---
title: 添加自定义XML部分并通过ID用JavaScript在C++中选择
linktitle: 添加自定义XML部件并按ID选择
type: docs
weight: 70
url: /zh/javascript-cpp/add-custom-xml-parts-and-select-them-by-id/
description: 学习如何向Excel文档添加自定义XML部分，并使用Aspose.Cells for JavaScript通过C++按ID选择它们。
---
## **可能的使用场景**
自定义XML部分是存储在Microsoft Excel文档内的XML数据，供处理该数据的应用使用。当前尚无直接通过Microsoft Excel UI添加的方法，但可以通过编程以各种方式添加，例如使用VSTO、Aspose.Cells等。请使用[**Workbook.customXmlParts**](https://reference.aspose.com/cells/javascript-cpp/workbook/#customXmlParts--)集合通过Aspose.Cells API添加自定义XML部分，也可通过[**CustomXmlPart.iD**](https://reference.aspose.com/cells/javascript-cpp/customxmlpart/#iD--)属性设置其ID。同样，若要按ID选择自定义XML部分，可以使用[**Workbook.customXmlParts**](https://reference.aspose.com/cells/javascript-cpp/workbook/#customXmlParts--)集合。
## **添加自定义XML部件并按ID选择**
以下示例代码首先通过[**Workbook.customXmlParts**](https://reference.aspose.com/cells/javascript-cpp/workbook/#customXmlParts--)集合添加了四个自定义XML部分，然后使用[**CustomXmlPart.iD**](https://reference.aspose.com/cells/javascript-cpp/customxmlpart/#iD--)属性设置它们的ID，最后使用[**Workbook.customXmlParts**](https://reference.aspose.com/cells/javascript-cpp/workbook/#customXmlParts--)集合查找或选择其中一个添加的自定义XML部分。请参考下面的控制台输出。
## **示例代码**
```html
<!DOCTYPE html>
<html>
<head>
<title>Add and Select Custom XML Parts Example</title>
</head>
<body>
<h1>Add and Select Custom XML Parts 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, 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');
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();
// Loads the workbook which contains hidden external links
const wb = new Workbook(new Uint8Array(arrayBuffer));
// Some data in the form of byte array.
// Please use correct XML and Schema instead.
const btsData = new Uint8Array([1, 2, 3]);
const btsSchema = new Uint8Array([1, 2, 3]);
// Create four custom xml parts.
wb.customXmlParts.add(btsData, btsSchema);
wb.customXmlParts.add(btsData, btsSchema);
wb.customXmlParts.add(btsData, btsSchema);
wb.customXmlParts.add(btsData, btsSchema);
// Assign ids to custom xml parts.
wb.customXmlParts.get(0).id = "Fruit";
wb.customXmlParts.get(1).id = "Color";
wb.customXmlParts.get(2).id = "Sport";
wb.customXmlParts.get(3).id = "Shape";
// Specify search custom xml part id.
let srchID = "Fruit";
srchID = "Color";
srchID = "Sport";
// Search custom xml part by the search id.
const cxp = wb.customXmlParts.selectByID(srchID);
// Print the found or not found message on console and UI.
if (cxp.isNull()) {
console.log(`Not Found: CustomXmlPart ID ${srchID}`);
document.getElementById('result').innerHTML = `<p style="color: red;">Not Found: CustomXmlPart ID ${srchID}</p>`;
} else {
console.log(`Found: CustomXmlPart ID ${srchID}`);
document.getElementById('result').innerHTML = `<p style="color: green;">Found: CustomXmlPart ID ${srchID}</p>`;
}
// Save the modified workbook and provide download link
const outputData = wb.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
console.log("AddCustomXMLPartsAndSelectThemByID executed successfully.");
});
</script>
</html>
控制台输出
Found: CustomXmlPart ID Sport
