檢測何時在iframe上有響應？

Question

我已經創建了一個Ajax風格的文件下載（使用iframe）和所有工作得很好。不過，我需要在iframe中收到的響應來檢測......請看下圖：

的Javascript：

function download() { 
    var ifrm = $('#iframedownload')[0]; 
    ifrm.src = '/downloadfile.aspx?fileid=whatever'; 
    ifrm.onreadystatechange = function() { // Checking 
    if (this.readyState == 'complete') 
     alert("I would really like this piece to work!"); 
    }; 
} 

C＃爲downloadfile.aspx：

Response.AddHeader("content-disposition", "attachment; filename=\"" + zipFileName + "\""); 
Response.AddHeader("Content-Length", respBytes.Length.ToString()); 
Response.ContentType = "application/octet-stream"; 
Response.BinaryWrite(respBytes); 
Response.End(); 

感謝。

Answer 1

Handle the <iframe>'s onload and readystatechanged events。