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最新评论
We have covered the topic of expression tree and lambda - serie 1. Serie 2 is like a complementary to serie 1 to cover something that is not the core but may come useful when you are in need of it.
Refactor-Proof references to members
If you are doing some WPF programming you use extensivly the interface called INotifyProeprtyChanged, you may be aware of the refactoirng problem where the properyt name is encoded in the string, which makes the refactoring tools fails to work.
The same has been true that if you are doing reflectoin based programing, where if you wan to achieve the function of "use the property of BirthDate defined in my type" you have to use string.
With the Expression Tree, you can build a Expression tree representing a property reference using a lambda expression.
The the method can dissect the expresion tree and work ou thte property you mean.
As an example of how it can be used, let's see the following
serializationContext.AddProperty(x => x.BirthDate);
Simpler Reflection
There are some restriction in Generic in C# that generics does not play nicesly with arithmetic operators.
The key is to provide a generic Operator class and a nongeneric helper as follow.
T runningTotal = initialValue; foreach (T item i n value) { runningTotal = Operator.Add(runningTotal, values); }
TODO:
write some code to go through the use cases.
发表评论
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wpf - example to enhance ComboBox for AutoComplete
2014-09-19 15:56 1937first let’s see an example ... -
Investigate and troubleshoot possible memory leak issue of .NET application
2014-07-31 10:42 0Hi All, I would like to sh ... -
C# – CoerceValueCallback合并、替换元数据值
2013-08-05 21:59 1891Topic: C# – CoerceValueCallbac ... -
wpf – ListView交替背景色
2013-07-02 20:56 6492Wpf – Alternate background col ... -
C# - 简单介绍TaskScheduler
2013-06-29 17:18 11934标题: C# - 简单介绍TaskSchedulerTit ... -
c# - Get enum from enum attribute
2013-06-27 21:32 1201DescriptionAttribute gives the ... -
C# - PInvoke, gotchas on the RegisterClassEx and the CreateWindowEx
2013-06-24 13:49 2534I get an exception message li ... -
c# - Use PInvoke to create simple win32 Application
2013-06-24 11:59 10883In this post, .net platform h ... -
c# - Linq's Select method as the Map function
2013-06-19 18:47 1241If you comes from a functiona ... -
c# - Tips of Linq expression Any to determine if a collection is Empty
2013-06-19 18:29 894When you are @ the linq expres ... -
myth buster - typeof accepting array of types not acceptable
2013-06-19 17:17 781I have seen from some book whe ... -
windows - trying to create WIN32 application with PInvoke
2013-06-19 14:34 0While it is stupid to do such ... -
WPF - Setting foreground color of Entire window
2013-06-13 16:00 1880You might as well as I would s ... -
WPF - Enhanced TabControl - TabControlEx aka Prerendering TabControl
2013-06-13 13:12 5291As an opening word, let's che ... -
wpf - ControlTemplate and AddLogicChild/RemoveLogicalChild
2013-06-10 15:42 1143Recently I was trying to debug ... -
c# - P/Invoke, DllImport, Marshal Structures and Type conversions
2013-06-05 15:25 1659P/Invoke as in the following q ... -
c# - A study on the NativeWindow - encapsulate window handle and procedure
2013-06-05 14:40 6045NativeWindow gives you a way t ... -
WCF - Notify server when client connects
2013-06-03 18:19 1182It is sometimes very importan ... -
wcf - Debug to enable Server exception in Fault message
2013-06-03 15:47 1056WCF will be able to send back ... -
c# - determine if a type/object is serialzable
2013-05-30 16:35 838In WCF, primitives type are s ...
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