使用JavaScript通过C++创建和管理Microsoft Excel文件中的表格
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创建表
电子表格的优点之一是它们允许您创建不同类型的列表，例如电话列表、任务列表、交易列表、资产或负债列表。多个用户可以共同使用、创建和维护各种列表。
Aspose.Cells支持创建和管理列表。
列表对象的优点
当您将数据列表转换为实际列表对象时，会有相当多的优点
- 新行和列会自动包括在内。
- 列表底部可以轻松添加总计行来显示求和、平均、计数等信息。
- 添加在右侧的列会自动并入列表对象中。
- 基于行和列的图表会自动扩展。
- 分配给行和列的命名范围将自动扩展。 列表受到意外行和列删除的保护。
在 Microsoft Excel 中创建列表对象
- 选择用于创建列表对象的数据范围
- 这将显示创建列表对话框。
- 实现数据的列表对象并指定汇总行（选择 数据，然后 列表，接着 总行）。
使用 Aspose.Cells API
Aspose.Cells 提供了代表 Microsoft Excel 文件的 Workbook 类。 Workbook 类包含一个 worksheets 集合，允许访问 Excel 文件中的每个工作表。
工作表由 {0} 类表示。{1} 类提供了管理工作表的丰富属性和方法。要在工作表中创建 {2}，使用 {3} 集合属性来自 {4} 类。每个 {5} 实际上是 {6} 类的对象，它还提供用于添加列表对象和指定范围的 {7} 方法。根据指定的单元格范围，Aspose.Cells 会在工作表中创建 {8}，使用 {9} 属性格式化表格以满足您的需求。
在下例中，我们在工作表中添加示例数据，添加一个 showTotals 并应用默认样式。 listColumns 样式受到 Microsoft Excel 2007/2010 的支持。
在下面的示例中，我们使用Aspose.Cells API创建了与上节Microsoft Excel中相同的ListObject。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells ListObjects Example</title>
</head>
<body>
<h1>ListObjects 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, TotalsCalculation } = 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();
const workbook = new Workbook(new Uint8Array(arrayBuffer));
const listObjects = workbook.worksheets.get(0).listObjects;
listObjects.add(1, 1, 7, 5, true);
const firstList = listObjects.get(0);
firstList.showTotals = true;
firstList.listColumns.get(4).totalsCalculation = TotalsCalculation.Sum;
const outputData = workbook.save(SaveFormat.Excel97To2003);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = 'output.xls';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Modified Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">List created and totals calculated successfully! Click the download link to get the modified file.</p>';
});
</script>
</html>
格式化表
要管理和分析一组相关数据，可以将一系列单元格转换为列表对象（也称为Excel表格）。 表格是包含相关数据的一系列行和列，独立于其他行和列中的数据。 默认情况下，表中的每一列都在标题行中启用了过滤器，这样您就可以快速过滤或排序列表对象数据。 您可以向列表对象添加一个总行（列表中的特殊行，为使用数字数据工作提供了一系列有用的聚合函数）。 Aspose.Cells提供了创建和管理列表（或表格）的选项。
格式化列表对象
Aspose.Cells 提供了代表 Microsoft Excel 文件的 Workbook 类。 Workbook 类包含一个 worksheets 集合，允许访问 Excel 文件中的每个工作表。
工作表由Worksheet类表示。Worksheet类提供了管理工作表的各种属性和方法。要在工作表中创建ListObject，使用Worksheet类的listObjects集合属性。每个ListObject实际上是ListObjectCollection类的对象，进而提供add(number, number, number, number, boolean)方法以添加列表对象并指定其涵盖的单元格范围。根据指定的范围，Aspose.Cells会在工作表中创建ListObject。使用TableStyleType（例如ListObject类的属性来格式化表格以满足您的需求。
下例为工作表添加示例数据，添加一个ListObject并应用默认样式。ListObject样式支持Microsoft Excel 2007/2010。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells ListObject 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 () => {
// This example does not require an input file; it creates a new workbook
const workbook = new Workbook();
// Obtaining the reference of the default(first) worksheet
const sheet = workbook.worksheets.get(0);
// Obtaining Worksheet's cells collection
const cells = sheet.cells;
// Setting the value to the cells (converted putValue -> value)
cells.get(1, 1).value = "Employee";
cells.get(1, 2).value = "Quarter";
cells.get(1, 3).value = "Product";
cells.get(1, 4).value = "Continent";
cells.get(1, 5).value = "Country";
cells.get(1, 6).value = "Sale";
cells.get(2, 1).value = "David";
cells.get(3, 1).value = "David";
cells.get(4, 1).value = "David";
cells.get(5, 1).value = "David";
cells.get(6, 1).value = "James";
cells.get(7, 1).value = "James";
