C#利用反射动态调用DLL并返回结果,和获取程序集的信息

时间:2023-03-09 05:40:21
C#利用反射动态调用DLL并返回结果,和获取程序集的信息

反射的基本概念: .Net Framework 中提供了反射机制,可以再加载程序运行时,动态获取和加载程序集,并且可以获取到程序集的信息

创建Assembly和Entity两个程序集,在Assembly中添加Entity引用,如下图:

C#利用反射动态调用DLL并返回结果,和获取程序集的信息

namespace Entity
{
public class GetData
{
public static SIMPEntities SIMP = new SIMPEntities(); /// <summary>
/// 查询方法--返回序列化json
/// </summary>
/// <returns></returns>
public string GetResule()
{
JavaScriptSerializer Serialize = new JavaScriptSerializer();
var list = SIMP.Sys_Employee
.Select(a => new { id = a.EmpId, EmpName = a.EmpName, PositionName = (a.Sys_Position!=null)?a.Sys_Position.PositionName:"无" })
.ToList();
return Serialize.Serialize(list);
}
}
}
namespace AssemblyTest
{
class Program
{
private static Program pro = new Program();
static void Main(string[] args)
{
pro.GetAssemblyInfo(); pro.LoadAssembly();
Console.ReadLine();
}
/// <summary>
/// 动态读取DLL,执行其中的方法
/// </summary>
public void LoadAssembly()
{
//DLL所在的绝对路径
Assembly assembly = Assembly.LoadFrom(AppDomain.CurrentDomain.BaseDirectory + "Entity.dll");
//注意写法:程序集.类名
Type type = assembly.GetType("Entity.GetData");
//获取类中的公共方法GetResule
MethodInfo methed = type.GetMethod("GetResule");
//创建对象的实例
object instance = System.Activator.CreateInstance(type);
//执行方法 new object[]为方法中的参数
object result = methed.Invoke(instance, new object[] { });
}
/// <summary>
/// //获取程序集信息
/// </summary>
public void GetAssemblyInfo()
{
Type type = typeof(Program);
Assembly assembly = Assembly.GetExecutingAssembly();
Console.WriteLine("命名空间:{0}", type.Namespace);
Console.WriteLine("程序集:{0}", type.Assembly);
Console.WriteLine("类的名字{0}", type.Name);
Console.WriteLine("类的全部名字{0}", type.FullName);
Console.WriteLine("基类:{0}", type.BaseType);
Console.WriteLine("----------------------------");
Console.WriteLine("程序集的名称:{0}", assembly.GetName());
Console.WriteLine("程序集的全名:{0}", assembly.FullName);
Console.WriteLine("程序集的版本:{0}", assembly.GetName().Version);
Console.WriteLine("程序集的位置:{0}", assembly.Location);
Console.WriteLine("程序集所在目录:{0}", AppDomain.CurrentDomain.BaseDirectory);
}
}
}