[英]How to get the item ID in vaadin
Good day everyone! 今天是个好日子! I have a HierarchicalContainer below: 我在下面有一个HierarchicalContainer:
contFinalGrade= new HierarchicalContainer();
contFinalGrade.addContainerProperty("index", Integer.class, 0);
contFinalGrade.addContainerProperty("subCode", String.class, "");
contFinalGrade.addContainerProperty("courseId", String.class, "");
contFinalGrade.addContainerProperty("parentCourseId", String.class, "");
contFinalGrade.addContainerProperty("subName", String.class, "");
contFinalGrade.addContainerProperty("term", String.class, "");
contFinalGrade.addContainerProperty("studyPoints", BigDecimal.class, null);
contFinalGrade.addContainerProperty("grade", String.class, "");
and I add items by using the code below: 然后使用以下代码添加项目:
Item newItem = contFinalGrade.getItem(contFinalGrade.addItem());
I'm wondering how to get the itemId using parentCourseId. 我想知道如何使用parentCourseId获取itemId。 I need to get it because I need to set the parent of some items. 我需要获取它,因为我需要设置某些项的父项。 Thanks! 谢谢!
Maybe this is what you are looking for: 也许这就是您想要的:
List<Object> id = new ArrayList<Object>();
List<Item> newItem=new ArrayList<Item>();
//Do this on a button click or something maybe
id.add(contFinalGrade.addItem());
//Create Items with those ids and get your property
for(int i=0;i<id.size();i++){
newItem.add(contFinalGrade.getItem(id.get(i)));
newItem.get(i).getItemProperty("parentCourseId");
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