MEF 基础简介 三
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2022-03-26 10:28:23
MEF导出类的方法和属性 首先来说导出属性,因为这个比较简单,和导出类差不多,先来看看代码,主要看我加注释的地方,MusicBook.cs中的代码如下: program.cs中的代码如下: 下面还用foreach遍历输出属性的值,运行即可查看到结果。最后我会附上源码供大家下载,这里就不再截图了。 下 ......
mef导出类的方法和属性
首先来说导出属性,因为这个比较简单,和导出类差不多,先来看看代码,主要看我加注释的地方,musicbook.cs中的代码如下:
using system; using system.collections.generic; using system.linq; using system.text; using system.componentmodel.composition; namespace mefdemo { [export("musicbook")] public class musicbook : ibookservice { //导出私有属性 [export(typeof(string))] private string _privatebookname = "private music bookname"; //导出公有属性 [export(typeof(string))] public string _publicbookname = "public music bookname"; public string bookname { get; set; } } [export("mathbook", typeof(ibookservice))] public class mathbook : ibookservice { public string bookname { get; set; } public string getbookname() { return "mathbook"; } } [export("historybook", typeof(ibookservice))] public class historybook : ibookservice { public string bookname { get; set; } public string getbookname() { return "historybook"; } } }
program.cs中的代码如下:
using system; using system.collections.generic; using system.linq; using system.text; using system.reflection; using system.componentmodel.composition; using system.componentmodel.composition.hosting; namespace mefdemo { class program { [importmany("mathbook")] public ienumerable<object> services { get; set; } //导入属性,这里不区分public还是private [importmany] public list<string> inputstring { get; set; } static void main(string[] args) { program pro = new program(); pro.compose(); if (pro.services != null) { foreach (var s in pro.services) { var ss = (ibookservice)s; console.writeline(ss.getbookname()); } } foreach (var str in pro.inputstring) { console.writeline(str); } console.read(); } private void compose() { var catalog = new assemblycatalog(assembly.getexecutingassembly()); compositioncontainer container = new compositioncontainer(catalog); container.composeparts(this); } } }
下面还用foreach遍历输出属性的值,运行即可查看到结果。最后我会附上源码供大家下载,这里就不再截图了。
下面说导出方法吧,同理无论是公有方法还是私有方法都是可以导出的,musicbook代码如下:
using system; using system.collections.generic; using system.linq; using system.text; using system.componentmodel.composition; namespace mefdemo { [export("musicbook")] public class musicbook : ibookservice { //导出私有属性 [export(typeof(string))] private string _privatebookname = "private music bookname"; //导出公有属性 [export(typeof(string))] public string _publicbookname = "public music bookname"; public string bookname { get; set; } //导出公有方法 [export(typeof(func<string>))] public string getbookname() { return "musicbook"; } //导出私有方法 [export(typeof(func<int, string>))] private string getbookprice(int price) { return "$" + price; } } [export("mathbook", typeof(ibookservice))] public class mathbook : ibookservice { public string bookname { get; set; } public string getbookname() { return "mathbook"; } } [export("historybook", typeof(ibookservice))] public class historybook : ibookservice { public string bookname { get; set; } public string getbookname() { return "historybook"; } } }
program中的代码如下:
using system; using system.collections.generic; using system.linq; using system.text; using system.reflection; using system.componentmodel.composition; using system.componentmodel.composition.hosting; namespace mefdemo { class program { [importmany("mathbook")] public ienumerable<object> services { get; set; } //导入属性,这里不区分public还是private [importmany] public list<string> inputstring { get; set; } //导入无参数方法 [import] public func<string> methodwithoutpara { get; set; } //导入有参数方法 [import] public func<int,string> methodwithpara { get; set; } static void main(string[] args) { program pro = new program(); pro.compose(); if (pro.services != null) { foreach (var s in pro.services) { var ss = (ibookservice)s; console.writeline(ss.getbookname()); } } foreach (var str in pro.inputstring) { console.writeline(str); } //调用无参数方法 if (pro.methodwithoutpara != null) { console.writeline(pro.methodwithoutpara()); } //调用有参数方法 if (pro.methodwithpara != null) { console.writeline(pro.methodwithpara(3000)); } console.read(); } private void compose() { var catalog = new assemblycatalog(assembly.getexecutingassembly()); compositioncontainer container = new compositioncontainer(catalog); container.composeparts(this); } } }
导入导出方法用到了func<t>委托,当然没有返回值的话可以用action<t>委托,关于委托这里就不多说了,大家可以自行百度。