学习反射例子,调用DLL窗体及方法

创建类库,并添加新窗体,加入以下方法

public static string setText(string str)
{
    return str;
}

编译后把生成的DLL文件放入新项目的bin目录,新项目需要using System.Reflection窗口放入2个button,并添加实现

//通过反射打开Dll窗体
private void button1_Click(object sender, EventArgs e)
{
    //dll命名空间名
    string dllName = "DllDemo";
    //dll类名
    string dllClassName = "DllDemo.Form1";
    //载入并创建实例转为Form类型
    Form frm = Assembly.Load(dllName).CreateInstance(dllClassName) as Form;
    frm.ShowDialog();
}
//通过反射调用Dll中的方法
private void button2_Click(object sender, EventArgs e)
{
    //dll文件路径
    string dllName = "DllDemo";
    //dll类名
    string dllClassName = "DllDemo.Form1";
    //加载dll文件
    var assembly = Assembly.Load(dllName);
    //获取类
    Type type = assembly.GetType(dllClassName);
    //创建该类型的实例
    object obj = Activator.CreateInstance(type);
    //获取该类的方法
    string str = type.InvokeMember("setText", BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.Static, null, null, new object[] { textBox1.Text }).ToString();
    MessageBox.Show(str);

    //缩写
    string returnStr = Assembly.Load(dllName)
                      .GetType(dllClassName)
                      .InvokeMember(
                                    "setText"
                                    , BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.Static
                                    , null
                                    , null
                                    , new object[] { textBox1.Text }  //传入方法参数
                                    )
                      .ToString();
    MessageBox.Show(returnStr);

}
原文地址:https://www.cnblogs.com/liessay/p/12876553.html