https://maine-registered-agents.com/WebResource.axd?d=cvOdlxFWXas_…j7gdgSu4KZG8r9i9lmGN90&t=639030533500000000

1//------------------------------------------------------------------------------------------------------------------------------------------------
2function CallbackPage_ExecuteAsyncCallback(serverFunction, clientFunction) {    
3
4    //Set the hidden CallbackPage ReturnValue control current flag to true so we know what hidden control to get the
5    //return value from after the async callback returns a value:
6    document.getElementById("hidCallbackPage_ReturnValue").setAttribute("currentflag", "1");
7
8    //HtmlEncode the serverFunction arg or ASP.NET will consider it a security violation due to the column delimiters and
9    //then we must URL Encode the string since HtmlEncode will put in "&" characters which are part of a url:
10    serverFunction = Callback_Escape(Callback_HtmlEncode(serverFunction));
11
12    //Instantiate the browser specific XmlHttp object:      
13    var xmlHttp = Callback_CreateXmlHttpObject();
14
15    //Open an Asynchronous post to the current page and set the request header:
16    xmlHttp.open("POST", document.location.href, true);
17    xmlHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
18
19    //Set the Xml object's OnReadyStateChange handler will will wait for the Aysnc request to return a value:
20    xmlHttp.onreadystatechange = function() {
21
22        if (xmlHttp.readyState == 4) {
23
24            //Set the returnValue:
25            var returnValue = "";
26            var xmlHttpException = null;
27            if (xmlHttp.status == 200) {
28
29                returnValue = xmlHttp.responseText;
30
31            }
32            else {
33
34                //NOTE: Most of these exceptions are caused by server timeouts or other server unexpected server issues,
35                //the default server timeout in ASP.NET is 120 seconds, but the developer can extend this in the
36                //site's web.config:
37                returnValue = null;
38                xmlHttpException = xmlHttp.statusText;
39
40            }
41
42            //Finally, trigger the client side callback handler function passed by the developer:
43            CallbackPage_Internal_GetReturnValue(returnValue, clientFunction, xmlHttpException);
44
45        }
46
47    };
48
49    //Send the callback async method to the server which will be executed via reflection:    
50    xmlHttp.send("InenviXmlHttpCallbackMethod=" + serverFunction + "&ClassType=Page");
51
52}
53//------------------------------------------------------------------------------------------------------------------------------------------------
54function CallbackPage_Internal_GetReturnValue(returnValue, clientFunction, xmlHttpException) {
55
56    //Check the xmlHttpException to see if its not null, if so, then an unhandled exception occured so we need
57    //to pass it to the ClientFunction and then its up to the developer to check for its presence as it will only
58    //be there if an unhandled xmlHttpException occurred (for example, a server timeout is the most frequent cause:
59    if (xmlHttpException == null) {
60
61        document.getElementById("hidCallbackPage_ReturnValue").value = returnValue;
62        eval(clientFunction + "();");
63
64    }
65    else {
66
67        document.getElementById("hidCallbackPage_ReturnValue").value = ""; //Set the return value to an empty string
68        eval(clientFunction + "(\"" + xmlHttpException + "\");");
69
70    }
71
72}
73//------------------------------------------------------------------------------------------------------------------------------------------------