javascript - 如何从我的 Controller grails 调用 js 函数

Question

我是 grails 新手，如果有人能帮助我就好了。

我有一个 js 函数，在 Controller 中执行一些操作后，我会在 Controller 中调用该函数来打开弹出窗口。

我有这个 gsp 文件:

<g:form controller="admin" method="post">
<table summary="generer PDF">
..
..
<td>
<g:actionSubmit value="generate" action="genererAction"/>
</td>
</tr>
</table>
</g:form>

当用户单击“生成”(按钮)时，必须调用此函数:

def generateAction = {
def result
...
if (result){ 
//here, if result=true a popup will be displayed
}
else  {
redirect(action: 'index')
}}

我希望你能帮助我。谢谢。

Answer 1

你可以使用ajax来做到这一点，这是一个例子:

查看:

<g:form controller="admin" method="post">
<table id="tableID" summary="generer PDF">
..
..
<td>
<!--<g:actionSubmit value="generate" action="genererAction"/>-->
<button onclick="preformAction(); return false;">generate</button>
</td>
</tr>
</table>
</g:form>

Controller :

def generateAction = {
def result
...
if (result){ 
//here, if result=true a popup will be displayed
render "success"
}
else  {
//redirect(action: 'index')
render "index"
}}

Script ://将此脚本复制到您的 View 中

<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script type="text/javascript">
function preformAction(){
    $.ajax({
        url:'${createLink(controller:"admin",action:"generateAction")}', // here you can pass the controller url
        data: {
            // data to be passed to controller
        },
        success : function(response){
            // this block is called after successful processing of controller
            // here you can call your js function after controller has finished its processing
            // consider response has 'success'
            if(response == 'success'){
                 OpenSAGPopup();
            } else if(response == 'index'){
                 window.location = '${createLink(controller:"admin",action:"index")}';
            }

        },
        error : function(response){
            // this block executes if any error occurs with the processing of controller
            alert("Error while generating pdf");
        },
    });
}
</script>

试试这个，如果有效请告诉我......

祝你编码愉快。