1. 登錄界面的效果圖

GIF.gif

2. 登錄界面實現的功能描述

該界面主要是為指定的用戶可以更快更安全的進入商超管理系統。用戶首先選擇登錄用戶類型，然后輸入自己的用戶名和密碼點擊登錄就可以登錄相應的商超系統頁面。不同的身份類型所訪問到的頁面也是不同的

3. 登錄界面各控件的參數設置

以列表的方式，列出各個控件的重要參數設置。

label1

label2

label3

Linklabel1

comboBox1

textBox1

textBox2

button1

button2

4. 重要方法描述

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void button1_Click(object sender, EventArgs e)
    {
        if (this.comboBox1.SelectedItem.ToString() == "收銀員")
        {
            if (this.textBox1.Text == "123456789" && this.textBox2.Text == "123456")
            {
                MessageBox.Show("收銀員登錄成功");
            }
            else
            {
                MessageBox.Show("用戶名或密碼錯誤", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
    }

    private void label3_Click(object sender, EventArgs e)
    {
       
   }

    

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

    }

    private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        this.comboBox1.SelectedIndex = 0;
    }

    private void textBox1_TextChanged(object sender, EventArgs e)
    {
      
    }

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

    private void textBox2_TextChanged(object sender, EventArgs e)
    {
    }

    private void button2_Click(object sender, EventArgs e)
    {
        Application.Exit();
    }

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

    private void Form1_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)
        {
            SendKeys.Send("{tab}");
        }
    }
    }
}