private static int GetDispIDForName(this IDispatchEx dispatchEx, string name, bool ensure, bool ignoreCase)
{
var flags = ignoreCase ? DispatchNameFlags.CaseInsensitive : DispatchNameFlags.CaseSensitive;
if (ensure)
{
flags |= DispatchNameFlags.Ensure;
}
var result = dispatchEx.GetDispID(name, flags, out var dispid);
if (ensure && (result == HResult.DISP_E_UNKNOWNNAME))
{
throw new NotSupportedException("The object does not support dynamic properties");
}
if (HResult.Succeeded(result))
{
return(dispid);
}
if (name.IsDispIDName(out dispid))
{
return(dispid);
}
var member = dispatchEx.GetMembers().FirstOrDefault(testMember => testMember.Name.Equals(name, ignoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal));
if (member != null)
{
return(member.DispID);
}
throw new MissingMemberException(MiscHelpers.FormatInvariant("The object has no property named '{0}'", name));
}
public static void SetProperty(this IDispatchEx dispatchEx, string name, bool ignoreCase, object[] args)
{
if (args.Length < 1)
{
throw new ArgumentException("Invalid argument count", "args");
}
int dispid;
var result = dispatchEx.GetDispID(name, DispatchNameFlags.Ensure | (ignoreCase ? DispatchNameFlags.CaseInsensitive : DispatchNameFlags.CaseSensitive), out dispid);
if (result == RawCOMHelpers.HResult.DISP_E_UNKNOWNNAME)
{
throw new NotSupportedException("Object does not support dynamic properties");
}
Marshal.ThrowExceptionForHR(result);
using (var argVariantArrayBlock = new CoTaskMemVariantArgsBlock(args))
{
using (var namedArgDispidBlock = new CoTaskMemBlock(sizeof(int)))
{
EXCEPINFO excepInfo;
Marshal.WriteInt32(namedArgDispidBlock.Addr, SpecialDispIDs.PropertyPut);
var dispArgs = new DISPPARAMS {
cArgs = args.Length, rgvarg = argVariantArrayBlock.Addr, cNamedArgs = 1, rgdispidNamedArgs = namedArgDispidBlock.Addr
};
dispatchEx.InvokeEx(dispid, 0, DispatchFlags.PropertyPut | DispatchFlags.PropertyPutRef, ref dispArgs, IntPtr.Zero, out excepInfo);
}
}
}
public static object GetProperty(this IDispatchEx dispatchEx, string name, bool ignoreCase, object[] args)
{
int dispid;
Marshal.ThrowExceptionForHR(dispatchEx.GetDispID(name, ignoreCase ? DispatchNameFlags.CaseInsensitive : DispatchNameFlags.CaseSensitive, out dispid));
using (var argVariantArrayBlock = new CoTaskMemVariantArgsBlock(args))
{
using (var resultVariantBlock = new CoTaskMemVariantBlock())
{
EXCEPINFO excepInfo;
var dispArgs = new DISPPARAMS {
cArgs = args.Length, rgvarg = argVariantArrayBlock.Addr, cNamedArgs = 0, rgdispidNamedArgs = IntPtr.Zero
};
Marshal.ThrowExceptionForHR(dispatchEx.InvokeEx(dispid, 0, DispatchFlags.PropertyGet, ref dispArgs, resultVariantBlock.Addr, out excepInfo));
return(Marshal.GetObjectForNativeVariant(resultVariantBlock.Addr));
}
}
}