1.登陆界面截图

界面截屏.gif

2.功能描述

实现收银员和库管员通过输入账号和密码登陆，正确显示登陆成功，失败显示登陆失败，点击推出就退出登陆界面。

控件

label1

label2

label3

Linklabel1

comboBox1

textBox1

textBox2

button1

button2

5.代码

        {
            if (textBox1.Text == "123456" && textBox2.Text == "123456")
                MessageBox.Show("登陆成功", "提示");
            else
                MessageBox.Show("用户名或密码错误", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Error);
        }

 private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Enter)
            {
                SendKeys.Send("{tab}");
            }
        }

        private void textBox2_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Enter)
            {
                this.button1_Click(sender, e);
            }
        }

        private void textBox1_Enter(object sender, EventArgs e)
        {
            ((TextBox)sender).SelectAll();
        }

        private void textBox2_Enter(object sender, EventArgs e)
        {
            ((TextBox)sender).SelectAll();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.comboBox1.SelectedIndex = 0;
        }