使用JavaScript通过C++获取或设置嵌入式OLE对象的类别标识符
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可能的使用场景
Aspose.Cells提供了 OleObject.classIdentifier 属性，可以用来获取或设置嵌入OLE对象的类别标识符。OLE对象类别标识符实际上是GUID，即全局唯一标识符。GUID长度始终为16字节，因此类别标识符也是16字节。它们通常存放在Windows注册表中，向主应用程序提供如何打开包含各种嵌入资源的OLE对象的信息。
获取或设置嵌入的OLE对象的类标识符
下面的截图显示了从示例Excel文件中读取的OLE对象类标识符（GUID）。
示例代码
请参见用示例Excel文件执行的以下示例代码及其控制台输出，输出打印了OLE对象的类标识符（GUID），与截图中显示的完全相同。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Extract OLE Object Class Identifier (GUID)</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx" />
<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, Utils } = 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 its first worksheet
const worksheet = workbook.worksheets.get(0);
// Access first ole object inside the worksheet
const oleObject = worksheet.oleObjects.get(0);
// Convert 16-bytes array into GUID
const bytes = new Uint8Array(oleObject.classIdentifier);
const guid = bytes.reduce((acc, byte) => acc + String.fromCharCode(byte), '');
// Print the GUID
console.log(guid.toUpperCase());
resultDiv.innerHTML = `<p style="color: green;">GUID: ${guid.toUpperCase()}</p>`;
});
</script>
</html>
控制台输出
以上示例代码执行后生成的控制台输出。
DC020317-E6E2-4A62-B9FA-B3EFE16626F4