C＃执行变量代码

Question

Is it possible to execute code from a string variable, like:
string mystring = "Console.WriteLine(\\"Hi\\");"; Is it possible to execute the contents of mystring (printing 'Hi')?

Answer 1

It's possible using the System.Reflection.Emit or System.CodeDom namespaces, but it's not exactly a good idea as there's no mechanism to control what namespaces are and are not allowed. A user could build a string that would wipe your hard drive.

eval()-like functions are huge gaping security holes and should be avoided. The preferred alternative is a DSL (domain specific language) .

Answer 2

Yes. Fire up the compiler at runtime and pass in your code. It will spit out executable code. See the System.CodeDom namespace, especially, System.CodeDom.Compiler .

Answer 3

使用代码DOM

Answer 4

Need to use reflection to get something like that. C# is not dynamic or interpreted language, so you dont get it out of the box

http://www.codeproject.com/KB/dotnet/Expr.aspx

How can I evaluate C# code dynamically?