Real-cainiao-level tool C # Version C # cainiao-level tool

Recently I saw a C # cainiao-level tool which is written in form.Code, Re-compile and execute in the console

At that time, I thought it was very novel. I just downloaded it and checked it out. I didn't expect it to be written in F # language. There were a few cainiao in functional languages --

In the spirit of curiosity, and in order to have something to talk about at the monthly meeting, I found some information on the Internet and wrote one by myself. The operation diagram is as follows:

 

OK,ProgramIt is very simple. A new form is created on the console, and the button event of form is to call the console method and re-compile the code for execution.

The following is the part of the concatenation code in the constructor.

 ///   <Summary>           ///  Parses string Constructor  ///   </Summary>           ///   <Param name = "items"> String Array to be parsed  </Param>           Private   Void  Constructevaluator (evaluatoritem [] items ){  //  Create a C # compiler instance Icodecompiler comp = ( New  Csharpcodeprovider (). createcompiler ());  //  Compiler input parameters Compilerparameters CP = New  Compilerparameters (); CP. referencedassemblies. Add ( "  System. dll  " ); //  Add reference to assembly system. dll CP. referencedassemblies. Add ( "  System. Data. dll  " ); //  Add reference to assembly system. Data. dll CP. referencedassemblies. Add ( "  System. xml. dll  " ); // Add reference to assembly system. xml. dll CP. generateexecutable = False ; //  Do not generate executable files CP. generateinmemory = True ; //  Run in memory  Stringbuilder code = New Stringbuilder (); //  Create Code string              /*  * Add common and required reference strings */  Code. append (  "  Using system; \ n  "  ); Code. append (  "  Using system. Data; \ n  "  );  //  Code. append ("using system. Data. sqlclient; \ n ");  //  Code. append ("using system. Data. oledb; \ n ");  // Code. append ("using system. xml; \ n ");  Code. append (  "  Namespace evalguy {\ n  " ); //  The namespace of the generated code is evalguy, which is the same as that of the Code.  Code. append (  "  Public class _ evaluator {\ n  " ); //  Generate the _ evaluator class, And all executable code is run in this class              Foreach (Evaluatoritem itemIn Items) //  Traverse every executable string  {Code. appendformat (  "  Public {0} {1 }()  " , //  Add and define public function code Item. returntype. Name, //  The function return value is a type of return value defined in an executable string. Item. Name ); //  The function name is the name of the execution string defined in the executable string. Code. append ("  {\ N  " ); //  Add function start brackets                  String [] STRs = item. expression. Split ( '  ;  '  ); Code. append (  "  Object OBJ = \ "\"; \ n  "  ); Code. append (  "  Try {\ n "  );  Foreach ( String S In  STRs) {code. append (S + "  ; \ N  "  );} Code. append (  "  } \ N catch {}\ n  "  ); Code. append ( "  Return OBJ;  "  ); Code. append (  "  } \ N  " ); //  Add function ending brackets  } Code. append (  "  }}  " ); //  Add end class and end namespace brackets  // Returns the result of the compiler instance. Compilerresults Cr = Comp. compileassemblyfromsource (CP, code. tostring ()); Try  {;}  Catch  {}  If (Cr. errors. haserrors) //  If any error occurs  {Stringbuilder Error = New Stringbuilder (); //  Create an error message string Error. append ( "  An incorrect expression is compiled:  " ); //  Add error text                  Foreach (Compilererror err In Cr. Errors) //  Traverse every compilation Error  {Error. appendformat (  "  {0} \ n  " , Err. errortext ); // Added to the error text, with a line break after each error  } MessageBox. Show (  "  Compilation error:  " + Error. tostring ());  Return  ;} Assembly = Cr. compiledassembly; //  Get the assembly of the compiler instance _ Compiled = A. createinstance ( "  Evalguy. _ Evaluator  " );//  Find and declare the evalguy. _ evaluator instance through the Assembly }

The role of this toolArticleI wrote it clearly: it is useless... At least I haven't used it at work these two weeks.

 

Cainiao tool, demo