internal void InitializeControl(RaControl ctrl)
{
// We store all Ra Controls in a list for easily access later down the road...
RaControls.Add(ctrl);
// Making sure we only run the initialization logic ONCE...!!
if (RaControls.Count == 1)
{
if (((Page)HttpContext.Current.CurrentHandler).Request.Params["HTTP_X_MICROSOFTAJAX"] != null)
{
return;
}
if (IsCallback)
{
// This is a Ra-Ajax callback, we need to wait until the Page Load
// events are finished loading and then find the control which
// wants to fire an event and do so...
((Page)HttpContext.Current.CurrentHandler).LoadComplete += CurrentPage_LoadComplete;
// Checking to see if the Filtering logic has been supressed
if (!SupressAjaxFilters)
{
((Page)HttpContext.Current.CurrentHandler).Response.Filter = new CallbackFilter(((Page)HttpContext.Current.CurrentHandler).Response.Filter);
}
}
else
{
((Page)HttpContext.Current.CurrentHandler).LoadComplete += CurrentPage_LoadComplete_NO_AJAX;
// Checking to see if the Filtering logic has been supressed
if (!SupressAjaxFilters)
{
((Page)HttpContext.Current.CurrentHandler).Response.Filter = new PostbackFilter(((Page)HttpContext.Current.CurrentHandler).Response.Filter);
}
}
}
}
private void CurrentPage_LoadComplete(object sender, EventArgs e)
{
// Storing request viewstate in order to be able to "diff"
// them in rendering of response
_requestViewState = ((Page)HttpContext.Current.CurrentHandler).Request.Params["__VIEWSTATE"];
// Finding the Control which initiated the request
string idOfControl = ((Page)HttpContext.Current.CurrentHandler).Request.Params["__RA_CONTROL"];
// Setting Response Content-Type to JavaScript
((Page)HttpContext.Current.CurrentHandler).Response.ContentType = "text/javascript";
// Checking to see if this is a "non-Control" callback...
if (string.IsNullOrEmpty(idOfControl))
{
string functionName = ((Page)HttpContext.Current.CurrentHandler).Request.Params["__FUNCTION_NAME"];
if (string.IsNullOrEmpty(functionName))
{
return;
}
Control ctrlToCallFor = ((Page)HttpContext.Current.CurrentHandler);
MethodInfo webMethod = ExtractMethod(functionName, ref ctrlToCallFor);
if (webMethod == null || webMethod.GetCustomAttributes(typeof(Ra.WebMethod), false).Length == 0)
{
throw new Exception("Cannot call a method without a WebMethod attribute");
}
ParameterInfo[] parameters = webMethod.GetParameters();
object[] args = new object[parameters.Length];
for (int idx = 0; idx < parameters.Length && ((Page)HttpContext.Current.CurrentHandler).Request.Params["__ARG" + idx] != null; idx++)
{
args[idx] = Convert.ChangeType(((Page)HttpContext.Current.CurrentHandler).Request.Params["__ARG" + idx], parameters[idx].ParameterType);
}
object retVal = webMethod.Invoke(ctrlToCallFor, args);
if (retVal != null)
{
WriterAtBack.Write("Ra.Control._methodReturnValue='{0}';",
string.Format(CultureInfo.InvariantCulture, "{0}", retVal).Replace("\\", "\\\\").Replace("'", "\\'"));
}
return;
}
RaControl ctrl = RaControls.Find(
delegate(RaControl idx)
{
return(idx.ClientID == idOfControl);
});
// Getting the name of the event the control raised
string eventName = ((Page)HttpContext.Current.CurrentHandler).Request.Params["__EVENT_NAME"];
// Casting the initiated control to the interface expected all Ra Controls to be
IRaControl raCtrl = ctrl as IRaControl;
if (ctrl == null)
{
throw new ApplicationException("A control which was not a Ra Control initiated a callback, implement the IRaControl interface on the control");
}
// Dispatching the event to our Ra Control...
raCtrl.DispatchEvent(eventName);
}
