Sätt datakälla för diagrammet med JavaScript via C++
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I våra tidigare ämnen har vi redan gett många exempel för att visa hur du kan ställa in en datakälla för ditt diagram men i detta ämne ska vi ge mer detaljer om de typer av data som kan ställas in för ett diagram.
Ställa in Diagramdata
Det finns två typer av data att hantera när man arbetar med diagram med hjälp av Aspose.Cells som följer:
- Diagramdata.
- Kategoridata.
Diagramdata
Diagramdata är den data vi använder som datakälla för att skapa våra diagram. Vi kan lägga till ett cellområde (innehållande diagramdata) genom att anropa SeriesCollection-objektets add(string, boolean)-metod.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Add Worksheet and 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 } = 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 () => {
// Instantiate a new Workbook
const workbook = new Workbook();
// Adding a new worksheet to the Excel object
const sheetIndex = workbook.worksheets.add();
// Obtaining the reference of the newly added worksheet by passing its sheet index
const worksheet = workbook.worksheets.get(sheetIndex);
// Adding sample values to cells
worksheet.cells.get("A1").value = 50;
worksheet.cells.get("A2").value = 100;
worksheet.cells.get("A3").value = 170;
worksheet.cells.get("A4").value = 300;
worksheet.cells.get("B1").value = 160;
worksheet.cells.get("B2").value = 32;
worksheet.cells.get("B3").value = 50;
worksheet.cells.get("B4").value = 40;
// Adding sample values to cells as category data
worksheet.cells.get("C1").value = "Q1";
worksheet.cells.get("C2").value = "Q2";
worksheet.cells.get("C3").value = "Y1";
worksheet.cells.get("C4").value = "Y2";
// Adding a chart to the worksheet
const chartIndex = worksheet.charts.add(AsposeCells.ChartType.Column, 5, 0, 15, 5);
// Accessing the instance of the newly added chart
const chart = worksheet.charts.get(chartIndex);
// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B4"
chart.nSeries.add("A1:B4", true);
// Saving the Excel file
const outputData = workbook.save(SaveFormat.Excel97To2003);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xls';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Workbook created successfully! Click the download link to get the file.</p>';
});
</script>
</html>
Kategoridata
Kategoridata används för märkningsetiketter på diagramdata och kan läggas till i SeriesCollection med dess categoryData-egenskap. Ett komplett exempel ges nedan för att visa användningen av diagram- och kategoridata. Efter att ha kört ovanstående kodexempel kommer ett kolumn diagram att läggas till i arbetsbladet som visas nedan.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells - Create Workbook with 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 } = 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');
// Instantiate or load workbook
let workbook;
if (fileInput.files.length) {
const arrayBuffer = await fileInput.files[0].arrayBuffer();
workbook = new Workbook(new Uint8Array(arrayBuffer));
} else {
workbook = new Workbook();
}
// Adding a new worksheet to the Excel object
const sheetIndex = workbook.worksheets.add();
// Obtaining the reference of the newly added worksheet by passing its sheet index
const worksheet = workbook.worksheets.get(sheetIndex);
// Adding sample values to cells
worksheet.cells.get("A1").putValue(10);
worksheet.cells.get("A2").putValue(100);
worksheet.cells.get("A3").putValue(170);
worksheet.cells.get("A4").putValue(200);
worksheet.cells.get("B1").putValue(120);
worksheet.cells.get("B2").putValue(320);
worksheet.cells.get("B3").putValue(50);
worksheet.cells.get("B4").putValue(40);
// Adding sample values to cells as category data
worksheet.cells.get("C1").putValue("Q1");
worksheet.cells.get("C2").putValue("Q2");
worksheet.cells.get("C3").putValue("Y1");
worksheet.cells.get("C4").putValue("Y2");
// Adding a chart to the worksheet
const chartIndex = worksheet.charts.add(ChartType.Column, 5, 0, 15, 5);
// Accessing the instance of the newly added chart
const chart = worksheet.charts.get(chartIndex);
// Adding SeriesCollection (chart data source) to the chart ranging from "A1" cell to "B4"
chart.nSeries.add("A1:B4", true);
// Setting the data source for the category data of SeriesCollection
chart.nSeries.categoryData = "C1:C4";
// Saving the Excel file and creating a download link
const outputData = workbook.save(SaveFormat.Excel97To2003);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xls';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Workbook created. Click the download link to save the file.</p>';
});
</script>
</html>