public override bool TryInferReturnType(ActivityWithResult expression, EditingContext context, out Type returnType)
{
bool succeeded = false;
Fx.Assert(expression.GetType().GetGenericTypeDefinition() == typeof(VisualBasicValue <>) ||
expression.GetType().GetGenericTypeDefinition() == typeof(VisualBasicReference <>), "VisualBasicExpressionMorphHelper should only apply to VB expression.");
SourceExpressionException compileError;
VisualBasicSettings settings;
if (ExpressionHelper.IsGenericLocationExpressionType(expression))
{
VisualBasicDesignerHelper.RecompileVisualBasicReference(
expression,
out returnType,
out compileError,
out settings);
}
else
{
VisualBasicDesignerHelper.RecompileVisualBasicValue(
expression,
out returnType,
out compileError,
out settings);
}
if (compileError == null)
{
succeeded = true;
if (settings != null)
{
//merge with import designer
foreach (VisualBasicImportReference reference in settings.ImportReferences)
{
ImportDesigner.AddImport(reference.Import, context);
}
}
}
return(succeeded);
}
static SendReply CreateSendReply(ModelItem target, object context)
{
SendReply reply = null;
ModelItem receive = (ModelItem)context;
if (null != receive)
{
Receive receiveInstance = (Receive)receive.GetCurrentValue();
string name = null;
//if no correlation is set - create one
if (null == receiveInstance.CorrelatesWith)
{
Variable handleVariable = null;
//first, look for nearest variable scope
ModelItemCollection variableScope = VariableHelper.FindRootVariableScope(receive).GetVariableCollection();
if (null != variableScope)
{
ModelItemCollection correlations = receive.Properties["CorrelationInitializers"].Collection;
bool hasRequestReplyHandle = false;
foreach (ModelItem item in correlations)
{
if (item.ItemType.IsAssignableFrom(typeof(RequestReplyCorrelationInitializer)))
{
hasRequestReplyHandle = true;
break;
}
}
if (!hasRequestReplyHandle)
{
//create unique variable name
name = variableScope.CreateUniqueVariableName("__handle", 1);
//create variable
handleVariable = Variable.Create(name, typeof(CorrelationHandle), VariableModifiers.None);
//add it to the scope
variableScope.Add(handleVariable);
//setup correlation
ImportDesigner.AddImport(CorrelationHandleTypeNamespace, receive.GetEditingContext());
VariableValue <CorrelationHandle> expression = new VariableValue <CorrelationHandle> {
Variable = handleVariable
};
InArgument <CorrelationHandle> handle = new InArgument <CorrelationHandle>(expression);
correlations.Add(new RequestReplyCorrelationInitializer {
CorrelationHandle = handle
});
}
}
}
reply = new SendReply()
{
DisplayName = string.Format(CultureInfo.CurrentUICulture, "SendReplyTo{0}", receive.Properties["DisplayName"].ComputedValue),
Request = (Receive)receive.GetCurrentValue(),
};
}
else
{
MessageBox.Show(
(string)StringResourceDictionary.Instance["receiveActivityCreateReplyErrorLabel"] ?? "Source 'Reply' element not found!",
(string)StringResourceDictionary.Instance["MessagingActivityTitle"] ?? "Send",
MessageBoxButton.OK, MessageBoxImage.Error);
}
return(reply);
}