Question

我有一个在服务器上发布的MVC 3项目。

方案

例如，我有一项将数据从(PC1)保存到(PC2)的功能。

用户在data(data in jqgrid)中查看(PC2)可能是open(open in page)，它会在(PC1)保存后自动刷新或更新页面或jqgrid数据？

我的jqgrid版本是4.3.3。

希望你们明白我在帖子中的意思。如果下来投票，发布反馈。感谢。

任何帮助都将被接受。

Answer 1

您可能想用ajax来完成这项工作，请阅读以下内容

如果我明白你的意思，那么你是否想要在服务器上轮询实时更新，无论是间隔还是别的......

选项1
向服务器发出正常的无状态ajax调用，然后强制服务器在限定时间内保留请求 [以克服服务器开销]

这也可以被称为反向ajax或彗星。
除非你打算使用websocket技术，否则我几乎不会强调你试试这个。

Answer 2

if(isset($_GET['finite'])){
#declare time for a session
$_SESSION['typing']=$reduce_browser_overhead=time();
#remember to close the session before entering the loop;
#if u dont close, then the browser will not reload the same website untill the connection is close or satisfied
session_write_close();
function loop(){
    #do this to access external variables  ===> $reduce_browser_overhead;
    global $con,$reduce_browser_overhead;
    #explicitly check 2exit
    #please do this to release mysql connection since they are in a loop
    if($reduce_browser_overhead+4<time()){
        echo ' ';ob_flush();flush();
        if(connection_aborted()){
            #do some work here before you finally exit the connection
            exit;
        }$reduce_browser_overhead=time();
    }
    #php prepare statement...
    $looper=$con->prepare("SELECT ROW FROM TABLE WHERE ID=SOMETHING AND $_SESSION[typing]=SOME_ROW");
    #The statement above willcause the loop to work
    #If a table had been update and table has not yet updated, this sql will detemin by the current time
    #meaning that if the time[integer] of SOME_ROW is not equal to the time in the session variable,
    #then it will let go to the client and then again it will continue looping untill the time in the
    #SOME TABLE ROW  changes....

    $looper->execute();
    $looper->store_result();
    if($looper->num_rows>0){
        sleep(2);
        #do some work before looping again
        loop();
        #you have to explicitly return to this loop to work as expected.
        return;
    }else{
        #send back data to the user or the client listening on the connection
        session_start();$_SESSION['typing']=time();session_write_close();
        #update the session before finishing the request so that the next time the request comes, the time will be equal to the DBserver time in the row and hence causing the loop again and again => more like a cycle
        echo 'After some time the server has received new data which is =>> '.$newdata;
    }
}loop();
exit;

＆＃13;

 //In another file on in the same document as the php / your server file  ==> do javascript below
    //first issue a normal / stateless ajax request to the target server
    $.ajax({
        //All optional but url required!
        url:'abc.php?var_one=blabla',
        cache:true,//whether to cache the requests
        timeout:(1000*60)*20,//timeoutthe request
        success:function(data){
            //if the server successfully completed the request
            //do some work here with data returned
        },
        error:function(){
            //if the server return an error
            //do more work around
            //or call the function again
        }
    });

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

＆＃13;

实时刷新/更新

2 个答案: