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本主题通过使用案例场景解释在SpreadJS中创建数据透视表,如下所述。
假设有一家食品销售公司在不同国家/地区销售食品和饮料产品。公司每天维护产品的销售数据。通过使用这些数据,可以创建一个数据透视表,它可以提供有意义的见解,例如:
数据透视表可以轻松地对销售数据进行分类并自动计算小计和总计。要创建数据透视表,请按照以下步骤操作:
以下示例代码创建数据透视表并将字段添加到字段区域。
$(document).ready(function () {
// 初始化Spread
var spread = new GC.Spread.Sheets.Workbook(document.getElementById('ss'), { sheetCount: 2 });
spread.suspendPaint();
// 获取sheet
var pivotLayoutSheet = spread.getSheet(0);
var dataSourceSheet = spread.getSheet(1);
// 设置工作表名称
pivotLayoutSheet.name("PivotLayout");
dataSourceSheet.name("DataSource");
// 设置行数
dataSourceSheet.setRowCount(245);
// 设置数据源
dataSourceSheet.setArray(0, 0, pivotDB_UseCase);
// 将table添加到 dataSourceSheet
dataSourceSheet.tables.add('tableSales', 0, 0, 245, 8);
spread.resumePaint();
// 初始化数据透视表
initPivotTable(pivotLayoutSheet);
// sheet中自适应列
autoFit(pivotLayoutSheet);
autoFit(dataSourceSheet);
});
function initPivotTable(sheet) {
// 添加数据透视表
var myPivotTable = sheet.pivotTables.add("myPivotTable", "tableSales", 0, 0, GC.Spread.Pivot.PivotTableLayoutType.tabular, GC.Spread.Pivot.PivotTableThemes.dark3);
myPivotTable.suspendLayout();
// 显示数据透视表的 rowHeader 和 columnHeader
myPivotTable.options.showRowHeader = true;
myPivotTable.options.showColumnHeader = true;
// 添加列字段
myPivotTable.add("Category", "Category", GC.Spread.Pivot.PivotTableFieldType.columnField);
myPivotTable.add("Product", "Product", GC.Spread.Pivot.PivotTableFieldType.columnField);
// 添加行字段
myPivotTable.add("Region", "Region", GC.Spread.Pivot.PivotTableFieldType.rowField);
myPivotTable.add("City", "City", GC.Spread.Pivot.PivotTableFieldType.rowField);
// 添加 SubtotalType Sum字段
myPivotTable.add("Quantity", "Sum of quantity", GC.Spread.Pivot.PivotTableFieldType.valueField, GC.Pivot.SubtotalType.sum);
// 添加筛选字段
myPivotTable.add("OrderDate", "OrderDate", GC.Spread.Pivot.PivotTableFieldType.filterField);
myPivotTable.resumeLayout();
return myPivotTable;
}
function autoFit(sheet) {
// 自适应列宽
let columnCount = sheet.getColumnCount();
for (let i = 0; i < columnCount; i++) {
sheet.autoFitColumn(i);
}
}
数据透视表还可以使用来自数据源的数据来呈现以下见解: