Shulou(Shulou.com)06/01 Report--

Web side shows the report when the query form how to achieve parameter linkage, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

The cascade query of multiple parameters in the query form on the web side is a common way of interaction between query controls. When the previous main parameters change, the linkage parameters also change. For example: the cities in the query form are linked according to the region, for example, if the region chooses North China, the latter cities can only choose the cities under North China.

1: if there are report tools that generally support the parameter cascade query function, then you can directly set the associated filter expression for the linkage parameters, which is simple and fast, for example: how to implement the parameter cascade query

2: if you do not use the report tool, you can embed the data report into the publishing page with iframe, and automatically modify the src property of iframe through the onChange () event of JavaScript.

Compared with the above two cases, the former has relatively low technical requirements for developers, simple mode of operation, and large order of magnitude, it can also be loaded asynchronously, and the performance is relatively high.

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