student.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.stu
{
    public partial class student : Form
    {
        public student()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (this.radioButton1.Checked == true)
            {
                Add();
            }
            else if(this.radioButton2.Checked == true)
            {
                Del();
            }
            else if(this.radioButton3.Checked == true)
            {
                Mod();
            }
            else
            {
                Query();
            }
        }

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

        private void radioButton1_CheckedChanged(object sender, EventArgs e)
        {
            if (this.radioButton1.Checked == true)
            {
                this.setDefault();
            }
        }

        private void radioButton2_CheckedChanged(object sender, EventArgs e)
        {
            if (this.radioButton2.Checked == true)
            {
                this.groupBox4.Enabled = false;
                this.BindGrid();
            }
            else
            {
                this.groupBox4.Enabled = true;
            }
        }

        private void radioButton3_CheckedChanged(object sender, EventArgs e)
        {
            if (this.radioButton3.Checked == true)
            {
                BindGrid();
            }
        }

      private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
       
        }

        private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

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

        private void button3_Click(object sender, EventArgs e)
        {
            this.Query();
        }

        private void BindData()
        {
            this.comboBox1.Items.Clear();
            string sql = "select * from depart";
            DataTable dt = DB.getTable(sql);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                this.comboBox1.Items.Add(dt.Rows[i]["departName"].ToString().Trim());
            }

            sql = "select * from class ";
            dt.Clear();
            dt = DB.getTable(sql);
            for (int i = 0; i < dt.Rows.Count; i++)
            {
                this.comboBox2.Items.Add(dt.Rows[i]["className"].ToString());
            }
        }

        private void Add()
        {
            if (this.comboBox1.SelectedIndex == -1)
            {
                MessageBox.Show("请选择系部！");
                this.comboBox1.Focus();
                return;
            }
            if (this.comboBox2.SelectedIndex == -1)
            {
                MessageBox.Show("请选择班级！");
                this.comboBox2.Focus();
                return;
            }
            if (this.textBox1.Text.Trim() == "")
            {
                MessageBox.Show("请填写学生姓名!");
                this.textBox1.Focus();
                return;
            }
            if (this.textBox2.Text.Trim() == "")
            {
                MessageBox.Show("请填写学生学号!");
                this.textBox2.Focus();
                return;
            }
            if (this.radioButton5.Checked != true && this.radioButton6.Checked != true)
            {
                MessageBox.Show("请选择性别!");
                this.radioButton5.Focus();
                return;
            }

            string sql = "select * from vwStudent where xuehao='"+this.textBox2.Text.Trim()
                        +"' and name='"+this.textBox1.Text.Trim()+"' and className='"+this.comboBox2.SelectedItem.ToString()
                        +"' and departName='"+this.comboBox1.SelectedItem.ToString()+"'";
            DataTable dt = DB.getTable(sql);
            if (dt.Rows.Count != 0)
            {
                this.dataGrid1.DataSource = dt;
                MessageBox.Show("学生" + this.textBox1.Text.Trim() +"已存在!");
                return;
            }
            sql = "select classID from class where className='" + this.comboBox2.SelectedItem.ToString() + "'";
            string claID = DB.getID(sql);
            string xh = this.textBox2.Text.Trim();
            string name = this.textBox1.Text.Trim();
            string sex = "男";
            if (this.radioButton6.Checked == true)
            {
                sex = "女";
            }
           
            sql = "insert into student values('"+xh+"','"+name+"','"+sex+"','"+claID+"')";
            if (DB.executeSql(sql))
            {
                MessageBox.Show("操作成功!");
                sql = "select * from vwStudent where className='" + this.comboBox2.SelectedItem.ToString()
                        + "' and departName='" + this.comboBox1.SelectedItem.ToString() + "'";
                dt.Clear();
                dt = DB.getTable(sql);
                this.dataGrid1.DataSource = dt;
                this.setDefault();
            }
            else
            {
                MessageBox.Show("操作失败!");
            }
            
        }
        private void Mod()
        {
            if (this.lblID.Text == "")
            {
                MessageBox.Show("请选择一个要修改的学生！");
                return;
            }

            if (this.comboBox1.SelectedIndex == -1)
            {
                MessageBox.Show("请选择系部！");
                this.comboBox1.Focus();
                return;
            }
            if (this.comboBox2.SelectedIndex == -1)
            {
                MessageBox.Show("请选择班级！");
                this.comboBox2.Focus();
                return;
            }
            if (this.textBox1.Text.Trim() == "")
            {
                MessageBox.Show("请填写学生姓名!");
                this.textBox1.Focus();
                return;
            }
            if (this.textBox2.Text.Trim() == "")
            {
                MessageBox.Show("请填写学生学号!");
                this.textBox2.Focus();
                return;
            }
            if (this.radioButton5.Checked != true && this.radioButton6.Checked != true)
            {
                MessageBox.Show("请选择性别!");
                this.radioButton5.Focus();
                return;
            }
            string s="男";
            if(this.radioButton6.Checked==true)
            {
                s="女";
            }

