Erstellung eines Tortendiagramms mit Führungslinien

Um die Verwendung der Aspose.Cells for .NET-API zum Erstellen eines Tortendiagramms mit Führungslinien zu demonstrieren, werden wir zuerst ein neues Workbook erstellen und einige Daten eingeben, die als Datenquelle für die Serie dienen. Sobald die Daten bereit sind, fügen wir ein Chart vom Typ ChartType.Pie zur Sammlung von Diagrammen hinzu und setzen dessen verschiedene Aspekte, um die gewünschte Diagrammansicht zu erhalten.

// 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;

Bisher haben wir ein Tortendiagramm erstellt und seine verschiedenen Aspekte festgelegt. Jetzt werden wir die Führungslinien für das Diagramm einschalten. Bitte beachten Sie, dass wir die Datenbeschriftungen ein wenig verschieben müssen, um die Führungslinien anzuzeigen.

Der folgende Code aktiviert die Führungslinien, aktualisiert das Diagramm und berechnet dann die Positionen der Datenbeschriftungen, um sie entsprechend zu verschieben.

// 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;
}

Abschließend speichert der folgende Code das Diagramm im Bildformat und die Arbeitsmappe im XLSX-Format.

// 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");
Ergebnis Tortendiagramm
todo:image_alt_text

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