使用IWorksheet->GetICharts()->Add(Aspose::Cells::Charts::ChartType type,Aspose::Cells::Systems::Int32 upperLeftRow,Aspose::Cells::Systems::Int32 upperLeftColumn,Aspose::Cells::Systems::Int32 lowerRightRow,Aspose::Cells::Systems::Int32 lowerRightColumn)方法将图表添加到工作表中。使用IWorksheet->GetICharts()->GetObjectByIndex (Aspose::Cells::Systems::Int32 index)方法访问图表及其索引。使用 IChart->GetNISeries()->Add (intrusive_ptrarea, bool isVertical)方法为图表添加数据源。最后，使用IWorkbook->Save(intrusive_ptrfileName)方法保存Excel文件。
以下是使用C ++在Excel中创建折线图的示例代码。
// Output directory path.StringPtr outDir = new String("OutputDirectory\\");// Path of output excel fileStringPtr outputChartTypeLine = outDir->StringAppend(new String("outputChartTypeLine.xlsx"));// Create a new workbookintrusive_ptrworkbook = Factory::CreateIWorkbook();// Get first worksheet which is created by defaultintrusive_ptrworksheet = workbook->GetIWorksheets()->GetObjectByIndex(0);// Adding sample values to cellsworksheet->GetICells()->GetObjectByIndex(new String("A1"))->PutValue(50);worksheet->GetICells()->GetObjectByIndex(new String("A2"))->PutValue(100);worksheet->GetICells()->GetObjectByIndex(new String("A3"))->PutValue(150);worksheet->GetICells()->GetObjectByIndex(new String("B1"))->PutValue(4);worksheet->GetICells()->GetObjectByIndex(new String("B2"))->PutValue(20);worksheet->GetICells()->GetObjectByIndex(new String("B3"))->PutValue(50);// Adding a chart to the worksheetint chartIndex = worksheet->GetICharts()->Add(Aspose::Cells::Charts::ChartType::ChartType_Line, 5, 0, 20, 8);// Accessing the instance of the newly added chartintrusive_ptrchart = worksheet->GetICharts()->GetObjectByIndex(chartIndex);// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"chart->GetNISeries()->Add(new String("A1:B3"), true);// Saving the Excel fileworkbook->Save(outputChartTypeLine);
使用C ++在Excel中创建金字塔图
若要创建金字塔形图，请在添加统计图时使用ChartType_Pyramid枚举值指定统计图类型。以下是在Excel文件中创建金字塔图的步骤。
首先，创建一个IWorkbook类的实例。使用IWorkbook->GetIWorksheets()->GetObjectByIndex (Aspose::Cells::Systems::Int32 index)方法检索要添加图表的工作表。插入图表的数据。使用IWorksheet->GetICharts()->Add(Aspose::Cells::Charts::ChartType type,Aspose::Cells::Systems::Int32 upperLeftRow,Aspose::Cells::Systems::Int32 upperLeftColumn,Aspose::Cells::Systems::Int32 lowerRightRow,Aspose::Cells::Systems::Int32 lowerRightColumn)方法将图表添加到工作表中。使用IWorksheet->GetICharts()->GetObjectByIndex (Aspose::Cells::Systems::Int32 index)方法访问图表及其索引。使用 IChart->GetNISeries()->Add (intrusive_ptrarea, bool isVertical)方法为图表添加数据源。最后，使用IWorkbook->Save(intrusive_ptrfileName)方法保存Excel文件。
以下是使用C ++在Excel中创建金字塔图的示例代码。
// Output directory path.StringPtr outDir = new String("OutputDirectory\\");// Path of output excel fileStringPtr outputChartTypePyramid = outDir->StringAppend(new String("outputChartTypePyramid.xlsx"));// Create a new workbookintrusive_ptrworkbook = Factory::CreateIWorkbook();// Get first worksheet which is created by defaultintrusive_ptrworksheet = workbook->GetIWorksheets()->GetObjectByIndex(0);// Adding sample values to cellsworksheet->GetICells()->GetObjectByIndex(new String("A1"))->PutValue(50);worksheet->GetICells()->GetObjectByIndex(new String("A2"))->PutValue(100);worksheet->GetICells()->GetObjectByIndex(new String("A3"))->PutValue(150);worksheet->GetICells()->GetObjectByIndex(new String("B1"))->PutValue(4);worksheet->GetICells()->GetObjectByIndex(new String("B2"))->PutValue(20);worksheet->GetICells()->GetObjectByIndex(new String("B3"))->PutValue(50);// Adding a chart to the worksheetint chartIndex = worksheet->GetICharts()->Add(Aspose::Cells::Charts::ChartType::ChartType_Pyramid, 5, 0, 20, 8);// Accessing the instance of the newly added chartintrusive_ptrchart = worksheet->GetICharts()->GetObjectByIndex(chartIndex);// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B3"chart->GetNISeries()->Add(new String("A1:B3"), true);// Saving the Excel fileworkbook->Save(outputChartTypePyramid);
