與動態執行的C#代碼進行通訊(4)

將inputCmdString中的外部變量$argname統一替換為(new ObjectHelper <m_context[“argname” ].GetType()> (m_context, “argname”)).Obj" 即可實現在動態代碼中對已定義外部變量的引用。

上述對inputCmdString的預處理代碼為：

Regex re;

// 處理未初始化的環境變量
            re = new Regex(@"^(\$)(\w)+");
            if (inputCmdString != null)
            {
                Match m = re.Match(inputCmdString);
                if (m != null && m.Length > 1)
                {
                    String outArgName = inputCmdString.Substring(m.Index, 

m.Length).Substring(1);
                    if (this[outArgName] == null)
                    {
                        String innerArgName = "TempArg_" + outArgName;
                        inputCmdString = "var " + inputCmdString.Replace

("$" + outArgName, innerArgName);
                        inputCmdString += ";m_context[\"" + outArgName + 

"\"]=" + innerArgName + ";";
                    }
                }
            }
            // 處理其它環境變量
            re = new Regex(@"(\$)(\w)+");
            IDictionary<String, String> ArgsList = new Dictionary<String, 

String>();
            if (inputCmdString != null)
            {
                MatchCollection mc = re.Matches(inputCmdString);
                if (mc != null)
                {
                    foreach (Match m in mc)
                    {
                        if (m.Length > 1)
                        {
                            String outArgName = inputCmdString.Substring(m.Index, 

m.Length).Substring(1);
                            if (!ArgsList.ContainsKey(outArgName))
                            {
                                Object obj = this[outArgName];
                                if (obj == null) throw new Exception("不存在環境變量

" + outArgName);
                                String innerArgName = String.Format(@"(new 

ObjectHelper<{0}>(m_context,""{1}"")).Obj", obj.GetType(), 

outArgName);
                                ArgsList.Add(outArgName, innerArgName);
                            }
                        }
                    }
                }
                foreach (String outArg in ArgsList.Keys)
                {
                    inputCmdString = inputCmdString.Replace("$" + outArg, 

ArgsList[outArg]);
                }
            }