这个就是在程序中调用编译器···

最新推荐文章于 2021-05-18 04:34:14 发布

转载最新推荐文章于 2021-05-18 04:34:14 发布 · 236 阅读

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原文链接：http://www.cnblogs.com/tling091223/archive/2009/12/29/1634734.html

本文介绍了一种使用C#进行动态代码编译并利用反射机制调用编译后代码的方法。通过CSharpCodeProvider和ICodeCompiler接口，可以将字符串形式的源代码编译成程序集，再通过反射创建实例并调用其方法，实现运行时生成和执行代码的功能。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
using Microsoft.CSharp;
using Microsoft.Internal;
using Evaluator;
using System.Globalization;
using System.CodeDom;
using System.CodeDom.Compiler;

namespace xmlPathTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void btnAddNodes_Click(object sender, EventArgs e)
        {
            // 1.CSharpCodePrivoder
            CSharpCodeProvider objCSharpCodePrivoder = new CSharpCodeProvider();
            // 2.ICodeComplier
            ICodeCompiler objICodeCompiler = objCSharpCodePrivoder.CreateCompiler();
            // 3.CompilerParameters
            CompilerParameters objCompilerParameters = new CompilerParameters();
            objCompilerParameters.ReferencedAssemblies.Add("System.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Data.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Drawing.dll");
            objCompilerParameters.ReferencedAssemblies.Add("System.Xml.dll");
            objCompilerParameters.ReferencedAssemblies.Add("xmlPathTest.exe");
            objCompilerParameters.GenerateExecutable = false;
            objCompilerParameters.GenerateInMemory = true;
            // 4.CompilerResults
            CompilerResults cr = objICodeCompiler.CompileAssemblyFromSource(objCompilerParameters, CreateCode(txtFrmName.Text.Trim()));
            if (cr.Errors.HasErrors)
            {
                richTextBox1.Text = "编译错误：\r\n";
                foreach (CompilerError err in cr.Errors)
                {
                    richTextBox1.Text += err.ErrorText + "\r\n";
                }
            }
            else
            {
                // 通过反射，调用HelloWorld的实例
                Assembly objAssembly = cr.CompiledAssembly;
                object objHelloWorld = objAssembly.CreateInstance("xmlPathTest.HelloWorld");
                MethodInfo objMI = objHelloWorld.GetType().GetMethod("OutPut");
               objMI.Invoke(objHelloWorld, null);
            }
        }
        private string CreateCode(string frmName)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("using System;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Collections.Generic;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.ComponentModel;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Data;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Drawing;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Text;");
            sb.Append(Environment.NewLine);
            sb.Append("using System.Windows.Forms;");
            sb.Append(Environment.NewLine);
            sb.Append("namespace xmlPathTest");
            sb.Append(Environment.NewLine);
            sb.Append("{");
            sb.Append(Environment.NewLine);
            sb.Append("      public class HelloWorld");
            sb.Append(Environment.NewLine);
            sb.Append("      {");
            sb.Append(Environment.NewLine);
            sb.Append("          public void OutPut()");
            sb.Append(Environment.NewLine);
            sb.Append("          {");
            sb.Append(Environment.NewLine);
            sb.AppendFormat("               new xmlPathTest.{0}().Show();",frmName);
            sb.Append(Environment.NewLine);
            sb.Append("          }");
            sb.Append(Environment.NewLine);
            sb.Append("      }");
            sb.Append(Environment.NewLine);
            sb.Append("}");
            richTextBox1.Text = sb.ToString();
            return sb.ToString();

        }
    }
}

转载于:https://www.cnblogs.com/tling091223/archive/2009/12/29/1634734.html