使用C ++在Excel中创建气泡图
为了创建一个气泡图，该传ChartType_Bubble枚举值到IWorksheet-> GetICharts（） - >添加（）方法。以下是在Excel文件中创建气泡图的步骤。
首先，创建一个IWorkbook类的实例。使用IWorkbook-> GetIWorksheets（）-> GetObjectByIndex（Aspose :: Cells :: Systems :: Int32索引）方法检索要在其中添加图表的工作表。插入图表的数据。使用IWorksheet-> GetICharts（）-> Add将图表添加到工作表中（Aspose :: Cells :: Charts :: ChartType类型，Aspose :: Cells :: Systems :: Int32 upperLeftRow，Aspose :: Cells :: Systems： ：Int32 upperLeftColumn，Aspose :: Cells :: Systems :: Int32 lowerRightRow，Aspose :: Cells :: Systems :: Int32 lowerRightColumn）方法。使用IWorksheet-> GetICharts（）-> GetObjectByIndex（Aspose :: Cells :: Systems :: Int32索引）方法访问带有索引的图表。使用 IChart->GetNISeries()->GetObjectByIndex(0)->SetBubbleSizes (intrusive_ptrarea, bool isVertical), IChart->GetNISeries()->GetObjectByIndex(0)->SetBubbleSizes (intrusive_ptr值）、ICchart->GetNISeries()->GetObjectByIndex(0)->SetXValues（intrusive_ptr值）、ICchart->GetNISeries()->GetObjectByIndex(0)->SetValues（intrusive_ptr值）方法分别设置。最后，使用IWorkbook->Save(intrusive_ptrfileName)方法保存Excel文件。
以下是使用C ++在Excel中创建气泡图的示例代码。
// Output directory path.StringPtr outDir = new String("OutputDirectory\\");// Path of output excel fileStringPtr outputChartTypeBubble = outDir->StringAppend(new String("outputChartTypeBubble.xlsx"));// Create a new workbookintrusive_ptrworkbook = Factory::CreateIWorkbook();// Get first worksheet which is created by defaultintrusive_ptrworksheet = workbook->GetIWorksheets()->GetObjectByIndex(0);// Fill in data for chart's series// Y Valuesworksheet->GetICells()->GetObjectByIndex(0, 0)->PutValue((StringPtr)new String("Y Values"));worksheet->GetICells()->GetObjectByIndex(0, 1)->PutValue(2);worksheet->GetICells()->GetObjectByIndex(0, 2)->PutValue(4);worksheet->GetICells()->GetObjectByIndex(0, 3)->PutValue(6);// Bubble Sizeworksheet->GetICells()->GetObjectByIndex(1, 0)->PutValue((StringPtr)new String("Bubble Size"));worksheet->GetICells()->GetObjectByIndex(1, 1)->PutValue(2);worksheet->GetICells()->GetObjectByIndex(1, 2)->PutValue(3);worksheet->GetICells()->GetObjectByIndex(1, 3)->PutValue(1);// X Valuesworksheet->GetICells()->GetObjectByIndex(2, 0)->PutValue((StringPtr)new String("X Values"));worksheet->GetICells()->GetObjectByIndex(2, 1)->PutValue(1);worksheet->GetICells()->GetObjectByIndex(2, 2)->PutValue(2);worksheet->GetICells()->GetObjectByIndex(2, 3)->PutValue(3);// Set first column widthworksheet->GetICells()->SetColumnWidth(0, 12);// Adding a chart to the worksheetint chartIndex = worksheet->GetICharts()->Add(Aspose::Cells::Charts::ChartType::ChartType_Bubble, 5, 0, 20, 8);// Accessing the instance of the newly added chartintrusive_ptrchart = worksheet->GetICharts()->GetObjectByIndex(chartIndex);// Adding SeriesCollection (chart data source) to the chart ranging from B1 to D1chart->GetNISeries()->Add(new String("B1:D1"), true);// Set bubble sizeschart->GetNISeries()->GetObjectByIndex(0)->SetBubbleSizes(new String("B2:D2"));// Set X axis valueschart->GetNISeries()->GetObjectByIndex(0)->SetXValues(new String("B3:D3"));// Set Y axis valueschart->GetNISeries()->GetObjectByIndex(0)->SetValues(new String("B1:D1"));// Saving the Excel fileworkbook->Save(outputChartTypeBubble);
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