Question

我按字段顺序排序：Check List

我有一个WrapperClass，它实现了Comparable接口：

public class CheckListWrapper implements Comparable
{
    public Boolean isChecked {get; set;}
    public String shortDescription {get; set;}
    public String fullDescription {get; set;}
    public Integer order {get; set;}
    public CheckList__c checkList;
    public CheckListItem__c checkListItem;

    public CheckListWrapper(CheckList__c chList)
    {
        shortDescription = chList.Short_Description__c;
        fullDescription = chList.Full_Description__c;
        order = (Integer)chList.Order__c;
        isChecked = false;
        checkList = chList;
    }

    public CheckListWrapper(CheckListItem__c chListItem)
    {
        shortDescription = chListItem.CheckList__r.Short_Description__c;
        fullDescription = chListItem.CheckList__r.Full_Description__c;
        order = (Integer)chListItem.CheckList__r.Order__c;
        isChecked = true;
        checkListItem = chListItem;
    }

    public Integer compareTo(Object compareTo)
    {
        CheckListWrapper compareToCheckList = (CheckListWrapper)compareTo;
        Integer returnValue = 0;
        if (checkList != null)
        {
            if (checkList.Order__c > compareToCheckList.checkList.Order__c)
            {
                returnValue = 1;
            } else if (checkList.Order__c < compareToCheckList.checkList.Order__c)
            {
                returnValue = -1;
            }
        } else if (checkListItem != null)
        {
            if (checkListItem.CheckList__r.Order__c > compareToCheckList.checkListItem.CheckList__r.Order__c)
            {
                returnValue = 1;
            } else if (checkListItem.CheckList__r.Order__c < compareToCheckList.checkListItem.CheckList__r.Order__c)
            {
                returnValue = -1;
            }
        }

        return returnValue;
    }
}

界面可比较有效，但所有选中的复选框都高于未选中状态。问题是为什么选中复选框高于未选中状态以及如何避免它？

Answer 1

好。我明白了我的错误：一切都没问题，但是我应该使用一个块，如果在方法compareTo中没有，也不要通过Object CheckList__c引用字段Order__c。我应该使用＆＃34; order＆＃34;来自CheckListWrapper的变量：

public Integer compareTo(Object compareTo)
    {
        CheckListWrapper compareToCheckList = (CheckListWrapper)compareTo;
        Integer returnValue = 0;
        if (order > compareToCheckList.order)
        {
            returnValue = 1;
        } else if (order < compareToCheckList.order)
        {
            returnValue = -1;
        }

        return returnValue;
    }

为什么在visualforce表中选中高于未选中的复选框

1 个答案: