How to change background in comment in Excel with JavaScript via C++
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Comments are added to cells to record comments, anything from the details of how a formula is worked, where a value comes from or questions from reviewers. Comments play an extremely important role when multiple people discuss or review the same document at different times. How to distinguish different people’s comments? Yes, we can set a different background color for each comment. But when we need to process a lot of documents and a lot of comments, doing it manually is a disaster. Fortunately Aspose.Cells provides an API that allows you to do this in code.
How to change color in comment in Excel
When you don’t need the default background color for comments, you may want to replace it with a color you’re interested in. How do I change the background color of the Comments box in Excel?
The following code will guide you how to use Aspose.Cells to add your favorite background color to comments of your own choice.
Here we have prepared a sample file for you. This file is used to initialize the Workbook object in the code below.
<!DOCTYPE html>
<html>
<head>
<title>Change Comment Background Color Example</title>
</head>
<body>
<h1>Change Comment Background Color 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();
// Initialize a new workbook from the uploaded file
const workbook = new Workbook(new Uint8Array(arrayBuffer));
// Accessing the newly added comment
const comment = workbook.worksheets.get(0).comments.get(0);
// change background color
const shape = comment.commentShape;
shape.fill.solidFill.color = AsposeCells.Color.Red;
// Saving the modified 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 = 'result.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Comment background color changed successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
Execute the above code and you will get an output file.
How to insert picture or image in comment in Excel
Microsoft Excel lets users customize the look and feel of spreadsheets to a great extent. It is even possible to add background pictures to comments. Adding a background image can be an aesthetic choice or be used to strengthen branding.
The sample code below creates an XLSX file from scratch using Aspose.Cells API, and adds a comment with a picture background to cell A1.
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells - Add Comment with Picture Example</h1>
<p>
Select an existing Excel file (optional) and an image file to attach to a comment in cell A1.
</p>
<input type="file" id="fileInput" accept=".xls,.xlsx,.csv" />
<br/><br/>
<label for="imageInput">Select image to insert in comment (required):</label>
<input type="file" id="imageInput" accept="image/*" />
<br/><br/>
<button id="runExample">Run Example</button>
<a id="downloadLink" style="display: none;">Download Result</a>
<div id="result"></div>
<script src="aspose.cells.js.min.js"></script>
<script type="text/javascript">
const { Workbook, SaveFormat, Worksheet, Cell } = 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 imageInput = document.getElementById('imageInput');
const resultDiv = document.getElementById('result');
if (!imageInput.files.length) {
resultDiv.innerHTML = '<p style="color: red;">Please select an image file to insert into the comment.</p>';
return;
}
// Instantiate or load Workbook
let workbook;
if (fileInput.files.length) {
const file = fileInput.files[0];
const arrayBuffer = await file.arrayBuffer();
workbook = new Workbook(new Uint8Array(arrayBuffer));
} else {
workbook = new Workbook();
}
// Access the first worksheet
const worksheet = workbook.worksheets.get(0);
// Get comments collection for the first sheet
const comments = worksheet.comments;
// Add a comment to cell A1 (row 0, column 0)
const commentIndex = comments.add(0, 0);
const comment = comments.get(commentIndex);
// Set comment text and font name (converted from setters to properties)
comment.note = "First note.";
comment.font.name = "Times New Roman";
// Load the selected image file and set it to the comment's shape fill imageData
const imageFile = imageInput.files[0];
const imgArrayBuffer = await imageFile.arrayBuffer();
const imageData = new Uint8Array(imgArrayBuffer);
comment.commentShape.fill.imageData = imageData;
// Save the workbook to a blob and provide a 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 = 'commentwithpicture1.out.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
resultDiv.innerHTML = '<p style="color: green;">Comment with picture added successfully! Click the download link to get the modified file.</p>';
});
</script>
</body>
</html>