C#在运行时动态创建类型

C# 在运行时动态的创建类型，这里是通过动态生成C#源代码，然后通过编译器编译成程序集的方式实现动态创建类型

publicstaticAssembly NewAssembly()

{//创建编译器实例。PRovider =newCSharpCodeProvider();//设置编译参数。cp =newCompilerParameters();

cp.GenerateExecutable=false;

cp.GenerateInMemory=true;//Generate an executable instead of//a class library.//cp.GenerateExecutable = true;//Set the assembly file name to generate.cp.OutputAssembly ="c:\\1.dll";//Generate debug information.cp.IncludeDebugInformation =true;//Save the assembly as a physical file.cp.GenerateInMemory =false;//Set the level at which the compiler//should start displaying warnings.cp.WarningLevel =3;//Set whether to treat all warnings as errors.cp.TreatWarningsAsErrors =false;//Set compiler argument to optimize output.cp.CompilerOptions ="/optimize";

cp.ReferencedAssemblies.Add("System.dll");//cp.ReferencedAssemblies.Add("System.Core.dll");cp.ReferencedAssemblies.Add("System.Data.dll");//cp.ReferencedAssemblies.Add("System.Data.DataSetExtensions.dll");cp.ReferencedAssemblies.Add("System.Deployment.dll");

cp.ReferencedAssemblies.Add("System.Design.dll");

cp.ReferencedAssemblies.Add("System.Drawing.dll");

cp.ReferencedAssemblies.Add("System.Windows.Forms.dll");//创建动态代码。StringBuilder classSource=newStringBuilder();

classSource.Append("using System;using System.Windows.Forms;\npublic class DynamicClass: UserControl \n");

classSource.Append("{\n");

classSource.Append("public DynamicClass()\n{\nInitializeComponent();\nConsole.WriteLine(\"hello\");}\n");

classSource.Append("private System.ComponentModel.IContainer components = null;\nprotected override void Dispose(bool disposing)\n{\n");

classSource.Append("if (disposing && (components != null)){components.Dispose();}base.Dispose(disposing);\n}\n");

classSource.Append("private void InitializeComponent(){\nthis.SuspendLayout();this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);");

classSource.Append("this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;this.Name = \"DynamicClass\";this.Size = new System.Drawing.Size(112, 74);this.ResumeLayout(false);\n}");//创建属性。/*************************在这里改成需要的属性******************************/classSource.Append(propertyString("aaa"));

classSource.Append(propertyString("bbb"));

classSource.Append(propertyString("ccc"));

classSource.Append("}");

System.Diagnostics.Debug.WriteLine(classSource.ToString());//编译代码。CompilerResults result =provider.CompileAssemblyFromSource(cp, classSource.ToString());if(result.Errors.Count >0)

{for(inti =0; i < result.Errors.Count; i ++)

Console.WriteLine(result.Errors[ i]);

Console.WriteLine("error");returnnull;

}//获取编译后的程序集。Assembly assembly =result.CompiledAssembly;returnassembly;

}privatestaticstringpropertyString(stringpropertyName)

{

StringBuilder sbProperty=newStringBuilder();

sbProperty.Append("private int _"+ propertyName +"= 0;\n");

sbProperty.Append("public int"+""+ propertyName +"\n");

sbProperty.Append("{\n");

sbProperty.Append("get{ return _"+ propertyName +";} \n");

sbProperty.Append("set{ _"+ propertyName +"= value; }\n");

sbProperty.Append("}");returnsbProperty.ToString();

}