如何更新p的标签:在primefaces中ajax调用后，在不关闭组件的情况下选择CheckboxMenu

How to update the label of p:selectCheckboxMenu without the component being closed after ajax call in primefaces?

本文关键字：调用 选择 CheckboxMenu 情况下 组件 ajax primefaces 更新 何更新 标签      更新时间：2023-09-26

当我试图从backingbean动态生成标签时，出现了一个问题。问题是，每次选择显示的下拉列表都会消失，但标签会正确更新。有解决办法吗？

<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>

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);
            }
        }
    }
}

以下是

将widgetVar="someVarName"添加到p:selectCheckboxMenu

并通过添加oncomplete="someVarName.show()" 来修改您的p:"ajax

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>

在最新的PrimeFaces中，您应该使用oncomplete="PF('someVarName').show()"而不是oncomplete="someVarName.show()"

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