Créer un graphique circulaire avec lignes de repère

Pour illustrer l’utilisation de l’API Aspose.Cells for .NET pour créer un graphique circulaire avec des lignes de repère, nous allons d’abord créer un nouveau Workbook et saisir des données qui serviront de source de données de série. Une fois les données en place, nous ajouterons un Chart de type ChartType.Pie à la collection de graphiques et en réglerons les différents aspects pour obtenir la vue de graphique souhaitée.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// Create an instance of Workbook in XLSX format
Workbook workbook = new Workbook(FileFormatType.Xlsx);
// Access the first worksheet
Worksheet worksheet = workbook.Worksheets[0];
// Add two columns of data
worksheet.Cells["A1"].PutValue("Retail");
worksheet.Cells["A2"].PutValue("Services");
worksheet.Cells["A3"].PutValue("Info & Communication");
worksheet.Cells["A4"].PutValue("Transport Equip");
worksheet.Cells["A5"].PutValue("Construction");
worksheet.Cells["A6"].PutValue("Other Products");
worksheet.Cells["A7"].PutValue("Wholesale");
worksheet.Cells["A8"].PutValue("Land Transport");
worksheet.Cells["A9"].PutValue("Air Transport");
worksheet.Cells["A10"].PutValue("Electric Appliances");
worksheet.Cells["A11"].PutValue("Securities");
worksheet.Cells["A12"].PutValue("Textiles & Apparel");
worksheet.Cells["A13"].PutValue("Machinery");
worksheet.Cells["A14"].PutValue("Metal Products");
worksheet.Cells["A15"].PutValue("Cash");
worksheet.Cells["A16"].PutValue("Banks");
worksheet.Cells["B1"].PutValue(10.4);
worksheet.Cells["B2"].PutValue(5.2);
worksheet.Cells["B3"].PutValue(6.4);
worksheet.Cells["B4"].PutValue(10.4);
worksheet.Cells["B5"].PutValue(7.9);
worksheet.Cells["B6"].PutValue(4.1);
worksheet.Cells["B7"].PutValue(3.5);
worksheet.Cells["B8"].PutValue(5.7);
worksheet.Cells["B9"].PutValue(3);
worksheet.Cells["B10"].PutValue(14.7);
worksheet.Cells["B11"].PutValue(3.6);
worksheet.Cells["B12"].PutValue(2.8);
worksheet.Cells["B13"].PutValue(7.8);
worksheet.Cells["B14"].PutValue(2.4);
worksheet.Cells["B15"].PutValue(1.8);
worksheet.Cells["B16"].PutValue(10.1);
// Create a pie chart and add it to the collection of charts
int id = worksheet.Charts.Add(ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
Chart chart = worksheet.Charts[id];
// Set series data range
chart.NSeries.Add("B1:B16", true);
// Set category data range
chart.NSeries.CategoryData = "A1:A16";
// Turn off legend
chart.ShowLegend = false;
// Access data labels
DataLabels dataLabels = chart.NSeries[0].DataLabels;
// Turn on category names
dataLabels.ShowCategoryName = true;
// Turn on percentage format
dataLabels.ShowPercentage = true;
// Set position
dataLabels.Position = LabelPositionType.OutsideEnd;
// Set separator
dataLabels.SeparatorType = DataLabelsSeparatorType.Comma;

Jusqu’à présent, nous avons créé un graphique circulaire et réglé ses différents aspects. Maintenant, nous allons activer les lignes de repère pour le graphique. Veuillez noter que pour afficher les lignes de repère, nous devons déplacer légèrement les étiquettes de données.

