属性

public class MyUser
    ...{
        private string name;
        private string pwd;

        public string Name
        ...{
            get
            ...{
                return this.name;
            }
            set
            ...{
                this.name = value;
            }
        }

        public string Pwd
        ...{
            get
            ...{
                return this.pwd;
            }
            set
            ...{
                this.pwd = value;
            }
        }
        public MyUser(string name, string pwd)
        ...{
            this.name = name;
            this.pwd = pwd;
        }
    }

在命名空间里添加一个类

在需要的窗体里再添加

 

public partial class Form4 : Form
    ...{
        private MyUser user;
        public MyUser LoginUser
        ...{
            get
            ...{
                return this.user;
            }
            set
            ...{
                this.user = value;
                if (this.user != null)
                ...{
                    this.textBox1.Text = this.user.Name;
                    this.textBox2.Text = this.user.Pwd;
                }
            }
        }
        public Form4()
        ...{
            InitializeComponent();
        }

        private void Form4_Load(object sender, EventArgs e)
        ...{
            if (this.user != null)
            ...{
                this.textBox1.Text = this.user.Name;
                this.textBox2.Text = this.user.Pwd;
            }
        }
    }

调用语句：

 

        private void button3_Click(object sender, EventArgs e)
        ...{
            Form4 fm2 = FormCache.GetForm("WinFormTest.Form4") as Form4;
            fm2.LoginUser = null;
            fm2.Show();

        }

        private void button4_Click(object sender, EventArgs e)
        ...{
            Form4 fm2 = FormCache.GetForm("WinFormTest.Form4") as Form4;
            fm2.LoginUser = new MyUser("这是用户名", "这里是密码");
            fm2.Show();
        }