Mutual call between Lua and C ＃

C# And Lua The interaction of is mainly by Lua Officially provided LuaInterface.dll Library implementation of .

What is? LuaInterface

 LuaInterface Including two dynamic link library files , One is luaInterface.dll, stay C# In the operation Lua One of the necessary dependent files is Luanet.dll,

C# And lua Interaction principle :

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C# And Lua The interaction process ：

  C# Call Lua : from C# File calls Lua Parser bottom layer Luanet.dll library （ from C Language writing ）, Again by dll File execution corresponding Lua file ;

C# And Lua Interaction principle :
  C# And Lua Interaction is mainly realized through virtual stack , The index of the stack is divided into positive and negative numbers , If the index is positive , be 1 Indicates the bottom of the stack , If the index is negative , be -1 Represents the top of the stack .
 
  Lua Call C#: Mr Into C# Corresponding to the source file Wrap File or write C# Corresponding to the source file c modular , Then pass the contents of the source file Wrap Documents or C Module registered to Lua Interpreter , Then from Lua To call the function of this module .

Explain from the code file ：
 

lua call CSharp The process ：
lua->wrap->C#
Mr Into Wrap file （ Intermediate document / Adaptation file ）,wrap File field method , Sign up to lua In the virtual machine （ Interpreter luajit）, then lua adopt wrap It can be adjusted C# 了

Or in config You can also add the corresponding type to the file
CSharp call Lua The process ：
C# Generate Bridge file ,Bridge transfer dll file （dll Yes, it is C The library of writing ）, First call lua in dll file , from dll File execution lua Code
C#->Bridge->dll->Lua  OR   C#->dll->Lua

Explain from memory ： To put it bluntly, it is to operate the stack
C# Call Lua：C# Put the request or data on the top of the stack , then lua Take the data from the top of the stack , stay lua Make corresponding treatment in （ Inquire about , change ）, Then put the processing result back to the top of the stack , Last C# Then take it out from the top of the stack lua Processed data , To complete the interaction .

 

  After creating a new project, put the LUAInterface.dll and luanet.dll Drag in C# In the new project , Add... To the reference luainterface References to  

stay C# Execute access in Lua Code

    Lua lua = new Lua();  // establish Lua Parser

    lua["num"]=2;  // Define a num

    lua["str"]="a string";  // Define a string

    lua.newTable("tab");  // Create a table  tab={}

 

obtain lua Variables in environment

   doublenum = (double)lua["num"];

   string str = (string)lua["str"];

 

stay C# In the implementation of Lua Script files , Or script string

   lua.DoFile("script.lua");// perform script.lua Script . The script should be consistent with C# The project is under the same directory ,lua The code format is ansi Format ; The folder should be placed C# Under the project of       debu In the folder

   lua.DoString("num=2");

   lua.DoString("str='a string'");

   object[] retVals = lua.DoString("return num,str");

   

In hot update , Just write an analysis lua Script code , then c# The code doesn't need to change , It only needs modify lua The script is good , adopt lua Script controls game logic .

 

    stay CLR One of them C# Method register into Lua

  // Register ordinary methods in a class

    The first parameter is in l After the conversion lua Method name in , The second is C# Class name in , The third is C# Method name in

Lua lua = new Lua(); 
Program p=new Program(); 
lua.RegisterFunction("LuaMethod", p, p.GetType().GetMethod("CLRMethod")); 
lua.DoString("LuaMethod()"); 
Console.ReadKey(); 

public void CLRMethod() 
{             
   Console.WriteLine(" hold C# Method is registered LUA");
}

   

// Register the static method of a class

 Lua lua = new Lua();
            lua.RegisterFunction("CToLua", null, typeof(Program).GetMethod("MyStaticMethod"));
            lua.DoString("CToLua()");
            Console.ReadKey();
 public static void MyStaticMethod()
        {
            Console.WriteLine(" hold C# The static method of lua");
        }

 

stay Lua Use in editor c# Class in

   require“luanet"   Import and stock in , You can use the methods in the Library ,

   -- load CLR The type of 、 Instantiation CLR object

   Lua The code in ,lua call C# Class       luainterface.exe    luanet.exe   Import project's debug Under the folder

require "luanet"
luanet.load_assembly("System")// Load assembly 
num=luanet.import_type("System.Int32")// Load type 
print(num) 

C# The code in ,C# call lua Method output ;

  Lua lua = new Lua();
            lua.DoFile("LuaUseScript.lua");
            Console.ReadKey(); 

 

stay Lua Use in C# When creating objects for classes in , It will automatically match the most appropriate construction method

 

stay Lua Medium visit C# Properties and methods in

Lua In the code , visit C# The way and access of the properties of the object table The key index is the same as , such as obj.name perhaps obj["name"]

Lua In the code , visit C# Methods and calls of ordinary functions of objects table The function is the same as , such as obj:method1()

luanet.load_assembly("lelelua")
Program=luanet.import_type("lelelua.Program")
program1=Program()
print(program1.name)
program1:TestMethod() 

  public string name = " Lele loves learning ";
        public void TestMethod()
        {
            Console.WriteLine("C# The method in ");
        }

stay Lua Medium visit C# The method in - A special case , Notice that there are two return values

luanet.load_assembly("lelelua")
Program=luanet.import_type("lelelua.Program")
program1=Program()
void,strlength=program1:TestOut("leleaixuexi")
print(strlength) 

   public void TestOut(string name, out int count)
   {
      count = name.Length;
   }

When there is out or ref When parameters are ,out Parameters and ref Parameters are returned with the return value of the function , And when called ,out Parameters don't need to be passed in

ref Parameter needs to be passed in , Return to one table There are two values (value1,value2)

    When there are overloaded functions , The calling function will automatically match the first function that can be matched

    have access to get_method_bysig Function to get C# Function usage of the specified parameter of the specified class in

   luaMethod= get_method_bysig(Obj,"CSharpMethod","System.String")

           luaMethod("siki")

 

stay Lua Register in C# Event delegation in （event delegate）

    stay Lua Pass through Add Methods or Remove How to put a Lua Function registration or logout from C# Event delegation in

     function method()

     end

     obj.SomeEvent:Add(methodname( No quotes ))