public static void CheckThrowException(int hresult, ref ExcepInfo excepInfo, uint argErr, string message) {
if (ComHresults.IsSuccess(hresult)) {
return;
}
switch (hresult) {
case ComHresults.DISP_E_BADPARAMCOUNT:
// The number of elements provided to DISPPARAMS is different from the number of arguments
// accepted by the method or property.
throw Error.DispBadParamCount(message);
case ComHresults.DISP_E_BADVARTYPE:
//One of the arguments in rgvarg is not a valid variant type.
break;
case ComHresults.DISP_E_EXCEPTION:
// The application needs to raise an exception. In this case, the structure passed in pExcepInfo
// should be filled in.
throw excepInfo.GetException();
case ComHresults.DISP_E_MEMBERNOTFOUND:
// The requested member does not exist, or the call to Invoke tried to set the value of a
// read-only property.
throw Error.DispMemberNotFound(message);
case ComHresults.DISP_E_NONAMEDARGS:
// This implementation of IDispatch does not support named arguments.
throw Error.DispNoNamedArgs(message);
case ComHresults.DISP_E_OVERFLOW:
// One of the arguments in rgvarg could not be coerced to the specified type.
throw Error.DispOverflow(message);
case ComHresults.DISP_E_PARAMNOTFOUND:
// One of the parameter DISPIDs does not correspond to a parameter on the method. In this case,
// puArgErr should be set to the first argument that contains the error.
break;
case ComHresults.DISP_E_TYPEMISMATCH:
// One or more of the arguments could not be coerced. The index within rgvarg of the first
// parameter with the incorrect type is returned in the puArgErr parameter.
throw Error.DispTypeMismatch(argErr, message);
case ComHresults.DISP_E_UNKNOWNINTERFACE:
// The interface identifier passed in riid is not IID_NULL.
break;
case ComHresults.DISP_E_UNKNOWNLCID:
// The member being invoked interprets string arguments according to the LCID, and the
// LCID is not recognized.
break;
case ComHresults.DISP_E_PARAMNOTOPTIONAL:
// A required parameter was omitted.
throw Error.DispParamNotOptional(message);
}
Marshal.ThrowExceptionForHR(hresult);
}
public static int IDispatchInvoke(
IntPtr dispatchPointer,
int memberDispId,
ComTypes.INVOKEKIND flags,
ref ComTypes.DISPPARAMS dispParams,
out Variant result,
out ExcepInfo excepInfo,
out uint argErr
) {
int hresult = _IDispatchInvoke(
dispatchPointer,
memberDispId,
flags,
ref dispParams,
out result,
out excepInfo,
out argErr
);
if (hresult == ComHresults.DISP_E_MEMBERNOTFOUND
&& (flags & ComTypes.INVOKEKIND.INVOKE_FUNC) != 0
&& (flags & (ComTypes.INVOKEKIND.INVOKE_PROPERTYPUT | ComTypes.INVOKEKIND.INVOKE_PROPERTYPUTREF)) == 0) {
// Re-invoke with no result argument to accomodate Word
hresult = _IDispatchInvokeNoResult(
dispatchPointer,
memberDispId,
ComTypes.INVOKEKIND.INVOKE_FUNC,
ref dispParams,
out result,
out excepInfo,
out argErr);
}
return hresult;
}