TDBGrid状态栏用于列聚合 [英] TDBGrid status bar for column aggregate

问题描述

得到了一个包含一些数字列的网格，并且需要为每个列实现汇总(总和或计数)并将其显示在相应的列下.

Got a grid with some numeric columns and it's need to implement for each column an aggregate (sum or count) and display it under the corresponding column.

我知道某些套件(DevExpress或其他套件)已经默认"实现.但是有一种方法可以使用默认控件或JVCL来实现?

I know that some suites (DevExpress or other) had already implemented "by default". But there is a way to implement that using default controls or JVCL?

推荐答案

自从您提到 JEDI VCL ，请尝试查看 TJvDBGridFooter 组件.它是 TJvDBGrid 控件的状态栏.

Since you have mentioned JEDI VCL, try to take a look at the TJvDBGridFooter component. It is the status bar for the TJvDBGrid control.

• 您可以在 OnDisplayText 中修改显示的文本事件
• 您可以在 OnCalculate 中计算聚合字段事件
• 您可以跟随网格列滚动，调整面板大小或修改面板的外观

• you can modify the displayed text in the OnDisplayText event
• you can calculate the aggregate fields in the OnCalculate event
• you can follow the grid column scroll, resize or modify the appearence of the panels

从JVCL的 .. \ examples \ JvUltimDBGrid 文件夹中检查演示项目，以查看其运行情况.

Check the demo projects from JVCL's ..\examples\JvUltimDBGrid folder to see it in action.

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