javascript 如何在primefaces中的ajax调用后不关闭组件的情况下更新p：selectCheckboxMenu的标签？
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How to update the label of p:selectCheckboxMenu without the component being closed after ajax call in primefaces?
提问by Sri Harsha
There is one problem occurring when I am trying to dynamically generate the label from the backing bean. The problem is that the dropdown that appears vanishes for each selection but the label is updated properly. Is there a workaround for this?
当我尝试从支持 bean 动态生成标签时，会出现一个问题。问题是每个选择出现的下拉列表都会消失，但标签会正确更新。有解决方法吗？
<p:selectCheckboxMenu value="#{formBean.selectedMovies}" label="#{formBean.moviesLabel}" id="Movies" >
<f:selectItems value="#{formBean.movies}" ></f:selectItems>
<p:ajax update="Movies" listener="#{formBean.populateLabel}"></p:ajax>
</p:selectCheckboxMenu>
and
和
//Backing bean
public void populateLabel() {
/* Populating the label with the selected options */
moviesLabel = new String("");
if (selectedMovies.size() == 0) {
moviesLabel = "Select";
} else {
for (int i = 0; i < selectedMovies.size(); i++) {
if (moviesLabel.length() == 0) {
moviesLabel = selectedMovies.get(i);
} else {
moviesLabel = moviesLabel + "," + selectedMovies.get(i);
}
}
}
}
回答by Daniel
Here is how
这是如何
add widgetVar="someVarName"to your p:selectCheckboxMenu
添加widgetVar="someVarName"到您的p:selectCheckboxMenu
and modify your p:"ajaxby adding oncomplete="someVarName.show()"
并p:"ajax通过添加修改您的oncomplete="someVarName.show()"
complete code :
完整代码：
<p:selectCheckboxMenu widgetVar="someVarName" value="#{usersManagmentPage.selectedMovies}"
label="#{usersManagmentPage.moviesLabel}" id="Movies" >
<f:selectItems value="#{usersManagmentPage.movies}" ></f:selectItems>
<p:ajax oncomplete="someVarName.show()" listener="#{usersManagmentPage.populateLabel}" update="Movies" ></p:ajax>
</p:selectCheckboxMenu>
In latest PrimeFacesyou should use oncomplete="PF('someVarName').show()"instead of oncomplete="someVarName.show()"
在最新的 PrimeFaces 中，您应该使用oncomplete="PF('someVarName').show()"而不是oncomplete="someVarName.show()"