cells.get(8, 1).value = "James";
cells.get(9, 1).value = "James";
cells.get(10, 1).value = "James";
cells.get(11, 1).value = "Miya";
cells.get(12, 1).value = "Miya";
cells.get(13, 1).value = "Miya";
cells.get(14, 1).value = "Miya";
cells.get(15, 1).value = "Miya";
cells.get(2, 2).value = 1;
cells.get(3, 2).value = 2;
cells.get(4, 2).value = 3;
cells.get(5, 2).value = 4;
cells.get(6, 2).value = 1;
cells.get(7, 2).value = 2;
cells.get(8, 2).value = 3;
cells.get(9, 2).value = 4;
cells.get(10, 2).value = 4;
cells.get(11, 2).value = 1;
cells.get(12, 2).value = 1;
cells.get(13, 2).value = 2;
cells.get(14, 2).value = 2;
cells.get(15, 2).value = 2;
cells.get(2, 3).value = "Maxilaku";
cells.get(3, 3).value = "Maxilaku";
cells.get(4, 3).value = "Chai";
cells.get(5, 3).value = "Maxilaku";
cells.get(6, 3).value = "Chang";
cells.get(7, 3).value = "Chang";
cells.get(8, 3).value = "Chang";
cells.get(9, 3).value = "Chang";
cells.get(10, 3).value = "Chang";
cells.get(11, 3).value = "Geitost";
cells.get(12, 3).value = "Chai";
cells.get(13, 3).value = "Geitost";
cells.get(14, 3).value = "Geitost";
cells.get(15, 3).value = "Geitost";
cells.get(2, 4).value = "Asia";
cells.get(3, 4).value = "Asia";
cells.get(4, 4).value = "Asia";
cells.get(5, 4).value = "Asia";
cells.get(6, 4).value = "Europe";
cells.get(7, 4).value = "Europe";
cells.get(8, 4).value = "Europe";
cells.get(9, 4).value = "Europe";
cells.get(10, 4).value = "Europe";
cells.get(11, 4).value = "America";
cells.get(12, 4).value = "America";
cells.get(13, 4).value = "America";
cells.get(14, 4).value = "America";
cells.get(15, 4).value = "America";
cells.get(2, 5).value = "China";
cells.get(3, 5).value = "India";
cells.get(4, 5).value = "Korea";
cells.get(5, 5).value = "India";
cells.get(6, 5).value = "France";
cells.get(7, 5).value = "France";
cells.get(8, 5).value = "Germany";
cells.get(9, 5).value = "Italy";
cells.get(10, 5).value = "France";
cells.get(11, 5).value = "U.S.";
cells.get(12, 5).value = "U.S.";
cells.get(13, 5).value = "Brazil";
cells.get(14, 5).value = "U.S.";
cells.get(15, 5).value = "U.S.";
cells.get(2, 6).value = 2000;
cells.get(3, 6).value = 500;
cells.get(4, 6).value = 1200;
cells.get(5, 6).value = 1500;
cells.get(6, 6).value = 500;
cells.get(7, 6).value = 1500;
cells.get(8, 6).value = 800;
cells.get(9, 6).value = 900;
cells.get(10, 6).value = 500;
cells.get(11, 6).value = 1600;
cells.get(12, 6).value = 600;
cells.get(13, 6).value = 2000;
cells.get(14, 6).value = 500;
cells.get(15, 6).value = 900;
// Adding a new List Object to the worksheet
const index = sheet.listObjects.add("A1", "F15", true);
const listObject = sheet.listObjects.get(index);
// Adding Default Style to the table (converted setter -> property)
listObject.tableStyleType = AsposeCells.TableStyleType.TableStyleMedium10;
// Show Total
listObject.showTotals = true;
// Set the Quarter field's calculation type (converted getter/setter -> property)
listObject.listColumns.get(1).totalsCalculation = AsposeCells.TotalsCalculation.Count;
// Saving the 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 = 'output.xlsx';
downloadLink.style.display = 'block';
downloadLink.textContent = 'Download Excel File';
document.getElementById('result').innerHTML = '<p style="color: green;">Workbook created and table added successfully! Click the download link to get the file.</p>';
});
</script>
</html>