常用控件

标签，文本，按钮，列表框，组合框等的使用

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;namespace 学生成绩管理系统
{internal static class Program{/// <summary>/// 应用程序的主入口点。/// </summary>[STAThread]static void Main(){Application.EnableVisualStyles();Application.SetCompatibleTextRenderingDefault(false);Application.Run(new FormWelcome());}}
}

FormWelcome.cs

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 学生成绩管理系统
{public partial class FormWelcome : Form{public FormWelcome(){InitializeComponent();}private void label1_Click(object sender, EventArgs e){}private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e){linkLabel1.LinkVisited = true;FormLogin loginForm = new FormLogin();loginForm.Show();this.Hide();}private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e){labelWelcome.Visible = true;// labelWelcome.Show();}private void linkLabel3_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e){labelWelcome.Visible = false;// labelWelcome.Hide();}private void FormWelcome_Load(object sender, EventArgs e){}  }
}

FormLogin.cs

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 学生成绩管理系统
{public partial class FormLogin : Form{public FormLogin(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){if (textBoxUserName.Text == string.Empty || textBoxPassWord.Text == string.Empty){MessageBox.Show("信息禁止为空！", "登录提示");textBoxUserName.Clear();textBoxPassWord.Clear();textBoxPassWord.Focus();return;}if (!textBoxUserName.Text.Equals("admin") || !textBoxPassWord.Text.Equals("admin")){MessageBox.Show("用户名或密码错误!", "登录提示");textBoxUserName.Clear();textBoxPassWord.Clear();textBoxPassWord.Focus();return;}else {MessageBox.Show("欢迎您登录本系统!", "消息提示");FormMenu formMenu = new FormMenu();formMenu.Show(this);textBoxUserName.Clear();textBoxPassWord.Clear();textBoxPassWord.Focus();//groupBox1.Hide();this.Hide();             }}private void button2_Click(object sender, EventArgs e){textBoxUserName.Clear();textBoxPassWord.Clear();textBoxPassWord.Focus();}private void FormLogin_Load(object sender, EventArgs e){}}
}

FormMenu.cs

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 学生成绩管理系统
{public partial class FormMenu : Form{public FormMenu(){InitializeComponent();}private void listBox1_SelectedIndexChanged(object sender, EventArgs e){MessageBox.Show("您选择的部门是:" + listBox1.SelectedItem.ToString() +",位列第" + listBox1.SelectedIndex.ToString(), "提示信息");}private void comboBox1_SelectedIndexChanged(object sender, EventArgs e){MessageBox.Show("已选择：" + comboBox1.SelectedItem.ToString() + "， 位列："+ comboBox1.SelectedIndex.ToString(), "提示信息");}private void FormMenu_Load(object sender, EventArgs e){this.listBox1.Items.Add("软件部");this.listBox1.Items.Add("硬件部");this.listBox1.Items.Add("财务部");this.listBox1.Items.Add("人事部");this.comboBox1.Items.Add("产品部");this.comboBox1.Items.Add("销售部");this.comboBox1.Items.Add("生产部");//this.comboBox1.SelectedIndex = 0;}}
}

程序运行效果：