管理评论和注释

介绍

注释用于向单元格添加附加信息。 Aspose.Cells 提供了两种向单元格添加注释的方法。第一种是在设计器文件中手动创建注释。然后使用Aspose.Cells导入这些评论。第二个是在运行时使用Aspose.Cells API添加评论。本主题讨论使用 Aspose.Cells API 向单元格添加注释。还将解释格式化注释。

添加评论

通过调用注释收藏的添加方法（封装在工作表目的）。新的评论对象可以从注释通过传递评论索引进行收集。访问后评论对象，使用评论对象的笔记财产。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java
// The path to the documents directory.
String dataDir = "";

// Create directory if it is not already present.
File file = new File(dataDir);
if(!file.exists())
	file.mkdir();

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.getWorksheets().add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.getWorksheets().get(sheetIndex);

// Adding a comment to "F5" cell
int commentIndex = worksheet.getComments().add("F5");

// Accessing the newly added comment
com.aspose.cells.Comment comment = worksheet.getComments().get(commentIndex);

// Setting the comment note
comment.setNote( "Hello Aspose!");

// Saving the Excel file
workbook.save(dataDir + "book1.out.xls");

评论格式

还可以通过配置评论的高度、宽度和字体设置来格式化评论的外观。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java
// The path to the documents directory.
String dataDir = "";

// Create directory if it is not already present.
File file = new File(dataDir);
if(!file.exists())
	file.mkdir();

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Adding a new worksheet to the Workbook object
int sheetIndex = workbook.getWorksheets().add();

// Obtaining the reference of the newly added worksheet by passing its sheet index
Worksheet worksheet = workbook.getWorksheets().get(sheetIndex);

// Adding a comment to "F5" cell
int commentIndex = worksheet.getComments().add("F5");

// Accessing the newly added comment
com.aspose.cells.Comment comment = worksheet.getComments().get(commentIndex);

// Setting the comment note
comment.setNote( "Hello Aspose!");

// Setting the font size of a comment to 14
comment.getFont().setSize(14);

// Setting the font of a comment to bold
comment.getFont().setBold(true);

// Setting the height of the font to 10
comment.setHeightCM(10);

// Setting the width of the font to 2
comment.setWidthCM(2);
    	
// Saving the Excel file
workbook.save(dataDir + "book1.out.xls");

添加图像以评论

使用 Microsoft Excel 2007，还可以将图像作为单元格注释的背景。在 Excel 2007 中，这是通过执行以下步骤完成的。 （他们假设您已经添加了单元格评论。）

1. 右键单击包含注释的单元格。
2. 选择显示/隐藏评论, 并清除评论中的任何文本。
3. 单击评论的边框以将其选中。
4. 选择格式， 然后评论.
5. 在颜色和线条选项卡，展开颜色列表。
6. 点击填充效果.
7. 在图片选项卡，单击选择图片.
8. 找到并选择图片。
9. 点击好的直到所有对话框都关闭。

Aspose.Cells也提供了这个功能。下面是一个代码示例，它从头开始创建一个 XLSX 文件，向单元格“A1”添加注释，并将图片集作为其背景。

// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-Java
// The path to the documents directory.
String dataDir = "";

// Create directory if it is not already present.
File file = new File(dataDir);
if(!file.exists())
	file.mkdir();

// Instantiating a Workbook object
Workbook workbook = new Workbook();

// Get a reference of comments collection with the first sheet
com.aspose.cells.CommentCollection comments = workbook.getWorksheets().get(0).getComments();

// Add a comment to cell A1
int commentIndex = comments.add(0, 0);
com.aspose.cells.Comment comment = comments.get(commentIndex);
comment.setNote("First note.");
comment.getFont().setName("Times New Roman");

// Load an image
String filename = dataDir + "image.jpg";
byte[] result = null;
java.nio.channels.FileChannel  fc = null;
try {
	    fc = new java.io.RandomAccessFile(filename, "r").getChannel();
	    java.nio.MappedByteBuffer byteBuffer = fc.map(java.nio.channels.FileChannel.MapMode.READ_ONLY, 0,
	            fc.size()).load();
	    System.out.println(byteBuffer.isLoaded());
	    result = new byte[(int) fc.size()];
	    if (byteBuffer.remaining() > 0) {
	        byteBuffer.get(result, 0, byteBuffer.remaining());
    }
} catch (IOException e) {
      throw e;
} finally {
      try {
          fc.close();
      } catch (IOException e) {
    	    throw e;
      }
}
// Set image data to the shape associated with the comment
comment.getCommentShape().getFill().setImageData(result);

// Saving the Excel file
workbook.save(dataDir + "book1.out.xlsx");

推进主题

• 更改评论的文本方向
• 如何更改评论字体颜色
• 如何设置评论背景
• 线程评论