public void AutoOpen()
{
ExcelIntegration.RegisterUnhandledExceptionHandler(ErrorHandler);
try {
com_addin = new MyCom();
ExcelComAddInHelper.LoadComAddIn(com_addin);
} catch (Exception e) {
MessageBox.Show("Error loading COM AddIn: " + e.ToString());
}
}
public static void LoadComAddIn(ExcelComAddIn addIn)
{
// If we are called without the addIn's DnaLibrary being set, default to the current library
if (addIn.DnaLibrary == null)
addIn.DnaLibrary = DnaLibrary.CurrentLibrary;
Guid clsId;
string progId;
// If we have both an explicit Guid and an explicit ProgId, then use those, else create synthetic ProgId.
object[] progIdAttrs = addIn.GetType().GetCustomAttributes(typeof(ProgIdAttribute), false);
object[] guidAttrs = addIn.GetType().GetCustomAttributes(typeof(GuidAttribute), false);
if (progIdAttrs.Length >= 1 && guidAttrs.Length >= 1)
{
// Use the attributes
ProgIdAttribute progIdAtt = (ProgIdAttribute)progIdAttrs[0];
progId = progIdAtt.Value;
GuidAttribute guidAtt = (GuidAttribute)guidAttrs[0];
clsId = new Guid(guidAtt.Value);
}
else
{
// Use a stable Guid derived from the Xll Path (since Excel stores load-times and other info for every COM add-in loaded in the registry)
clsId = ExcelDnaUtil.XllGuid;
// and make the ProgId from this Guid - max 39 chars....
progId = "Dna." + clsId.ToString("N") + "." + loadedComAddIns.Count;
}
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)"; (No more - it is displayed in the Ribbon tooltip!)
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);
Logger.ComAddIn.Verbose("Getting Application object");
object app = ExcelDnaUtil.Application;
Type appType = app.GetType();
Logger.ComAddIn.Verbose("Got Application object: " + app.GetType().ToString());
CultureInfo ci = new CultureInfo(1033);
object excelComAddIns;
object comAddIn;
try
{
using (new SingletonClassFactoryRegistration(addIn, clsId))
using (new ProgIdRegistration(progId, clsId))
using (new ClsIdRegistration(clsId, progId))
using (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 (UnauthorizedAccessException secex)
{
Logger.ComAddIn.Error(secex, "The Ribbon/COM add-in helper required by add-in {0} could not be registered.\r\nThis may be due to restricted permissions on the user's HKCU\\Software\\Classes key.", DnaLibrary.CurrentLibrary.Name);
}
catch (Exception ex)
{
// If Excel is running with the /K switch it seems to indicate we're running
// in a COM-unfriendly mode where (sometimes) the COM add-in for the ribbon won't load.
// We skip the log display in this case.
// CONSIDER: How would an add-in know that its COM AddIn load failed in this case?
if (!Environment.CommandLine.Contains(" /K"))
{
Logger.ComAddIn.Error("The Ribbon/COM add-in helper required by add-in {0} could not be registered.\r\nThis is an unexpected error.", DnaLibrary.CurrentLibrary.Name);
}
Logger.ComAddIn.Info("LoadComAddIn exception: {0} with /K in CommandLine", ex.ToString());
}
}
public virtual void LoadComAddIn(ExcelComAddIn addIn)
{
throw new System.NotImplementedException();
}
public override void LoadComAddIn(ExcelComAddIn addIn)
{
ExcelComAddInHelper.LoadComAddIn(addIn);
}
