Manipola la posizione, le dimensioni e il designer del grafico con JavaScript tramite C++
Contents
[
Hide
]
Posizione e Dimensione del Grafico
A volte si desidera cambiare la posizione o le dimensioni del grafico nuovo o esistente all’interno del foglio di calcolo. Aspose.Cells fornisce la proprietà Chart.chartObject per farlo. Puoi usare le sue sotto-proprietà per ridimensionare il grafico con una nuova altezza e larghezza o per riposizionarlo con nuove coordinate X e Y.
Controllo Posizione e Dimensione del Grafico
Per modificare la posizione (coordinate X, Y) o la dimensione (altezza, larghezza) del grafico, utilizzare queste proprietà:
L’esempio seguente spiega l’uso delle API sopra; carica il workbook esistente che contiene un grafico nel suo primo foglio di lavoro. Poi ridimensiona e riposiziona il grafico usando Aspose.Cells.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells Chart Resize and Reposition 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, Worksheet, Cell } = 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 by opening the Excel file from the file input
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Accessing the second worksheet in the Excel file (index 1)
const worksheet = workbook.worksheets.get(1);
// Load the chart from source worksheet (first chart)
const chart = worksheet.charts.get(0);
// Resize the chart
chart.chartObject.width = 400;
chart.chartObject.height = 300;
// Reposition the chart
chart.chartObject.x = 250;
chart.chartObject.y = 150;
// Saving the modified 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 = 'chart.out.xls';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
resultDiv.innerHTML = '<p style="color: green;">Chart resized and repositioned successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
Manipolazione dei Grafici del Designer
Ci sono momenti in cui è necessario manipolare o modificare grafici nei file di modello del designer. Aspose.Cells supporta pienamente la manipolazione dei contenuti e degli elementi del grafico del designer. I dati, i contenuti del grafico, l’immagine di sfondo e la formattazione possono essere preservati con precisione.
Manipolazione dei Grafici del Designer nei File di Modello
Per manipolare i grafici del designer nei file modello, usa l’API relativa ai grafici. Ad esempio, puoi usare la proprietà Worksheet.charts per ottenere la collezione di grafici esistenti nel file del modello.
Creazione di un Grafico
L’esempio seguente mostra come creare un grafico a piramide. Manipoleremo successivamente questo grafico.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells - Create Workbook with Pyramid Chart</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;
const readyPromise = 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 () => {
await readyPromise;
// Instantiating a Workbook object
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 = 150;
worksheet.cells.get("B1").value = 4;
worksheet.cells.get("B2").value = 20;
worksheet.cells.get("B3").value = 50;
// Adding a chart to the worksheet
const chartIndex = worksheet.charts.add(ChartType.Pyramid, 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 "B3"
chart.nSeries.add("A1:B3", 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 = 'book1.out.xls';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Workbook created and chart added. Click the download link to get the file.</p>';
});
</script>
</html>
Manipolazione del Grafico
L’esempio seguente mostra come manipolare il grafico esistente. In questo esempio, modifichiamo il grafico creato in precedenza. Nell’output generato, si noti che l’etichetta di data di un punto dati è stata impostata su ‘Regno Unito, 30K’.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Pie Chart Data Label Update</title>
</head>
<body>
<h1>Update Pie Chart Data Label 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 () => {
const fileInput = document.getElementById('fileInput');
if (!fileInput.files.length) {
document.getElementById('result').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 uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Get the designer chart in the second sheet.
const sheet = workbook.worksheets.get(1);
const chart = sheet.charts.get(0);
// Get the data labels in the data series of the third data point.
const dataLabels = chart.nSeries.get(0).points.get(2).dataLabels;
// Change the text of the label.
dataLabels.text = "Unided Kingdom, 400K ";
// Save the modified 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 Modified Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Data label updated successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
Manipolazione di un Grafico a Linee nel Modello del Designer
In questo esempio, manipoleremo un grafico a linee. Aggiungeremo alcune serie di dati al grafico esistente e ne cambieremo i colori delle linee.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells Chart Series 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, Worksheet, Cell } = 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');
if (!fileInput.files.length) {
document.getElementById('result').innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiate Workbook from uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Get the designer chart in the first worksheet.
const worksheet = workbook.worksheets.get(0);
const chart = worksheet.charts.get(0);
// Add the third data series to it.
chart.nSeries.add("{60, 80, 10}", true);
// Add another data series (fourth) to it.
chart.nSeries.add("{0.3, 0.7, 1.2}", true);
// Plot the fourth data series on the second axis.
chart.nSeries.get(3).plotOnSecondAxis = true;
// Change the Border color of the second data series.
chart.nSeries.get(1).border.color = AsposeCells.Color.Green;
// Change the Border color of the third data series.
chart.nSeries.get(2).border.color = AsposeCells.Color.Red;
// Make the second value axis visible.
chart.secondValueAxis.isVisible = true;
// Save the excel file and provide 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 Modified 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>