// Forwarded from XlCall
public static object RTD(string progId, string server, params string[] topics)
{
// Check if this is any of our business.
if (!string.IsNullOrEmpty(server) || !registeredRtdServerTypes.ContainsKey(progId))
{
// Just pass on to Excel.
return CallRTD(progId, null, topics);
}
// Check if already loaded.
if (loadedRtdServers.ContainsKey(progId))
{
// Call Excel using the synthetic RtdSrv.xxx (or actual from attribute) ProgId
return CallRTD(loadedRtdServers[progId], null, topics);
}
// Not loaded already - need to get the Rtd server loaded
// TODO: Need to reconsider registration here.....
// Sometimes need stable ProgIds.
Type rtdServerType = registeredRtdServerTypes[progId];
object rtdServer = Activator.CreateInstance(rtdServerType);
RtdServerWrapper rtdServerWrapper = new RtdServerWrapper(rtdServer, progId);
// We pick a new Guid as ClassId for this add-in...
CLSID clsId = Guid.NewGuid();
// ... but take a stable ProgId from the XllPath and type's FullName - max 39 chars.
// ... (bad idea - this will cause Excel to try to load this RTD server while it is not registered.)
// Guid typeGuid = GetGuidFromString(DnaLibrary.XllPath + ":" + rtdServerType.FullName);
// string progIdRegistered = "RtdSrv." + typeGuid.ToString("N");
// by making a fresh progId, we are sure Excel will try to load when we are ready.
string progIdRegistered = "RtdSrv." + clsId.ToString("N");
Debug.Print("RTD - Using ProgId: {0} for type: {1}", progIdRegistered, rtdServerType.FullName);
// Mark as loaded - ServerTerminate in the wrapper will remove.
// TODO: Consider multithread race condition...
loadedRtdServers[progId] = progIdRegistered;
using (SingletonClassFactoryRegistration regClassFactory = new SingletonClassFactoryRegistration(rtdServerWrapper, clsId))
using (ProgIdRegistration regProgId = new ProgIdRegistration(progIdRegistered, clsId))
using (ClsIdRegistration regClsId = new ClsIdRegistration(clsId, progIdRegistered))
{
return CallRTD(progIdRegistered, null, topics);
}
}
public static void LoadComAddIn(ExcelComAddIn addIn)
{
// We pick a new Guid as ClassId for this add-in.
CLSID clsId = Guid.NewGuid();
// and make the ProgId from this Guid - max 39 chars....
string progId = "AddIn." + clsId.ToString("N");
addIn.SetProgId(progId);
// Put together some nicer descriptions for the Add-ins dialog.
string friendlyName;
if (addIn is ExcelRibbon)
friendlyName = addIn.DnaLibrary.Name + " (Ribbon Helper)";
else if (addIn is ExcelCustomTaskPaneAddIn)
friendlyName = addIn.DnaLibrary.Name + " (Custom Task Pane Helper)";
else
friendlyName = addIn.DnaLibrary.Name + " (COM Add-in Helper)";
string description = string.Format("Dynamically created COM Add-in to load custom UI for the Excel Add-in {0}, located at {1}.", addIn.DnaLibrary.Name, DnaLibrary.XllPath);
try
{
Debug.Print("Getting Application object");
object app = ExcelDnaUtil.Application;
Type appType = app.GetType();
Debug.Print("Got Application object: " + app.GetType().ToString());
CultureInfo ci = new CultureInfo(1033);
object excelComAddIns;
object comAddIn;
using (SingletonClassFactoryRegistration regClassFactory = new SingletonClassFactoryRegistration(addIn, clsId))
using (ProgIdRegistration regProgId = new ProgIdRegistration(progId, clsId))
using (ComAddInRegistration regComAddIn = new ComAddInRegistration(progId, friendlyName, description))
{
excelComAddIns = appType.InvokeMember("COMAddIns", BindingFlags.GetProperty, null, app, null, ci);
// Debug.Print("Got COMAddins object: " + excelComAddIns.GetType().ToString());
appType.InvokeMember("Update", BindingFlags.InvokeMethod, null, excelComAddIns, null, ci);
// Debug.Print("Updated COMAddins object with AddIn registered");
comAddIn = excelComAddIns.GetType().InvokeMember("Item", BindingFlags.InvokeMethod, null, excelComAddIns, new object[] { progId }, ci);
// Debug.Print("Got the COMAddin object: " + comAddIn.GetType().ToString());
// At this point Excel knows how to load our add-in by CLSID, so we could clean up the
// registry aggressively, before the actual (dangerous?) loading starts.
// But this seems to lead to some distress - Excel has some assertion checked when
// it updates the LoadBehavior after a successful load....
comAddIn.GetType().InvokeMember("Connect", BindingFlags.SetProperty, null, comAddIn, new object[] { true }, ci);
// Debug.Print("COMAddin is loaded.");
loadedComAddIns.Add(comAddIn);
}
}
catch (Exception e)
{
Debug.Print("LoadComAddIn exception: " + e.ToString());
// CONSIDER: How to deal with errors here...? For now I just re-raise the exception.
throw;
}
}