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查了那么多叽叽歪歪的资料：masterView的key，从表key和detailkey以及从表需要排序。

回到原点看随机help：

说重要的：

Grid Mode: Master-Detail

ExpressQuantumGrid provides a special data loading mode called grid mode, which loads only a fraction of the dataset records at a time, thus improving performance for huge datasets. This document describes how to set up a master-detail relationship between datasets in grid mode.
Note:   if you enable grid mode for a master/detail relationship, both Views must be in grid mode, else data will not be displayed correctly.
To represent a master-detail relationship between storages in ExpressQuantumGrid, you need to create a hierarchical structure of grid levels and Views similar to the one shown in the following image:

再说cxGrid主从表相关

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原文地址：https://www.cnblogs.com/usegear/p/11963514.html