[Salesforce] Sorting of SelectOption list

最新推荐文章于 2019-04-25 15:27:32 发布

原创最新推荐文章于 2019-04-25 15:27:32 发布 · 640 阅读

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本文介绍了一种针对SelectOption列表的排序方法，通过创建一个SelectOptionUtil类来实现灵活的排序逻辑，支持按Label或Value进行排序。

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As we know, the sorting method for SelectOption list is that sort the value first and then Label. Usually we need sort by label only or value. So here we have a workaround for this.

Solution:

We should have a SelectOptionUtil class for the sorting.

    global enum FieldToSort {
        Label, Value
    }
    
    global static void doSort(List<Selectoption> opts, FieldToSort sortField) {
        Map<String, Selectoption> mapping = new Map<String, Selectoption>();
        Integer suffix = 1;
        for (Selectoption opt : opts) {
            if (sortField == FieldToSort.Label) {
                    mapping.put((opt.getLabel() + suffix++), opt);   
            } else {             
                    mapping.put((opt.getValue() + suffix++),opt);
            }
        }
        
        List<String> sortKeys = new List<String>();
        sortKeys.addAll(mapping.keySet());
       
        sortKeys.sort();
        opts.clear();
        for (String key : sortKeys) {
            opts.add(mapping.get(key));
        }
    }