C#窗体传值实例汇总

public calss form1:Form{
    public static int A;
}
public class form2:Form{
   form1.A=1;
}

public class form1:Form{
  public int A{get;set;}
  public static Action<int> setIntADelForClass;//类的委托
  public Action<int>setIntADel   //实例的委托
  public void setintA(int a){
    A=a;
  }
  public void form_load(object sender, EventArgs e){
  setIntADelForClass=setIntA;
  setIntADel   =setIntA;
  }
}
public class form2：Form{
  public void setFom1IntA{
   form1.setIntADelForClass(10);//通过类的委托将form1 的A变量设置为10
  form1 fm1=new form1();
  fm1.setIntADel(12);//通过实例的委托将新实例fm1的A变量设置为12
  }
}

public class Form1:Form{
  public int A{get;set;}
  
   private void button1_click(object sender, EventArgs e){
    A=10;
    Form2 fm2=new Form2();
    fm2.ShowDialog(this);
   }
 
}
public class Form2：Form{
    private void button1_Click(object sender, EventArgs e)
        {
            Form1 fm = (Form1)this.Owner;
            MessageBox.Show(fm.A);//读Form1的A
            fm.A=11;//写Form1的A       
           
            
        }
}

//--------------------------------------->>--------------------Form1---------------
public partial class Form1 : Form{
     public string B //获取textbox1的text
        {
            get { return textBox1.Text; }
            set
            {
                textBox1.Text = value;
            }
        }
        public delegate void EventArgsaccept(object sender, acceptEventArgs e);//声明一个事件签名的委托
        public static event EventArgsaccept accept;//相当于实例化一个事件
        private void button1_Click(object sender, EventArgs e)
        {
            acceptEventArgs ae = new acceptEventArgs();
            ae.b = B;
            
            if (accept != null) {
                accept(this,ae);
            }
        }
    }
  
 
}
  public class acceptEventArgs : EventArgs {//封装EventArgs类，添加可传递的属性
        public  string b { get; set; }
    }
//------------------->>----------------------------------end code of form1-----------

//-------------------------------------->>---------------------------------------code of form2---
 public partial class Form2 : Form{
  private void Form2_Load(object sender, EventArgs e)
        {
            Form1.accept += Form1_accept;//为form1的事件赋值，当form1执行该事件的时候会执行该方法
        }
  void Form1_accept(object sender,acceptEventArgs e) {//实现一个相同方法签名的方法
            this.button1.Text = e.b;          
     }
}
//------------------------>>---------------

AppDomain.CurrentDomain.SetData("user", "小明");
AppDomain.CurrentDomain.GetData("user");