quanxian.cs

这是一个考勤系统大家多多指教

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

namespace kaoqin.user
{
    public partial class quanxian : Form
    {
        public quanxian()
        {
            InitializeComponent();
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }

        private void quanxian_Load(object sender, EventArgs e)
        {
             BindData();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (this.listBox1.SelectedIndex == -1)
            {
                MessageBox.Show("请选择一个考勤人员！");
                return;
            }
            if (this.listBox2.SelectedIndex == -1)
            {
                MessageBox.Show("请选择一个班级！");
                return;
            }
            string name = this.listBox1.SelectedItem.ToString();
            string sql = "delete quanxian where kaoqinID=" + DB.getID("select kaoqinID from [user] where name='" + name + "'") ;
            DB.executeSql(sql);
            for (int i = 0; i < this.listBox3.Items.Count; i++)
            {
                string name1 = this.listBox1.SelectedItem.ToString();
                string name2 = this.listBox2.SelectedItem.ToString();
                string kaoqinID = DB.getID("select kaoqinID from [user] where name='"+name1+"'");
                string classID = DB.getID("select classID from class where className='"+name2+"'");
                sql = "insert into quanxian values('"+classID+"','"+kaoqinID+"')";
                DB.executeSql(sql);
            }
            MessageBox.Show("操作成功！");
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (this.listBox1.SelectedIndex == -1)
            {
                MessageBox.Show("请选择一个考勤人员！");
                return;
            }
            if (this.listBox2.SelectedIndex == -1)
            {
                MessageBox.Show("请选择一个班级！");
                return;
            }
            if (this.listBox3.Items.IndexOf(this.listBox2.SelectedItem.ToString()) != -1)
            {
                MessageBox.Show("班级" + this.listBox2.SelectedItem.ToString()+"已存在！");
                return;               
            }
            this.listBox3.Items.Add(this.listBox2.SelectedItem.ToString());
        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (this.listBox3.SelectedIndex == -1)
            {
                MessageBox.Show("请选择一个考勤班级！");
                return;
            }
            this.listBox3.Items.RemoveAt(this.listBox3.SelectedIndex);
        }

        private void BindData()
        {
            string sql = "select * from [user]";
            DataTable dt = DB.getTable(sql);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                this.listBox1.Items.Add(dt.Rows[i]["name"].ToString().Trim());
            }
            sql="select * from class";
            dt.Clear();
            dt = DB.getTable(sql);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                this.listBox2.Items.Add(dt.Rows[i]["className"].ToString().Trim());
            }
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if(this.listBox1.SelectedIndex==-1)
            {
                return;
            }
            this.listBox3.Items.Clear();
            this.listBox2.SelectedIndex = -1;
            string sql = "select className from class where classID in (select classID from quanxian where kaoqinID in"+
                "(select kaoqinID from [user] where name='"+
                this.listBox1.SelectedItem.ToString()+"'))";
            DataTable dt = DB.getTable(sql);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                this.listBox3.Items.Add(dt.Rows[i]["className"].ToString());
            }
        }

    }
}