public static CustomTaskPane CreateCustomTaskPane(Type userControlType, string title, object parent)
{
//if (!typeof(System.Windows.Forms.UserControl).IsAssignableFrom(userControlType))
//{
// throw new ArgumentException("userControlType for Custom Task Pane must be derive from type System.Windows.Forms.UserControl");
//}
// I could use the ProgId and ClsId of the UserControl type here.
// But then the reigstration has to be persistent or coordinated, which I dislike.
// It's already a problem for the RTD servers.
// Users that want persistent and consistent names, can sort out registration themselves, or use the ExcelComClass support.
// Then the CTP is created through the CreateCustomTaskPane("My.ProgId",...) overloads.
// So when passed the type, I always synthesize a progid.
// We pick a new Guid as ClassId for this add-in...
Guid clsId = Guid.NewGuid();
// ...and make the ProgId from this Guid - max 39 chars.
string progId = "CtpSrv." + clsId.ToString("N");
// Register UserControl
// (could probably get away with RegistrationServices.RegisterTypeForComClients instead of our own ClassFactoryRegistration class)
using (ProgIdRegistration progIdReg = new ProgIdRegistration(progId, clsId))
using (ClsIdRegistration clsIdReg = new ClsIdRegistration(clsId, progId))
using (ClassFactoryRegistration cf = new ClassFactoryRegistration(userControlType, clsId))
{
return CreateCustomTaskPane(progId, title, parent);
}
}
// 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);
}
}