使用 JavaScript 通过 C++ 更新 ActiveX 组合框控件
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可能的使用场景
你可以使用 Aspose.Cells for JavaScript 通过 C++ 读取或写入 ActiveX 组合框控件的值。请通过 Shape.activeXControl 属性访问 ActiveX 控件，并通过 ActiveXControlBase.type 属性检查其类型，应返回 ControlType.ComboBox 值，然后将其强制转换成 ComboBoxActiveXControl 对象，读取或修改其各种属性。
请下载以下示例代码中使用的 示例 Excel 文件。
更新ActiveX ComboBox控件
以下截图显示了样本代码对 样本excel文件 的效果。正如你所看到的，活动X组合框的值已更新为"This is combo box control"。
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示例代码
以下样本代码更新了 样本excel文件 中存在的活动X组合框控件的值。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example - Update ActiveX ComboBox</title>
</head>
<body>
<h1>Update ActiveX ComboBox in Workbook</h1>
<input type="file" id="fileInput" accept=".xls,.xlsx,.xlsm" />
<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 a Workbook from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Access first worksheet and first shape
const worksheet = workbook.worksheets.get(0);
const shape = worksheet.shapes.get(0);
// Access ActiveX ComboBox Control and update its value
if (shape.activeXControl != null) {
const c = shape.activeXControl;
if (c instanceof AsposeCells.ComboBoxActiveXControl) {
// Type cast ActiveXControl into ComboBoxActiveXControl and change its value
const comboBoxActiveX = new AsposeCells.ComboBoxActiveXControl(c);
comboBoxActiveX.value = "This is combo box control with updated value.";
}
}
// Save the 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 = 'OutputFile_out.xlsx';
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>