SLLambdaParser For Silverlight

曾经终败给现在 2022-04-22 09:38 148阅读 0赞

**将** [**LambdaParser** 开源项目整合到Silverlight中，在Silverlight客户端上执行C\#委托代码][LambdaParser_ _Silverlight_Silverlight_C]

LambdaParser源代码可在[http://code.google.com/p/lambda-parser/][LambdaParser_ _Silverlight_Silverlight_C] 下载

相关网址：[http://www.cnblogs.com/zhucai/archive/2010/01/25/lambdaparser.html][http_www.cnblogs.com_zhucai_archive_2010_01_25_lambdaparser.html] （朱才博客园）

修改条款：

1 修改了ExpressionParserCore.cs中的 GetTypeCore(string typeName)方法：

/// <summary>
            /// 根据类型名称获取类型的对象
            /// </summary>
            /// <param name="typeName"></param>
            /// <returns></returns>
            private Type GetTypeCore(string typeName)
            {
                #if SILVERLIGHT
                    Assembly a = typeof(System.Action).Assembly;
                    Type type = a.GetType(typeName, false);
                    if (type != null)
                        return type;
    
                    foreach (System.Windows.AssemblyPart ap in System.Windows.Deployment.Current.Parts)
                    {
                        System.Windows.Resources.StreamResourceInfo sri = System.Windows.Application.GetResourceStream(new Uri(ap.Source, UriKind.Relative));
                        Assembly assembly = new System.Windows.AssemblyPart().Load(sri.Stream);
                        type = assembly.GetType(typeName, false);
                        if (type != null)
                            return type;
                    }
                #else
                    // First - try all loaded types
                    foreach (Assembly assembly in AppDomain.CurrentDomain.GetAssemblies())
                    {
                        Type type = assembly.GetType(typeName, false, true);
                        if (type != null)
                            return type;
                    }
                #endif
                return type;
            }

2 编译时listParam.ConvertAll<Type>(m => m.Type).ToArray()会报错，换写该方法为GetTypes(listParam)：

private Type[] GetTypes(List<System.Linq.Expressions.Expression> listParam)
            {
                List<Type> types = new List<Type>();
                foreach (var expression in listParam)
                {
                    types.Add(expression.Type);
                }
    
                return types.ToArray();
            }

3 运行时ReadExpression中报错：“访问安全关键方法“System.Runtime.InteropServices.Marshal.SizeOf(System.Type)”的尝试失败。”

注释了case "typeof"

//#region case "sizeof":
                        //case "sizeof":
                        //    {
                        //        string str = GetBracketString(false);
                        //        Type type = GetType(str);
                        //        //currentExpression = System.Linq.Expressions.Expression.Constant(System.Runtime.InteropServices.Marshal.SizeOf(type));
                        //    }
                        //    break;
                        //#endregion

[LambdaParser_ _Silverlight_Silverlight_C]: http://code.google.com/p/lambda-parser/
[http_www.cnblogs.com_zhucai_archive_2010_01_25_lambdaparser.html]: http://www.cnblogs.com/zhucai/archive/2010/01/25/lambdaparser.html