动态生成类代码,CSharp代码库,德仔网

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【CSharp】动态生成类
作者:Dezai.CN / 发布于2013/1/4/ 557
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using Microsoft.CSharp;
using System.CodeDom.Compiler;
using System.CodeDom;

namespace LoadHistoricalDataFromSFI.Classes
{
    public class DynamicClassCreator
    {
        /// <summary>
        /// The provider
        /// </summary>
        private CSharpCodeProvider cSharpCodeProvider;
        /// <summary>
        /// The paras
        /// </summary>
        private CompilerParameters compilerParameters;
        /// <summary>
        /// The assembly
        /// </summary>
        private Assembly assembly;

        /// <summary>
        /// Gets the assembley.
        /// </summary>
        /// <value>
        /// The assembley.
        /// </value>
        public Assembly Assembley
        {
            get { return assembly; }
        }

        public DynamicClassCreator(List<string> properties)
        {
            Initialize(properties);
        }

        /// <summary>
        /// Create an assembly.
        /// </summary>
        /// <param name="properties">The properties.</param>
        public void Initialize(List<string> properties)
        {
            // Create Code Provider
            cSharpCodeProvider = new CSharpCodeProvider();
            // Create and Set Complier Parameters
            compilerParameters = new CompilerParameters();
            compilerParameters.GenerateExecutable = false;
            compilerParameters.GenerateInMemory = true;

            // Create dynamic sources
            StringBuilder classSource = new StringBuilder();
            classSource.Append("public   class   DynamicClass \n");
            classSource.Append("{\n");
            // Add properties
            foreach (string str in properties)
            {
                classSource.Append(propertyString(str));
            }
            classSource.Append("}");
            System.Diagnostics.Debug.WriteLine(classSource.ToString());

            // Compile
            CompilerResults compilerResults = cSharpCodeProvider.CompileAssemblyFromSource(compilerParameters, classSource.ToString());
            // Get assembly
            assembly = compilerResults.CompiledAssembly;
        }

        /// <summary>
        /// Properties the string.
        /// </summary>
        /// <param name="propertyName">Name of the property.</param>
        /// <returns></returns>
        private string propertyString(string propertyName)
        {
            StringBuilder sbProperty = new StringBuilder();
            sbProperty.Append(" private   string   _" + propertyName + "   =   string.Empty;\n");
            sbProperty.Append(" public   string   " + "" + propertyName + "\n");
            sbProperty.Append(" {\n");
            sbProperty.Append(" get{   return   _" + propertyName + ";}   \n");
            sbProperty.Append(" set{   _" + propertyName + "   =   value;   }\n");
            sbProperty.Append(" }");
            return sbProperty.ToString();
        }
    }
}

调用:
dynamicClassCreator = new DynamicClassCreator(csvFile.Headers);
object obj = dynamicClassCreator.Assembley.CreateInstance("DynamicClass");

属性编辑
/// <summary>
/// Reflections the set property.
/// </summary>
/// <param name="values">The values.</param>
/// <returns></returns>
public static bool ReflectionSetProperty(object obj, List<string> values)
{
           PropertyInfo[] propertyInfo = obj.GetType().GetProperties();

            if (propertyInfo.Length != values.Count)
            {
                return false;
            }

            for (int i = 0; i < propertyInfo.Length; i++)
            {
                if (propertyInfo[i].CanWrite)
                {
                    propertyInfo[i].SetValue(obj, values[i], null);
                }
            }

            return true;
}
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　动态生成类　
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