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c# eval 执行字符串

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System.CodeDom.Compiler.ICodeCompiler comp = (new Microsoft.CSharp.CSharpCodeProvider().CreateCompiler());

System.CodeDom.Compiler.CompilerParameters cp = new System.CodeDom.Compiler.CompilerParameters();

object qswhEval2(string Expression){

StringBuilder code = new StringBuilder();

code.Append("using System; \n");

code.Append("namespace ADOGuy { \n");

code.Append(" public class _Evaluator { \n");

code.Append(" public object __foo() ");

code.Append("{ ");

code.AppendFormat(" return ({0}); ", Expression);

code.Append("}\n");

code.Append("} }");

System.CodeDom.Compiler.CompilerResults cr = comp.CompileAssemblyFromSource(cp, code.ToString());

System.Reflection.Assembly a = cr.CompiledAssembly;

object _Compiled = a.CreateInstance("ADOGuy._Evaluator");

System.Reflection.MethodInfo mi = _Compiled.GetType().GetMethod("__foo");

return mi.Invoke(_Compiled, null);

}

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