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通过 Aspose.Cells for JavaScript via C++ 管理数据透视表的值字段
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将字段添加到数据区域
将基本字段添加到数据（值）区域，是确定数据透视表如何聚合源数据的第一步。Aspose.Cells for JavaScript via C++ 提供了 pivotTable.addFieldToArea(PivotFieldType.Data, "ColumnName") 重载，该重载接受常量 PivotFieldType.Data 和源列名称。字段添加到数据区域后，可通过 pivotTable.getDataFields() 集合访问该字段，集合中的字段顺序与添加顺序一致。默认情况下，数值型源列使用 ConsolidationFunction.Sum 进行汇总，而非数值型列默认使用 Count 进行汇总。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells Example</h1>
<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 workbook = new Workbook();
const worksheet = workbook.worksheets.get(0);
worksheet.name = "Data";
const headers = ["Category", "Item", "Year", "Amount"];
for (let j = 0; j < headers.length; j++) {
worksheet.cells.get(0, j).value = headers[j];
}
const data = [
["Fruit", "Apple", 2020, 100],
["Fruit", "Apple", 2021, 150],
["Fruit", "Banana", 2020, 80],
["Fruit", "Banana", 2021, 90],
["Vegetable", "Carrot", 2020, 50],
["Vegetable", "Carrot", 2021, 60],
["Vegetable", "Daikon", 2020, 40],
["Vegetable", "Daikon", 2021, 45]
];
for (let i = 0; i < data.length; i++) {
for (let j = 0; j < data[i].length; j++) {
worksheet.cells.get(i + 1, j).value = data[i][j];
}
}
const pivotTable = worksheet.pivotTables.add("=A1:D9", 2, 5);
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Row, "Category");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Row, "Item");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Column, "Year");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Data, "Amount");
pivotTable.calculateData();
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = "output_drag.xlsx";
downloadLink.style.display = "block";
document.getElementById('result').innerHTML =
'<p style="color: green;">Done! Click the download link to get the result file.</p>';
});
</script>
</html>
更改汇总函数
字段位于数据区域后，Aspose.Cells 会在 pivotTable.getDataFields() 返回的 PivotField 对象中公开该字段。每个 PivotField 都有一个类型为 ConsolidationFunction 的可写 function 属性，该属性控制应用于该字段基础值的聚合方式。ConsolidationFunction 是一个枚举，包含以下成员：Sum、Count、Average、Max、Min、Product、StdDev、StdDevp、Var 和 Varp。前六个成员涵盖绝大多数实际使用场景，后四个成员则是适用于方差分析的统计聚合函数。
更改
function 仅影响聚合方式；源列和数据透视表的行/列结构不会发生变化。要更改现有数据字段的聚合方式，请调用 pivotTable.getDataFields()[i].setFunction(ConsolidationFunction.X)，然后调用 pivotTable.calculateData() 以重新呈现数据透视表。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells Example</h1>
<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 } = AsposeCells;
const initialization = 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 () => {
await initialization;
const workbook = new Workbook();
const worksheet = workbook.worksheets.get(0);
worksheet.name = "Data";
const headers = ["Category", "Item", "Year", "Amount"];
for (let j = 0; j < headers.length; j++) {
worksheet.cells.get(0, j).value = headers[j];
}
const data = [
["Fruit", "Apple", 2020, 100],
["Fruit", "Apple", 2021, 150],
["Fruit", "Banana", 2020, 80],
["Fruit", "Banana", 2021, 90],
["Vegetable", "Carrot", 2020, 50],
["Vegetable", "Carrot", 2021, 60],
["Vegetable", "Daikon", 2020, 40],
["Vegetable", "Daikon", 2021, 45]
];
for (let i = 0; i < data.length; i++) {
for (let j = 0; j < data[i].length; j++) {
worksheet.cells.get(i + 1, j).value = data[i][j];
}
}
const pivotTable = worksheet.pivotTables.add("=A1:D9", 2, 5);
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Row, "Category");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Row, "Item");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Column, "Year");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Data, "Amount");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Data, "Amount");
const countField = pivotTable.dataFields.get(1);
countField.function = AsposeCells.ConsolidationFunction.Count;
pivotTable.calculateData();
const outputData = workbook.save(AsposeCells.SaveFormat.Xlsx);
const blob = new Blob([outputData]);
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = "output_function.xlsx";
downloadLink.style.display = "block";
document.getElementById('result').innerHTML = '<p style="color: green;">Done! Click the download link to get the result file.</p>';
});
</script>
</html>
将值字段绘制到行轴或列轴
当数据透视表包含两个或多个数据字段时，Aspose.Cells 会提供另一个名为 pivotTable.getValuesField() 的虚拟字段。该虚拟字段表示数据区域中所有数据字段的聚合结果。可以将其作为基本数据透视字段拖入行区域或列区域，从而并排布置多个度量值。
如果没有值字段或只有一个值字段，
pivotTable.getValuesField() 返回的虚拟值字段将不起作用。
<!DOCTYPE html>
<html>
<head>
<title>Aspose.Cells Example</title>
</head>
<body>
<h1>Aspose.Cells Example</h1>
<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 workbook = new Workbook();
const worksheet = workbook.worksheets.get(0);
worksheet.name = "Data";
const cells = worksheet.cells;
const headers = ["Category", "Item", "Year", "Amount"];
for (let j = 0; j < headers.length; j++) {
cells.get(0, j).value = headers[j];
}
const data = [
["Fruit", "Apple", 2020, 100],
["Fruit", "Apple", 2021, 150],
["Fruit", "Banana", 2020, 80],
["Fruit", "Banana", 2021, 90],
["Vegetable", "Carrot", 2020, 50],
["Vegetable", "Carrot", 2021, 60],
["Vegetable", "Daikon", 2020, 40],
["Vegetable", "Daikon", 2021, 45]
];
for (let i = 0; i < data.length; i++) {
for (let j = 0; j < data[i].length; j++) {
cells.get(i + 1, j).value = data[i][j];
}
}
const pivotTable = worksheet.pivotTables.add("=A1:D9", 2, 5);
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Row, "Category");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Row, "Item");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Column, "Year");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Data, "Amount");
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Data, "Amount");
pivotTable.dataFields.get(1).function = AsposeCells.ConsolidationFunction.Count;
pivotTable.addFieldToArea(AsposeCells.PivotFieldType.Column, pivotTable.valuesField.name);
pivotTable.calculateData();
const outputData = workbook.save(SaveFormat.Xlsx);
const blob = new Blob([outputData], {
type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
});
const downloadLink = document.getElementById('downloadLink');
downloadLink.href = URL.createObjectURL(blob);
downloadLink.download = "output_plot.xlsx";
downloadLink.style.display = "block";
document.getElementById('result').innerHTML = '<p style="color: green;">Done! Click the download link to get the result file.</p>';
});
</script>
</html>