在“主窗体”中使用ShowDialog()方法显示“登陆窗体”,并通过“登陆窗体”的DialogResult告知“主窗体”是否登陆成功。
1.1 主窗体:
private void FrmMain_Load(object sender, EventArgs e){ FrmLogin frm = new FrmLogin(); if (frm.ShowDialog() == DialogResult.OK) { // 执行主窗体的一些初始化内容 } else { this.Close(); // 关闭主窗体 }}
1.2 登陆窗体:
private vode btn_Login_Click(object sender, EventArgs e){ this.DialogResult = DialogResult.OK;}
“登陆窗体”在执行完毕后,需要将登陆用的信息传递给“主窗体”,其传递的过程就是“暂时”将用户信息存在“主窗体”可以获取的“地方”,根据“地方”不同可以有一下几种方案。
新建 User.cs
public class User { public string username; public User(string username) { this.username = username; }}
2.1.1 登陆窗体:
private vode btn_Login_Click(object sender, EventArgs e){ this.Tag = new User('rianman'); this.DialogResult = DialogResult.OK;}
2.1.2 主窗体:
private void FrmMain_Load(object sender, EventArgs e){ FrmLogin frm = new FrmLogin(); if (frm.ShowDialog() == DialogResult.OK) { User user = frm.Tag as User; // 此处获取“登陆窗体”传递过来的数据 } else { this.Close(); // 关闭主窗体 }}
2.2.1 登陆窗体:
private vode btn_Login_Click(object sender, EventArgs e){ FrmMain main this.Owner as FrmMain; main.Tag = new User("rainman"); this.DialogResult = DialogResult.OK;}
2.2.2 主窗体:
private void FrmMain_Load(object sender, EventArgs e){ FrmLogin frm = new FrmLogin(); if (frm.ShowDialog() == DialogResult.OK) { User user = this.Tag as User; // 此处获取“登陆窗体”传递过来的数据 } else { this.Close(); // 关闭主窗体 }}
2.3.1 新建Context.cs
public class Context{ public static User LoginUser = null;}
2.3.2 登陆窗体:
private vode btn_Login_Click(object sender, EventArgs e){ Context.LoginUser = user; this.DialogResult = DialogResult.OK;}
2.3.3 主窗体:
private void FrmMain_Load(object sender, EventArgs e){ FrmLogin frm = new FrmLogin(); if (frm.ShowDialog() == DialogResult.OK) { User user = Context.LoginUser; // 此处获取“登陆窗体”传递过来的数据 } else { this.Close(); // 关闭主窗体 }}
2.4.1 登陆窗体:
private vode btn_Login_Click(object sender, EventArgs e){ FrmMain main = this.Owner as FrmMain; main.LoginUser = new User("rainman"); this.DialogResult = DialogResult.OK;}
2.4.2 主窗体:
public user LoginUser { get; set; }private void FrmMain_Load(object sender, EventArgs e){ FrmLogin frm = new FrmLogin(); if (frm.ShowDialog() == DialogResult.OK) { User user = this.LoginUser; // 此处获取“登陆窗体”传递过来的数据 } else { this.Close(); // 关闭主窗体 }}
联系客服