Tres métodos para filtrar datos de gráficos con JavaScript a través de C++
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1. Filtrado de series para representar un gráfico
Pasos para filtrar series de un gráfico en Excel
En Excel, podemos filtrar series específicas de un gráfico, haciendo que esas series filtradas no se muestren en el gráfico. El gráfico original se muestra en Figura 1. Sin embargo, cuando filtramos Testseries2 y Testseries4, el gráfico aparecerá como en la Figura 2.
En Script Aspose.Cells for Java a través de C++, podemos realizar una operación similar. Para un archivo ejemplo como este, si queremos filtrar Testseries2 y Testseries4, podemos ejecutar el siguiente código. Además, mantendremos dos listas: una (Chart.nSeries) para guardar todas las series seleccionadas.
Código de muestra
El siguiente código de muestra carga el archivo de Excel de muestra.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Series Filter 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();
// Instantiate workbook from uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access first worksheet and chart
const worksheet = workbook.worksheets.get(0);
const chart = worksheet.charts.get("Chart 1");
// Get filtered series list and visible series list
const nSeriesFiltered = chart.filteredNSeries;
const nSeries = chart.nSeries;
// Initial counts
const initialFilteredCount = nSeriesFiltered.count;
const initialVisibleCount = nSeries.count;
console.log("Filtered Series count: " + initialFilteredCount);
console.log("Visible Series count: " + initialVisibleCount);
// Process from the end to the beginning - mark series as filtered
nSeries.get(1).isFiltered = true;
nSeries.get(0).isFiltered = true;
// Counts after filtering
const afterFilteredCount = nSeriesFiltered.count;
const afterVisibleCount = nSeries.count;
console.log("Filtered Series count: " + afterFilteredCount);
console.log("Visible Series count: " + afterVisibleCount);
// Save the modified workbook 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 = 'seriesFiltered-out.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
// Re-open the saved workbook from the in-memory output to validate counts
const reopenedWorkbook = new Workbook(outputData);
const reopenedWorksheet = reopenedWorkbook.worksheets.get(0);
const reopenedChart = reopenedWorksheet.charts.get("Chart 1");
const reopenedFiltered = reopenedChart.filteredNSeries;
const reopenedVisible = reopenedChart.nSeries;
const reopenedFilteredCount = reopenedFiltered.count;
const reopenedVisibleCount = reopenedVisible.count;
console.log("Filtered Series count: " + reopenedFilteredCount);
console.log("Visible Series count: " + reopenedVisibleCount);
// Display results to user
document.getElementById('result').innerHTML =
`<p style="color: green;">Initial - Filtered Series count: ${initialFilteredCount}, Visible Series count: ${initialVisibleCount}</p>` +
`<p style="color: green;">After Marking - Filtered Series count: ${afterFilteredCount}, Visible Series count: ${afterVisibleCount}</p>` +
`<p style="color: green;">After Reopen - Filtered Series count: ${reopenedFilteredCount}, Visible Series count: ${reopenedVisibleCount}</p>`;
});
</script>
</html>
2. Filtra los datos y permite que el gráfico cambie
Filtrar tus datos es una excelente manera de manejar filtros de gráficos con muchos datos. Cuando filtras los datos, el gráfico cambiará. Un problema que tendremos que solucionar es asegurarnos de que el gráfico permanezca en pantalla. Cuando filtras, obtienes filas ocultas, y ocasionalmente, el gráfico estará en esas filas ocultas.
Pasos para utilizar los Filtros de Datos para cambiar el gráfico en Excel
- Haz clic dentro de tu rango de datos.
- Haz clic en la pestaña Datos y activa los Filtros haciendo clic en Filtros. Tu fila de encabezado tendrá flechas desplegables.
- Crea un gráfico yendo a la pestaña Insertar y seleccionando un gráfico de columnas.
- Ahora filtra tus datos usando las flechas desplegables en los datos. No uses los Filtros de Gráfico.
Código de muestra
El siguiente código de ejemplo muestra la misma función usando Aspose.Cells.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Autofilter 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>
<a id="imageDownloadLink" style="display: none; margin-left: 10px;">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');
const downloadLink = document.getElementById('downloadLink');
const imageDownloadLink = document.getElementById('imageDownloadLink');
if (!fileInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select an Excel file.</p>';
return;
}
// Ensure Aspose.Cells is initialized
await AsposeCells.onReady();
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
// Instantiate workbook from uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access the worksheet named "Sheet1"
const sheet = workbook.worksheets.get("Sheet1");
// Add data into detail cells
sheet.cells.get(0, 0).putValue("Fruits Name");
sheet.cells.get(0, 1).putValue("Fruits Price");
sheet.cells.get(1, 0).putValue("Apples");
sheet.cells.get(2, 0).putValue("Bananas");
sheet.cells.get(3, 0).putValue("Grapes");
sheet.cells.get(4, 0).putValue("Oranges");
sheet.cells.get(1, 1).putValue(5);
sheet.cells.get(2, 1).putValue(2);
sheet.cells.get(3, 1).putValue(1);
sheet.cells.get(4, 1).putValue(4);
// Add a chart to the worksheet
const chartIndex = sheet.charts.add(AsposeCells.ChartType.Column, 7, 7, 15, 15);
const chart = sheet.charts.get(chartIndex);
// Set data range (converted from setChartDataRange -> chartDataRange property)
chart.chartDataRange = "A1:B5";
// Set AutoFilter range (converted from setRange -> range property)
sheet.autoFilter.range = "A1:B5";
// Add filters for a filter column.
sheet.autoFilter.addFilter(0, "Bananas");
sheet.autoFilter.addFilter(0, "Oranges");
// Apply the filters
sheet.autoFilter.refresh();
// Export chart image (returns image data)
const imageData = chart.toImage("Autofilter.png");
// Save the modified workbook
const outputData = workbook.save(SaveFormat.Xlsx);
// Prepare Excel download link
const blob = new Blob([outputData]);
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'Autofilter.xlsx';
downloadLink.style.display = 'inline-block';
downloadLink.textContent = 'Download Excel File';
// Prepare image download link if image data exists
if (imageData) {
const imgBlob = new Blob([imageData], { type: 'image/png' });
imageDownloadLink.href = URL.createObjectURL(imgBlob);
imageDownloadLink.download = 'Autofilter.png';
imageDownloadLink.style.display = 'inline-block';
imageDownloadLink.textContent = 'Download Chart Image';
} else {
imageDownloadLink.style.display = 'none';
}
resultDiv.innerHTML = '<p style="color: green;">Operation completed successfully! Use the download links to get the modified files.</p>';
});
</script>
</html>
3. Filtra los datos utilizando una Tabla y permite que el gráfico cambie
Utilizar una Tabla es similar al Método 2, utilizando un rango, pero tienes ventajas con las tablas sobre los rangos. Cuando cambias tu rango a una Tabla y agregas datos, el gráfico se actualiza automáticamente. Con un rango, tendrás que cambiar la fuente de datos.
Formatear como tabla en Excel
Haz clic dentro de tus datos y usa CTRL + T o ve a la pestaña Inicio, Formato como Tabla
Código de muestra
El siguiente código de ejemplo carga el archivo de Excel de muestra y muestra la misma función usando Aspose.Cells.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Example Title</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>
<a id="downloadLinkBefore" style="display: none;">Download Before Image</a>
<a id="downloadLinkAfter" style="display: none;">Download After 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');
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));
// Access first worksheet
const sheet = workbook.worksheets.get(0);
// Access the instance of the newly added chart
const chartIndex = sheet.charts.add(AsposeCells.ChartType.Column, 7, 7, 15, 15);
const chart = sheet.charts.get(chartIndex);
// Set data range (converted from setter to property)
chart.chartDataRange = { range: "A1:B7", isVertical: true };
// Convert the chart to image (before)
const beforeImageData = chart.toImage(SaveFormat.Png);
const beforeBlob = new Blob([beforeImageData]);
const beforeLink = document.getElementById('downloadLinkBefore');
beforeLink.href = URL.createObjectURL(beforeBlob);
beforeLink.download = 'TableFilters.before.png';
beforeLink.style.display = 'block';
beforeLink.textContent = 'Download Chart Before Image';
// Add a new List Object to the worksheet
const listObjectIndex = sheet.listObjects.add("A1", "B7", true);
const listObject = sheet.listObjects.get(listObjectIndex);
// Add default style to the table
listObject.tableStyleType = AsposeCells.TableStyleType.TableStyleMedium10;
// Show Total
listObject.showTotals = false;
// Add filters for a filter column.
listObject.autoFilter.addFilter(0, "James");
// Apply the filters
listObject.autoFilter.refresh();
// After adding new value the chart will change
listObject.putCellValue(7, 0, "Me");
listObject.putCellValue(7, 1, 1000);
// Check the changed images (after)
const afterImageData = chart.toImage(SaveFormat.Png);
const afterBlob = new Blob([afterImageData]);
const afterLink = document.getElementById('downloadLinkAfter');
afterLink.href = URL.createObjectURL(afterBlob);
afterLink.download = 'TableFilters.after.png';
afterLink.style.display = 'block';
afterLink.textContent = 'Download Chart After Image';
// Saving the 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 = 'TableFilter.out.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Operation completed successfully! Use the download links to get the result files.</p>';
});
</script>
</html>