private static object TestProgIdInstance(string progId, params string[] memberNames)
{
Console.WriteLine("------ ProgId: {0} ------", progId);
Type standardType = Type.GetTypeFromProgID(progId);
WriteAllMembers(standardType);
object obj = Activator.CreateInstance(standardType);
WriteAllMembers(obj.GetType());
// Make sure it implements IDispatch.
if (!DispatchUtility.ImplementsIDispatch(obj))
{
throw new ArgumentException("The object created for " + progId + " doesn't implement IDispatch.");
}
// See if we can get Type info and then do some reflection.
Type dispatchType = DispatchUtility.GetType(obj, false);
if (dispatchType != null)
{
WriteAllMembers(dispatchType);
}
// Look up the requested member names.
Console.WriteLine("Requested Member: DISPID");
foreach (string memberName in memberNames)
{
LookupMemberDispId(obj, memberName);
}
return(obj);
}
static void Main(string[] args)
{
// http://msdn.microsoft.com/en-us/library/z9ty6h50(VS.85).aspx
// Note: The WriteBlankLines method is actually on TextStream not FileSystemObject.
TestProgIdInstance("Scripting.FileSystemObject", "DeleteFile", "WriteBlankLines", "Drives", "GetParentFolderName", "FlyingMonkey");
// ADO returns 1000+ for each new member we ask for. IDispatchEx at work?
object conn = TestProgIdInstance("ADODB.Connection", "Open", "ConnectionString", "PingTheInterwebs", "BatmanVsSuperman");
// Invoke by name.
string provider = (string)DispatchUtility.Invoke(conn, "Provider", null);
Console.Write("Provider by name: ");
Console.WriteLine(provider);
// Invoke by DISPID.
int providerDispId;
if (DispatchUtility.TryGetDispId(conn, "Provider", out providerDispId))
{
provider = (string)DispatchUtility.Invoke(conn, providerDispId, null);
Console.Write("Provider by DISPID: ");
Console.WriteLine(provider);
}
if (Debugger.IsAttached)
{
Console.Write("Press any key to continue. . . ");
Console.ReadKey(true);
}
}
private static void LookupMemberDispId(object obj, string name)
{
Console.Write("\t" + name + ": ");
int dispId;
if (DispatchUtility.TryGetDispId(obj, name, out dispId))
{
Console.WriteLine(dispId);
}
else
{
Console.WriteLine("<not found>");
}
}