internal static void AsyncRequest(string url, string verb, string body, DOMElement triggerElement, AjaxOptions ajaxOptions) {
// Run the confirm popup, if specified
if (ajaxOptions.Confirm != null) {
if (!Script.Confirm(ajaxOptions.Confirm)) {
return;
}
}
// Override the url if specified in AjaxOptions
if (ajaxOptions.Url != null) {
url = ajaxOptions.Url;
}
// Override the verb if specified in AjaxOptions
if (ajaxOptions.HttpMethod != null) {
verb = ajaxOptions.HttpMethod;
}
// Add the hidden field to the body
if (body.Length > 0 && !body.EndsWith('&')) {
body += "&";
}
body += "X-Requested-With=XMLHttpRequest";
// Determine where to place the body
string requestBody = "";
if (verb.ToUpperCase() == "GET" || verb.ToUpperCase() == "DELETE") {
if (url.IndexOf('?') > -1) {
// Case 1: http://foo.bar/baz?abc=123
if (!url.EndsWith('&')) {
url += "&";
}
url += body;
}
else {
// Case 2: http://foo.bar/baz
url += "?";
url += body;
}
}
else {
requestBody = body;
}
// Create the request
WebRequest request = new WebRequest();
request.Url = url;
request.HttpVerb = verb;
request.Body = requestBody;
if (verb.ToUpperCase() == "PUT") {
request.Headers["Content-Type"] = "application/x-www-form-urlencoded;";
}
request.Headers["X-Requested-With"] = "XMLHttpRequest";
DOMElement updateElement = null;
if (ajaxOptions.UpdateTargetId != null) {
updateElement = Document.GetElementById(ajaxOptions.UpdateTargetId);
}
DOMElement loadingElement = null;
if (ajaxOptions.LoadingElementId != null) {
loadingElement = Document.GetElementById(ajaxOptions.LoadingElementId);
}
// Create the AjaxContext for the request
AjaxContext ajaxContext = new AjaxContext(request, updateElement, loadingElement, ajaxOptions.InsertionMode);
// Run onBegin and check for cancellation
bool continueRequest = true;
if (ajaxOptions.OnBegin != null) {
// Have to convert to objects to force the "!== false" to be emitted.
// We want no return value to be treated as returning true, so we only want to cancel the request if the result is exactly "false"
continueRequest = (object)ajaxOptions.OnBegin(ajaxContext) != (object)false;
}
// Display the loading element, if specified
if (loadingElement != null) {
Type.InvokeMethod(typeof(Sys.UI.DomElement), "setVisible", ajaxContext.LoadingElement, true);
}
if (continueRequest) {
// Setup the callback
request.Completed += delegate(WebRequestExecutor executor) {
MvcHelpers.OnComplete(request, ajaxOptions, ajaxContext);
};
request.Invoke();
}
}
