让C#语言充当自身脚本！

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本文来自于csdn，文章主要介绍了在.NET平台中基本的动态编译并执行代码的步骤及改进的执行过程。

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using Microsoft.CSharp;

using System.CodeDom.Compiler;

using System.Reflection;

namespace DynamicCompileBase

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

//get the code to compile

string strSourceCode = this.txtSource.Text;

// 1.Create a new CSharpCodePrivoder instance

CSharpCodeProvider objCSharpCodePrivoder =

new CSharpCodeProvider();

// 2.Sets the runtime compiling parameters by

crating a new CompilerParameters instance

CompilerParameters objCompilerParameters =

new CompilerParameters();

objCompilerParameters.ReferencedAssemblies.Add

("System.dll");

objCompilerParameters.ReferencedAssemblies.Add

("System.Windows.Forms.dll");

objCompilerParameters.GenerateInMemory = true;

// 3.CompilerResults: Complile the code snippet

by calling a method from the provider

CompilerResults cr = objCSharpCodePrivoder.CompileAssemblyFromSource

(objCompilerParameters, strSourceCode);

if (cr.Errors.HasErrors)

{

string strErrorMsg = cr.Errors.Count.ToString()

+ " Errors:";

for (int x = 0; x < cr.Errors.Count; x++)

{

strErrorMsg = strErrorMsg + "/r/nLine: " +

cr.Errors[x].Line.ToString() + " - " +

cr.Errors[x].ErrorText;

}

this.txtResult.Text = strErrorMsg;

MessageBox.Show("There were build erros, please

modify your code.", "Compiling Error");

return;

}

// 4. Invoke the method by using Reflection

Assembly objAssembly = cr.CompiledAssembly;

object objClass = objAssembly.CreateInstance("Dynamicly.HelloWorld");

if (objClass == null)

{

this.txtResult.Text = "Error: " + "Couldn't load class.";

return;

}

object[] objCodeParms = new object[1];

objCodeParms[0] = "Allan.";

string strResult = (string)objClass.GetType()

.InvokeMember( "GetTime", BindingFlags.InvokeMethod,

null, objClass, objCodeParms);

this.txtResult.Text = strResult;

}

}

}

using System;

namespace Dynamicly

{

public class HelloWorld

{

public string GetTime(string strName)

{

return "Welcome " + strName + ", Check in at " + System.DateTime.Now.ToString();

}

}

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Reflection;

namespace RemoteAccess

{

/// <summary>

/// Interface that can be run over the remote AppDomain boundary.

/// </summary>

public interface IRemoteInterface

{

object Invoke(string lcMethod, object[] Parameters);

}

/// <summary>

/// Factory class to create objects exposing IRemoteInterface

/// </summary>

public class RemoteLoaderFactory : MarshalByRefObject

{

private const BindingFlags bfi = BindingFlags.Instance | BindingFlags.Public | BindingFlags.CreateInstance;

public RemoteLoaderFactory() { }

public IRemoteInterface Create(string assemblyFile, string typeName, object[] constructArgs)

{

return (IRemoteInterface)Activator.CreateInstanceFrom(

assemblyFile, typeName, false, bfi, null, constructArgs,

null, null, null).Unwrap();

}

}

}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using Microsoft.CSharp;

using System.CodeDom.Compiler;

using System.Reflection;

using RemoteAccess;

namespace DynamicCompileAppDomain

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

// get the code to compile

string strSourceCode = this.txtSource.Text;

// 0. Create an addtional AppDomain

AppDomainSetup objSetup = new AppDomainSetup();

objSetup.ApplicationBase = AppDomain.CurrentDomain

.BaseDirectory;

AppDomain objAppDomain = AppDomain.CreateDomain

("MyAppDomain", null, objSetup);

// 1.Create a new CSharpCodePrivoder instance

CSharpCodeProvider objCSharpCodePrivoder = new

CSharpCodeProvider();

// 2.Sets the runtime compiling parameters by

crating a new CompilerParameters instance

CompilerParameters objCompilerParameters = new

CompilerParameters();

objCompilerParameters.ReferencedAssemblies.Add

("System.dll");

objCompilerParameters.ReferencedAssemblies.Add

("System.Windows.Forms.dll");

// Load the remote loader interface

objCompilerParameters.ReferencedAssemblies.

Add("RemoteAccess.dll");

// Load the resulting assembly into memory

objCompilerParameters.GenerateInMemory = false;

objCompilerParameters.OutputAssembly =

"DynamicalCode.dll";

// 3.CompilerResults: Complile the code snippet

by calling a method from the provider

CompilerResults cr = objCSharpCodePrivoder.

CompileAssemblyFromSource(objCompilerParameters,

strSourceCode);

if (cr.Errors.HasErrors)

{

string strErrorMsg = cr.Errors.Count.ToString()

+ " Errors:";

for (int x = 0; x < cr.Errors.Count; x++)

{

strErrorMsg = strErrorMsg + "/r/nLine: " +

cr.Errors[x].Line.ToString() + " - " +

cr.Errors[x].ErrorText;

}

this.txtResult.Text = strErrorMsg;

MessageBox.Show("There were build erros,

please modify your code.", "Compiling Error");

return;

}

// 4. Invoke the method by using Reflection

RemoteLoaderFactory factory = (RemoteLoaderFactory)objAppDomain.CreateInstance

("RemoteAccess", "RemoteAccess.RemoteLoaderFactory").Unwrap();

// with help of factory, create a real 'LiveClass'

instance

object objObject = factory.Create("DynamicalCode.dll", "Dynamicly.HelloWorld", null);

if (objObject == null)

{

this.txtResult.Text = "Error: " + "Couldn't load class.";

return;

}

// *** Cast object to remote interface, avoid

loading type info

IRemoteInterface objRemote = (IRemoteInterface)objObject;

object[] objCodeParms = new object[1];

objCodeParms[0] = "Allan.";

string strResult = (string)objRemote.Invoke

("GetTime", objCodeParms);

this.txtResult.Text = strResult;

//Dispose the objects and unload the generated DLLs.

objRemote = null;

AppDomain.Unload(objAppDomain);

System.IO.File.Delete("DynamicalCode.dll");

}

}

}

using System;

using System.Reflection;

using RemoteAccess;

namespace Dynamicly

{

public class HelloWorld : MarshalByRefObject,IRemoteInterface

{

public object Invoke(string strMethod,object[] Parameters)

{

return this.GetType().InvokeMember(strMethod, BindingFlags.InvokeMethod,null,this,Parameters);

}

public string GetTime(string strName)

{

return "Welcome " + strName + ", Check in at " + System.DateTime.Now.ToString();

}

}

}