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在报表模板中,上下文(Context)是一个非常重要的概念。它默认为所有子单元格筛选数据,并且还会影响报表布局,因为所有子单元格都会随着上下文单元格重复。要在模板单元格中设置上下文,可以在setTemplateCell
方法中使用contextproperty
。
单个单元格可以有两个上下文:垂直上下文和水平上下文。然而,如果一个单元格同时具有垂直上下文和水平上下文,它将成为一个交叉单元格,并用于生成交叉报表。
根据上下文值,模板单元格的行为可能会有所不同。
上下文选项 | 值 | 结果 |
---|---|---|
水平 | None | 表示模板单元格没有水平上下文 |
单元格名称 | 使用该单元格作为水平上下文 | |
默认/未定义 | 使用顶部的水平扩展单元格作为其水平上下文 | |
垂直 | None | 表示模板单元格没有垂直上下文 |
单元格名称 | 使用该单元格作为垂直上下文 | |
默认/未定义 | 使用左侧的垂直扩展单元作为其垂直上下文 |
注意:如果单元格的水平和垂直上下文值都设置为
Default
,并且找不到垂直上下文的左侧或水平上下文的上方,则单元格使用树范围根节点作为其垂直或水平上下文。
在报表模板中设置上下文的步骤:
在 DataManager 中定义表格源。
在模板单元格中配置类型和绑定选项。
在模板单元格中设置contextproperty
值。
你可以使用以下代码示例来为单元格设置垂直和水平上下文。
// Set vertical context as a custom cell.
templateSheet.setTemplateCell(1, 1, {
type: 'Group',
binding: `Orders[customerId]`,
context: {
vertical: 'A1',
},
});
// Set vertical context as none.
templateSheet.setTemplateCell(1, 1, {
type: 'Group',
binding: `Orders[customerId]`,
context: {
vertical: 'None',
},
});
// Set horizontal context as a custom cell.
templateSheet.setTemplateCell(1, 1, {
type: 'Group',
binding: `Orders[customerId]`,
spillDirection: 'Horizontal',
context: {
horizontal: 'A1',
},
});
// Set horizontal context as a none.
templateSheet.setTemplateCell(1, 1, {
type: 'Group',
binding: `Orders[customerId]`,
spillDirection: 'Horizontal',
context: {
horizontal: 'None',
},
});
// Set both vertical and horizontal context for a cell.
templateSheet.setTemplateCell(1, 1, {
type: 'Summary',
aggregate: 'Sum',
binding: `Sales[Sales]`,
context: {
vertical: 'A2',
horizontal: 'B1',
},
});