在加载Excel文件时解析透视缓存记录
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可能的使用场景
创建透视表时，Microsoft Excel会复制源数据并将其存储在透视缓存中。透视缓存保存在Microsoft Excel的内存中。您看不到它，但这是建立透视表、更改切片选择或移动行/列时透视表引用的数据。这使得Microsoft Excel能够对透视表的更改做出非常灵敏的响应，但它也可能使文件的大小翻倍。毕竟，透视缓存只是源数据的副本，因此您的文件大小可能会翻倍。
当你在Workbook对象内加载Excel文件时，可以通过LoadOptions.parsingPivotCachedRecords属性决定是否也加载Pivot缓存的记录。该属性的默认值为false。如果Pivot缓存较大，可以提高性能。但如果你也想加载Pivot缓存的记录，应将此属性设置为true。
在加载Excel文件时解析透视缓存记录
以下示例代码说明了LoadOptions.parsingPivotCachedRecords属性的用法。在解析Pivot缓存记录的同时加载示例Excel文件，然后刷新数据透视表，并保存为输出Excel文件。
示例代码
<!DOCTYPE html>
<html>
<head>
<title>Parsing Pivot Cached Records While Loading Example</title>
</head>
<body>
<h1>Parsing Pivot Cached Records While Loading 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, LoadOptions } = 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');
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();
// Create load options
const options = new LoadOptions();
// Set ParsingPivotCachedRecords true, default value is false
options.parsingPivotCachedRecords = true;
// Load the Excel file with load options
const wb = new Workbook(new Uint8Array(arrayBuffer), options);
// Access first worksheet
const ws = wb.worksheets.get(0);
// Access first pivot table
const pt = ws.pivotTables.get(0);
// Set refresh data flag true
pt.refreshDataFlag = true;
// Refresh and calculate pivot table
pt.refreshData();
pt.calculateData();
// Set refresh data flag false
pt.refreshDataFlag = false;
// Save the output Excel file
const outputData = wb.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'outputParsingPivotCachedRecordsWhileLoadingExcelFile.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
resultDiv.innerHTML = '<p style="color: green;">Operation completed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>