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本文旨在为您简述在Wyn中为什么要进行数据绑定和数据处理,希望对您接下来的学习有所帮助。
仪表板的所有可视化效果都是基于数据的,只有基于数据的展示才有意义。
我们将可视化组件拖拽到编辑区时,这些组件还没有数据支撑,仅是一个虚拟化的示例效果,就像下图这样。
只有为组件绑定数据后,它们才有活力和意义。那么数据从哪来呢?答案就是数据集或数据模型。
那么怎样才能将数据集或数据模型中的数据传递到组件中呢?这里我们需要两步操作。
第1步: 首先需要将数据集或数据模型添加到仪表板中,下面这张图就是将数据集加到仪表板中后的效果。
第2步: 接下来为组件绑定数据,使组件进行数据绘制。这样也就完成了数据绑定的过程。
另外,为了使组件最终展示的数据更符合实际场景的需求,我们经常需要对已经添加或绑定到仪表板中的数据字段进行再加工,如进行数据运算、修改数据格式、重命名等,这也就是我们说的前端数据处理。
例如,下图中我们就对订单金额进行了取平均数的运算,这样一来组件中就显示了各大区的平均销售额。
以上就为您介绍完了数据绑定和数据处理的概念和意义,而在系统中,能做的远非如此。
接下来,让我们一起继续探索吧!