C# winform 打開主界面並關閉登陸界面

在winform 界面編程中,咱們有時候要在主界面打開以前先顯示登陸界面,當登陸界面用戶信息校驗正確後纔打開主界面,而這時登錄界面也完成使命該功成身退了。html

目前有兩種方法可實現:編程

方法1. 隱藏登陸界面post

    Program.cs 中代碼以下:ui

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        /// <summary>
        /// 應用程序的主入口點。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Login());
        }
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    Login.cs 中代碼以下:this

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        /// <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();//此處不可用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();
        }
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方法2. 登陸界面以 dialog形式打開,返回登陸結果 spa

    Program.cs 中代碼以下:code

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        /// <summary>
        /// 應用程序的主入口點。
        /// </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; 
            }
        }
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    Login.cs 中代碼以下:orm

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        /// <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();
        }
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出處:https://www.cnblogs.com/Waming-zhen/p/6560886.htmlhtm

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