多重回应AJAX要求

您可以使用2个ajax调用来实现此目的，一个调用运行该进程，第二个调用定期轮询进度：

在服务器端：

public class ProgressInfo{    public int Percent {get;set;}    public bool Done {get;set;}}public JsonResult DoCalculation(string id){    ProgressInfo progress = new ProgressInfo();    if(!string.IsNullOrEmpty(id))    {        Session[id] = progress;    }    //periodicly update progress    progress.Percent++;}public JsonResult GetProgress(string id){    ProgressInfo progress;    if(string.IsNullOrEmpty(id)        || (progress = Session[id] as ProgressInfo) == null)    {        return Json(new { success = false        });    }    if(progress.done)    {        Session.Remove(id);    }    return Json(new {        success = true,        done = progress.done,        percent = progress.Percent    });}

在客户端：

var progressID = Math.random();function doCalculation() {    $.post('<%=Url.Action("DoCalcluation")%>/' + progressID);    setTimeout(pollProgress, 1000);}function pollProgress() {    $.post('<%=Url.Action("GetProgress")%>/' + progressID, function(response){        if(!response.success) { alert('Cannot find progress'); return;        } if(response.done) {     alert('Done!'); } else { alert('Progress at ' + response.precent + '%'); setTimeout(pollProgress, 1000 ); }    }, 'json');}