Skapa pajdiagram med ledarlinjer med JavaScript via C++
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Denna artikel förklarar hur man skapar ett pajdiagram med ledarlinjer från grunden med hjälp av Aspose.Cells for JavaScript via C++-API. I Excel är alternativet ‘Visa ledarlinjer’ förinställt så när du skapar ett pajdiagram i Excel visas ledarlinjerna. Men när du skapar en liknande diagram med Aspose.Cells API:er måste du uttryckligen sätta egenskapen Series.hasLeaderLines.
För att visa användningen av Aspose.Cells for JavaScript via C++ API för att skapa ett tårtdiagram med ledare, kommer vi först att skapa ett Workbook och mata in några data som kommer att fungera som serie datakälla. När datan är på plats, lägger vi till ett Chart av typ ChartType.Pie till diagramsamlingen och ställer in dess olika aspekter för att få den önskade diagramvisningen.
<!DOCTYPE html>
<html>
<head>
<title>Create Pie Chart Example</title>
</head>
<body>
<h1>Create Pie Chart Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, ChartType, LabelPositionType, DataLabelsSeparatorType } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
const resultDiv = document.getElementById('result');
if (!fileInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiating a Workbook object from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
// Add two columns of data
worksheet.cells.get("A1").putValue("Retail");
worksheet.cells.get("A2").putValue("Services");
worksheet.cells.get("A3").putValue("Info & Communication");
worksheet.cells.get("A4").putValue("Transport Equip");
worksheet.cells.get("A5").putValue("Construction");
worksheet.cells.get("A6").putValue("Other Products");
worksheet.cells.get("A7").putValue("Wholesale");
worksheet.cells.get("A8").putValue("Land Transport");
worksheet.cells.get("A9").putValue("Air Transport");
worksheet.cells.get("A10").putValue("Electric Appliances");
worksheet.cells.get("A11").putValue("Securities");
worksheet.cells.get("A12").putValue("Textiles & Apparel");
worksheet.cells.get("A13").putValue("Machinery");
worksheet.cells.get("A14").putValue("Metal Products");
worksheet.cells.get("A15").putValue("Cash");
worksheet.cells.get("A16").putValue("Banks");
worksheet.cells.get("B1").putValue(10.4);
worksheet.cells.get("B2").putValue(5.2);
worksheet.cells.get("B3").putValue(6.4);
worksheet.cells.get("B4").putValue(10.4);
worksheet.cells.get("B5").putValue(7.9);
worksheet.cells.get("B6").putValue(4.1);
worksheet.cells.get("B7").putValue(3.5);
worksheet.cells.get("B8").putValue(5.7);
worksheet.cells.get("B9").putValue(3);
worksheet.cells.get("B10").putValue(14.7);
worksheet.cells.get("B11").putValue(3.6);
worksheet.cells.get("B12").putValue(2.8);
worksheet.cells.get("B13").putValue(7.8);
worksheet.cells.get("B14").putValue(2.4);
worksheet.cells.get("B15").putValue(1.8);
worksheet.cells.get("B16").putValue(10.1);
// Create a pie chart and add it to the collection of charts
const id = worksheet.charts.add(ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
const chart = worksheet.charts.get(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
const dataLabels = chart.nSeries.get(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;
// Saving the modified Excel file
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
resultDiv.innerHTML = '<p style="color: green;">Operation completed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
Hittills har vi skapat ett cirkeldiagram och ställt in dess olika aspekter. Nu kommer vi att slå på ledarlänkarna för diagrammet. Observera, för att visa ledarlänkar måste vi flytta dataetiketterna lite.
Följande kodsnutt slår på ledarlänkarna, uppdaterar diagrammet och beräknar sedan dataetiketternas positioner för att flytta dem på lämpligt sätt.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Pie Chart Example</title>
</head>
<body>
<h1>Aspose.Cells Pie Chart Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, ChartType, LabelPositionType, DataLabelsSeparatorType } = AsposeCells;
const initPromise = AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
await initPromise;
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiating a Workbook object by opening the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
const cells = worksheet.cells;
// Add two columns of data
cells.get("A1").value = "Retail";
cells.get("A2").value = "Services";
cells.get("A3").value = "Info & Communication";
cells.get("A4").value = "Transport Equip";
cells.get("A5").value = "Construction";
cells.get("A6").value = "Other Products";
cells.get("A7").value = "Wholesale";
cells.get("A8").value = "Land Transport";
cells.get("A9").value = "Air Transport";
cells.get("A10").value = "Electric Appliances";
cells.get("A11").value = "Securities";
cells.get("A12").value = "Textiles & Apparel";
cells.get("A13").value = "Machinery";
cells.get("A14").value = "Metal Products";
cells.get("A15").value = "Cash";
cells.get("A16").value = "Banks";
cells.get("B1").value = 10.4;
cells.get("B2").value = 5.2;
cells.get("B3").value = 6.4;
cells.get("B4").value = 10.4;
cells.get("B5").value = 7.9;
cells.get("B6").value = 4.1;
cells.get("B7").value = 3.5;
cells.get("B8").value = 5.7;
cells.get("B9").value = 3;
cells.get("B10").value = 14.7;
cells.get("B11").value = 3.6;
cells.get("B12").value = 2.8;
cells.get("B13").value = 7.8;
cells.get("B14").value = 2.4;
cells.get("B15").value = 1.8;
cells.get("B16").value = 10.1;
// Create a pie chart and add it to the collection of charts
const id = worksheet.charts.add(ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
const chart = worksheet.charts.get(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
const dataLabels = chart.nSeries.get(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.get(0).hasLeaderLines = true;
// Calculate chart
chart.calculate();
// You need to move DataLabels a little leftward or rightward depending on their position to show leader lines
const DELTA = 100;
const series0 = chart.nSeries.get(0);
for (let i = 0; i < series0.points.count; i++) {
const pt = series0.points.get(i);
let X = pt.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)
pt.dataLabels.x = X + DELTA;
else
pt.dataLabels.x = X - DELTA;
}
// Save the modified Excel file and provide download link
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Operation completed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
Slutligen sparar följande kod diagrammet i bildformat och arbetsboken i XLSX-format.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Create Pie Chart Example</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none; margin-right: 10px;">Download Excel File</a>
<a id="downloadImageLink" style="display: none;">Download Chart Image</a>
<div id="result"></div>
</body>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat } = AsposeCells;
AsposeCells.onReady({
license: "/lic/aspose.cells.enc",
fontPath: "/fonts/",
fontList: [
"arial.ttf",
"NotoSansSC-Regular.ttf"
]
}).then(() => {
console.log("Aspose.Cells initialized");
});
document.getElementById('runExample').addEventListener('click', async () => {
const fileInput = document.getElementById('fileInput');
const resultDiv = document.getElementById('result');
resultDiv.innerHTML = '';
// If a file is provided, load it. Otherwise create a new workbook in XLSX format.
