用委托c#代替Func
本文关键字:代替 Func | 更新日期: 2023-09-27 18:17:18
我们正在尝试将。net 3.5构建的应用程序迁移到。net 2.0(原因是让我们的exe在带有XP等没有3.5的旧机器上运行)
当这样做的时候,所有的事情现在都停留在一个主要问题上,用老式的委托替换Func(因为Func在2.0中不可用)。要替换的代码是这样的:
private Func<object, string> someName1;
private static Func<object, string> someName2;
internal Func<object, string> someProperty
{
get { return someName1?? (someName1= someName2); }
set { someName1= value; }
}
谁能帮我创建'someProperty'的方式,它只使用委托。
public delegate void Action();
public delegate void Action<T>(T t);
public delegate void Action<T, U>(T t, U u);
public delegate void Action<T, U, V>(T t, U u, V v);
public delegate TResult Func<TResult>();
public delegate TResult Func<T, TResult>(T t);
public delegate TResult Func<T, U, TResult>(T t, U u);
public delegate TResult Func<T, U, V, TResult>(T t, U u, V v);
public delegate TResult Func<T, U, V, W, TResult>(T t, U u, V v, W w);
具体而言:
public delegate string SomeDelegate(object someObject);
private SomeDelegate someName1;
private static SomeDelegate someName2;
internal SomeDelegate someProperty
{
get { return someName1?? (someName1= someName2); }
set { someName1= value; }
}
我相信你可以使用LinqBridge,它定义了。net 3.5中的Action
和Func
委托
.Net2.0委托代码如下:
private delegate void SomeName(object arg1, string arg2);
SomeName someName1, someName2;
internal SomeName SomeProperty
{
get
{
return someName1 ?? (someName1 = someName2);
}
set
{
someName1 = value;
}
}