时间:2020-10-22 22:28:32 | 栏目:.NET代码 | 点击:次
在winform 界面编程中,我们有时候要在主界面打开之前先显示登录界面,当登录界面用户信息校验正确后才打开主界面,而这时登陆界面也完成使命该功成身退了。
目前有两种方法可实现:
方法1. 隐藏登录界面
Program.cs 中代码如下:
/// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Login()); }
Login.cs 中代码如下:
/// <summary> /// login /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnLogin_Click(object sender, EventArgs e) { if (txtPassword.Text == "12345678") { UI ui = new UI(); this.Visible = false; ui.ShowDialog();//此处不可用Show() this.Dispose(); this.Close(); } else { MessageBox.Show("Password is incorrect ", "Prompt message",MessageBoxButtons.OK,MessageBoxIcon.Error); } } /// <summary> /// exit /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnExit_Click(object sender, EventArgs e) { this.Dispose(); this.Close(); }
方法2. 登录界面以 dialog形式打开,返回登录结果
Program.cs 中代码如下:
/// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Login login = new Login(); login.ShowDialog(); if (login.DialogResult == DialogResult.OK) { login.Dispose(); Application.Run(new UI()); } else if (login.DialogResult == DialogResult.Cancel) { login.Dispose(); return; } }
Login.cs 中代码如下:
/// <summary> /// login /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnLogin_Click(object sender, EventArgs e) { if (txtPassword.Text == "12345678") { this.DialogResult = DialogResult.OK; this.Dispose(); this.Close(); } else { MessageBox.Show("Password is incorrect ", "Prompt message",MessageBoxButtons.OK,MessageBoxIcon.Error); } } /// <summary> /// exit /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnExit_Click(object sender, EventArgs e) { this.DialogResult = DialogResult.Cancel; this.Dispose(); this.Close(); }