let workbook;
if (fileInput.files && fileInput.files.length > 0) {
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
workbook = new Workbook(new Uint8Array(arrayBuffer));
} else {
workbook = new Workbook(AsposeCells.FileFormatType.Xlsx);
}
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
// Add two columns of data
worksheet.cells.get("A1").putValue("Retail");
worksheet.cells.get("A2").putValue("Services");
worksheet.cells.get("A3").putValue("Info & Communication");
worksheet.cells.get("A4").putValue("Transport Equip");
worksheet.cells.get("A5").putValue("Construction");
worksheet.cells.get("A6").putValue("Other Products");
worksheet.cells.get("A7").putValue("Wholesale");
worksheet.cells.get("A8").putValue("Land Transport");
worksheet.cells.get("A9").putValue("Air Transport");
worksheet.cells.get("A10").putValue("Electric Appliances");
worksheet.cells.get("A11").putValue("Securities");
worksheet.cells.get("A12").putValue("Textiles & Apparel");
worksheet.cells.get("A13").putValue("Machinery");
worksheet.cells.get("A14").putValue("Metal Products");
worksheet.cells.get("A15").putValue("Cash");
worksheet.cells.get("A16").putValue("Banks");
worksheet.cells.get("B1").putValue(10.4);
worksheet.cells.get("B2").putValue(5.2);
worksheet.cells.get("B3").putValue(6.4);
worksheet.cells.get("B4").putValue(10.4);
worksheet.cells.get("B5").putValue(7.9);
worksheet.cells.get("B6").putValue(4.1);
worksheet.cells.get("B7").putValue(3.5);
worksheet.cells.get("B8").putValue(5.7);
worksheet.cells.get("B9").putValue(3);
worksheet.cells.get("B10").putValue(14.7);
worksheet.cells.get("B11").putValue(3.6);
worksheet.cells.get("B12").putValue(2.8);
worksheet.cells.get("B13").putValue(7.8);
worksheet.cells.get("B14").putValue(2.4);
worksheet.cells.get("B15").putValue(1.8);
worksheet.cells.get("B16").putValue(10.1);
// Create a pie chart and add it to the collection of charts
const id = worksheet.charts.add(AsposeCells.ChartType.Pie, 3, 3, 23, 13);
// Access newly created Chart instance
const chart = worksheet.charts.get(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
const dataLabels = chart.nSeries.get(0).dataLabels;
// Turn on category names
dataLabels.showCategoryName = true;
// Turn on percentage format
dataLabels.showPercentage = true;
// Set position
dataLabels.position = AsposeCells.LabelPositionType.OutsideEnd;
// Set separator
dataLabels.separatorType = AsposeCells.DataLabelsSeparatorType.Comma;
// In order to save the chart image, create an instance of ImageOrPrintOptions
const anOption = new AsposeCells.ImageOrPrintOptions();
// Set image format
anOption.imageType = AsposeCells.ImageType.Png;
// Set resolution
anOption.horizontalResolution = 200;
anOption.verticalResolution = 200;
// Render chart to image (returns image byte array in browser)
const imageData = chart.toImage(anOption);
const imageBlob = new Blob([imageData], { type: 'image/png' });
const downloadImageLink = document.getElementById('downloadImageLink');
downloadImageLink.href = URL.createObjectURL(imageBlob);
downloadImageLink.download = 'output_out.png';
downloadImageLink.style.display = 'inline-block';
downloadImageLink.textContent = 'Download Chart Image';
// Save the workbook to see chart inside the Excel
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' });
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output_out.xlsx';
downloadLink.style.display = 'inline-block';
downloadLink.textContent = 'Download Excel File';
resultDiv.innerHTML = '<p style="color: green;">Chart created and files are ready. Click the download links to get the results.</p>';
});
</script>
</html>
| Resulterande Cirkeldiagram |
|---|
 |
Fortsatta ämnen
- Anpassade färgval för skiv- eller sektorfärger i cirkeldiagram
- Ta reda på om datapunkterna finns i den andra pajen eller stapeln på ett paj- eller stapeldiagram