            string sql = "select * from vwStudent where xuehao='" + this.textBox2.Text.Trim()
                        + "' and name='" + this.textBox1.Text.Trim() + "' and className='" + this.comboBox2.SelectedItem.ToString()
                        + "' and departName='" + this.comboBox1.SelectedItem.ToString() + "' and sex='"+s+"'";
            DataTable dt = DB.getTable(sql);
            if (dt.Rows.Count != 0)
            {
                this.dataGrid1.DataSource = dt;
                MessageBox.Show("学生" + this.textBox1.Text.Trim() + "已存在!");
                return;
            }
            sql = "select classID from class where className='" + this.comboBox2.SelectedItem.ToString() + "'";
            string claID = DB.getID(sql);
            string xh = this.textBox2.Text.Trim();
            string name = this.textBox1.Text.Trim();
            string sex = "男";
            if (this.radioButton6.Checked == true)
            {
                sex = "女";
            }

            sql = "update student set xuehao='" + xh + "', name='" + name + "', sex='" + sex + "',classID='" + claID + "' where studentID='" + this.lblID.Text+"'";
            if (DB.executeSql(sql))
            {
                MessageBox.Show("操作成功!");
                sql = "select * from vwStudent where className='" + this.comboBox2.SelectedItem.ToString()
                        + "' and departName='" + this.comboBox1.SelectedItem.ToString() + "'";
                dt.Clear();
                dt = DB.getTable(sql);
                this.dataGrid1.DataSource = dt;
            }
            else
            {
                MessageBox.Show("操作失败!");
            }
            
        }
        private void Del()
        {
            if (this.lblID.Text == "")
            {
                MessageBox.Show("请选择一个要修改的学生！");
                return;
            }

            string sql = "delete student where studentID='"+this.lblID.Text+"' ";
            if (MessageBox.Show("你真的想要删除此记录吗?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.No)
            {
                return;
            }
            if (DB.executeSql(sql))
            {
                MessageBox.Show("操作成功!");
                this.setDefault();
                sql = "select * from vwStudent where className='" + this.comboBox2.SelectedItem.ToString()
                        + "' and departName='" + this.comboBox1.SelectedItem.ToString() + "'";
                DataTable dt = DB.getTable(sql);
                this.dataGrid1.DataSource = dt;
                this.BindGrid();
            }
            else
            {
                MessageBox.Show("操作失败!");
            }
        }
  

        private void Query()
        {
            if (this.comboBox1.SelectedIndex == -1 && this.comboBox2.SelectedIndex==-1 && this.textBox1.Text.Trim()=="" &&this.textBox2.Text.Trim()=="")
            {
                MessageBox.Show("至少选择一个查询条件!");
                this.comboBox2.Focus();
                return;
            }
            string depart="";
            string classes="";
            if (this.comboBox1.SelectedIndex != -1)
            {
                depart = this.comboBox1.SelectedItem.ToString();
            }
            if (this.comboBox2.SelectedIndex != -1)
            {
                classes = this.comboBox2.SelectedItem.ToString();
            }           
            string stuName = this.textBox1.Text.Trim();
            string stuID = this.textBox2.Text.Trim();
            bool where = false;
            string sql = "select * from vwStudent ";
            if (depart.Trim() != "")
            {
                sql += "where departName='"+depart+"'";
                where = true;
            }
            if (classes.Trim() != "")
            {
                if (where)
                {
                    sql += " and className='" + classes + "' ";
                }
                else
                {
                    sql += " where className='" + classes + "' ";
                    where = true;
                }
            }
            if (stuName.Trim() != "")
            {
                if (where)
                {
                    sql += " and name='" + stuName + "' ";
                }
                else
                {
                    sql += " where name='" + stuName + "' ";
                    where = true;
                }
            }
            if (stuID.Trim() != "")
            {
                if (where)
                {
                    sql += " and xuehao='" + stuID + "' ";
                }
                else
                {
                    sql += " where xuehao='" + stuID + "' ";
                    where = true;
                }
            }

            DataTable dt = DB.getTable(sql);
            if (dt.Rows.Count == 0)
            {
                this.dataGrid1.DataSource = null;
                MessageBox.Show("对不起,找不到此信息!");
                this.lblID.Text = "";
                return;
            }
            this.dataGrid1.DataSource = dt;

        }

        private void setDefault()
        {
            this.lblID.Text = "";
            this.textBox2.Text = "";
            this.textBox1.Text = "";
        }

        private void dataGrid1_Navigate(object sender, NavigateEventArgs ne)
        {
         
        }

        private void dataGrid1_CurrentCellChanged(object sender, EventArgs e)
        {
            BindGrid();
        }
        private void BindGrid()
        {
            if (this.radioButton3.Checked != true && this.radioButton2.Checked != true)
            {
                return;
            }
            if (this.dataGrid1.CurrentRowIndex == -1)
            {
                return;
            }
            this.comboBox1.SelectedItem = this.dataGrid1[this.dataGrid1.CurrentCell.RowNumber, 6].ToString();
            this.comboBox2.SelectedItem = this.dataGrid1[this.dataGrid1.CurrentCell.RowNumber, 5].ToString();
            this.textBox1.Text = this.dataGrid1[this.dataGrid1.CurrentCell.RowNumber, 2].ToString();
            this.textBox2.Text = this.dataGrid1[this.dataGrid1.CurrentCell.RowNumber, 1].ToString();
            if (this.dataGrid1[this.dataGrid1.CurrentCell.RowNumber, 3].ToString().Trim() == "男")
            {
                this.radioButton5.Checked = true;
            }
            else
            {
                this.radioButton6.Checked = true;
            }
           
            this.lblID.Text = this.dataGrid1[this.dataGrid1.CurrentCell.RowNumber, 0].ToString();

        }

   
    }
}