Le code suivant active les lignes de repère, actualise le graphique, puis calcule les positions des étiquettes de données pour les déplacer en conséquence.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// Create an instance of Workbook in XLSX format
Workbook workbook = new Workbook(FileFormatType.Xlsx);
// Access the first worksheet
Worksheet worksheet = workbook.Worksheets[0];
// Add two columns of data
worksheet.Cells["A1"].PutValue("Retail");
worksheet.Cells["A2"].PutValue("Services");
worksheet.Cells["A3"].PutValue("Info & Communication");
worksheet.Cells["A4"].PutValue("Transport Equip");
worksheet.Cells["A5"].PutValue("Construction");
worksheet.Cells["A6"].PutValue("Other Products");
worksheet.Cells["A7"].PutValue("Wholesale");
worksheet.Cells["A8"].PutValue("Land Transport");
worksheet.Cells["A9"].PutValue("Air Transport");
worksheet.Cells["A10"].PutValue("Electric Appliances");
worksheet.Cells["A11"].PutValue("Securities");
worksheet.Cells["A12"].PutValue("Textiles & Apparel");
worksheet.Cells["A13"].PutValue("Machinery");
worksheet.Cells["A14"].PutValue("Metal Products");
worksheet.Cells["A15"].PutValue("Cash");
worksheet.Cells["A16"].PutValue("Banks");
worksheet.Cells["B1"].PutValue(10.4);
worksheet.Cells["B2"].PutValue(5.2);
worksheet.Cells["B3"].PutValue(6.4);
worksheet.Cells["B4"].PutValue(10.4);
worksheet.Cells["B5"].PutValue(7.9);
worksheet.Cells["B6"].PutValue(4.1);
worksheet.Cells["B7"].PutValue(3.5);
worksheet.Cells["B8"].PutValue(5.7);
worksheet.Cells["B9"].PutValue(3);
worksheet.Cells["B10"].PutValue(14.7);
worksheet.Cells["B11"].PutValue(3.6);
worksheet.Cells["B12"].PutValue(2.8);
worksheet.Cells["B13"].PutValue(7.8);
worksheet.Cells["B14"].PutValue(2.4);
worksheet.Cells["B15"].PutValue(1.8);
worksheet.Cells["B16"].PutValue(10.1);
// Create a pie chart and add it to the collection of charts
int id = worksheet.Charts.Add(ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
Chart chart = worksheet.Charts[id];
// Set series data range
chart.NSeries.Add("B1:B16", true);
// Set category data range
chart.NSeries.CategoryData = "A1:A16";
// Turn off legend
chart.ShowLegend = false;
// Access data labels
DataLabels dataLabels = chart.NSeries[0].DataLabels;
// Turn on category names
dataLabels.ShowCategoryName = true;
// Turn on percentage format
dataLabels.ShowPercentage = true;
// Set position
dataLabels.Position = LabelPositionType.OutsideEnd;
// Set separator
dataLabels.SeparatorType = DataLabelsSeparatorType.Comma;
// Turn on leader lines
chart.NSeries[0].HasLeaderLines = true;
// Calculete chart
chart.Calculate();
// You need to move DataLabels a little leftward or rightward depending on their position to show leader lines
int DELTA = 100;
for (int i = 0; i < chart.NSeries[0].Points.Count; i++)
{
int X = chart.NSeries[0].Points[i].DataLabels.X;
// If it is greater than 2000, then move the X position a little right otherwise move the X position a little left
if (X > 2000)
chart.NSeries[0].Points[i].DataLabels.X = X + DELTA;
else
chart.NSeries[0].Points[i].DataLabels.X = X - DELTA;
}

Enfin, le code suivant sauvegarde le graphique au format image et le classeur au format XLSX.

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET
// Create an instance of Workbook in XLSX format
Workbook workbook = new Workbook(FileFormatType.Xlsx);
// Access the first worksheet
Worksheet worksheet = workbook.Worksheets[0];
// Add two columns of data
worksheet.Cells["A1"].PutValue("Retail");
worksheet.Cells["A2"].PutValue("Services");
worksheet.Cells["A3"].PutValue("Info & Communication");
worksheet.Cells["A4"].PutValue("Transport Equip");
worksheet.Cells["A5"].PutValue("Construction");
worksheet.Cells["A6"].PutValue("Other Products");
worksheet.Cells["A7"].PutValue("Wholesale");
worksheet.Cells["A8"].PutValue("Land Transport");
worksheet.Cells["A9"].PutValue("Air Transport");
worksheet.Cells["A10"].PutValue("Electric Appliances");
worksheet.Cells["A11"].PutValue("Securities");
worksheet.Cells["A12"].PutValue("Textiles & Apparel");
worksheet.Cells["A13"].PutValue("Machinery");
worksheet.Cells["A14"].PutValue("Metal Products");
worksheet.Cells["A15"].PutValue("Cash");
worksheet.Cells["A16"].PutValue("Banks");
worksheet.Cells["B1"].PutValue(10.4);
worksheet.Cells["B2"].PutValue(5.2);
worksheet.Cells["B3"].PutValue(6.4);
worksheet.Cells["B4"].PutValue(10.4);
worksheet.Cells["B5"].PutValue(7.9);
worksheet.Cells["B6"].PutValue(4.1);
worksheet.Cells["B7"].PutValue(3.5);
worksheet.Cells["B8"].PutValue(5.7);
worksheet.Cells["B9"].PutValue(3);
worksheet.Cells["B10"].PutValue(14.7);
worksheet.Cells["B11"].PutValue(3.6);
worksheet.Cells["B12"].PutValue(2.8);
worksheet.Cells["B13"].PutValue(7.8);
worksheet.Cells["B14"].PutValue(2.4);
worksheet.Cells["B15"].PutValue(1.8);
worksheet.Cells["B16"].PutValue(10.1);
// Create a pie chart and add it to the collection of charts
int id = worksheet.Charts.Add(ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
Chart chart = worksheet.Charts[id];
// Set series data range
chart.NSeries.Add("B1:B16", true);
// Set category data range
chart.NSeries.CategoryData = "A1:A16";
// Turn off legend
chart.ShowLegend = false;
// Access data labels
DataLabels dataLabels = chart.NSeries[0].DataLabels;
// Turn on category names
dataLabels.ShowCategoryName = true;
// Turn on percentage format
dataLabels.ShowPercentage = true;
// Set position
dataLabels.Position = LabelPositionType.OutsideEnd;
// Set separator
dataLabels.SeparatorType = DataLabelsSeparatorType.Comma;
// In order to save the chart image, create an instance of ImageOrPrintOptions
ImageOrPrintOptions anOption = new ImageOrPrintOptions();
// Set image format
anOption.ImageType = Drawing.ImageType.Png;
// Set resolution
anOption.HorizontalResolution = 200;
anOption.VerticalResolution = 200;
// Render chart to image
chart.ToImage(dataDir + "output_out.png", anOption);
// Save the workbook to see chart inside the Excel
workbook.Save(dataDir + "output_out.xlsx");
Diagramme circulaire résultant
todo:image_alt_text

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