企业管理

开发平台：
C#

job.cs：源码内容
							﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace 人事管理系统
{
    public partial class job : Form
    {
        Datacon mydatacon = new Datacon();
        SqlConnection sqlcn = new SqlConnection();
        SqlDataAdapter myadapter = new SqlDataAdapter();
        DataSet mydataset = new DataSet();
        SqlCommandBuilder myBuilder = new SqlCommandBuilder();
        public job()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            sqlcn = mydatacon.getcon();
            string cmd = "select CODE as 职位编号, DESCRIPTION as 职位名称 from [JOB]";
            myadapter = new SqlDataAdapter(cmd, sqlcn);
            mydataset.Clear();
            myadapter.Fill(mydataset, "JOB");
            dataGridView1.DataSource = mydataset.Tables["JOB"];//用来刷新DataGridView里面的数据
            sqlcn.Close();
        }
        //private DataTable comDatatable;
        private void job_Load(object sender, EventArgs e)
        {
            sqlcn = mydatacon.getcon();//调用连接函数
            string cmd = "select CODE as 职位编号, DESCRIPTION as 职位名称 from [JOB]";
            myadapter = new SqlDataAdapter(cmd, sqlcn);
            mydataset.Clear();
            myadapter.Fill(mydataset, "JOB");
            dataGridView1.DataSource = mydataset.Tables["JOB"];
            comboBox2.DataSource = mydataset.Tables["JOB"];
            comboBox2.DisplayMember = mydataset.Tables["JOB"].Columns[1].ColumnName;
            comboBox2.ValueMember = mydataset.Tables["JOB"].Columns[1].ColumnName;
            //在窗体加载的同时填充DataGridView和ComboBox内的数据
            sqlcn.Close();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            myBuilder = new SqlCommandBuilder(myadapter);
            myadapter.Update(mydataset, "JOB");
            MessageBox.Show("保存修改信息成功!");//保存对表格内的修改
            sqlcn.Close();
        }
        private void button3_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        private void button4_Click(object sender, EventArgs e)
        {
            if (this.comboBox1.Text == "删除")
            {
                sqlcn = mydatacon.getcon();
                sqlcn.Open();
                SqlCommand cmd = new SqlCommand();
                cmd.Connection = sqlcn;
                SqlCommand cnd = new SqlCommand("查询职位是否存在 '" + this.comboBox2.Text + "'", sqlcn);
                string q = cnd.ExecuteScalar().ToString();//查询与输入相同的职位是否存在
                SqlCommand ccd = new SqlCommand("select count(*) from [PERSON] where JOB= '" + this.comboBox2.Text + "'", sqlcn);
                string t = ccd.ExecuteScalar().ToString();
                if (q == "0")
                {
                    MessageBox.Show("您输入的职位不存在，请重新选择！");
                    sqlcn.Close();
                    return;
                }
                else
                    if (t != "0")
                    {
                        MessageBox.Show("您想删除的职位当前正在被使用,请确认后再删除!");
                        sqlcn.Close();
                        return;
                    }
                    else
                {
                    cmd.CommandText = "delete from [JOB] where DESCRIPTION='" + this.comboBox2.Text + "'";
                    cmd.ExecuteNonQuery();//执行删除职位的命令
                   
                    string cad = "select CODE as 职位编号, DESCRIPTION as 职位名称 from [JOB]";
                    myadapter = new SqlDataAdapter(cad, sqlcn);
                    mydataset.Clear();
                    myadapter.Fill(mydataset, "JOB");
                    dataGridView1.DataSource = mydataset.Tables["JOB"];
                    sqlcn.Close();//再次刷新DataGridView内的数据
                   
                }
            }
            else
            {
                sqlcn = mydatacon.getcon();
                sqlcn.Open();
                SqlCommand cnd = new SqlCommand("查询职位是否存在 '" + this.comboBox2.Text + "'", sqlcn);
                string q = cnd.ExecuteScalar().ToString();//同上
                if (q == "0")
                {
                    SqlCommand cmd = new SqlCommand();
                    cmd.Connection = sqlcn;
                    cmd.CommandText = "insert into [JOB](DESCRIPTION) values('" + this.comboBox2.Text + "')";
                    cmd.ExecuteNonQuery();//执行添加职位命令
                  
                    string cad = "select CODE as 职位编号, DESCRIPTION as 职位名称 from [JOB]";
                    myadapter = new SqlDataAdapter(cad, sqlcn);
                    mydataset.Clear();
                    myadapter.Fill(mydataset, "JOB");
                    dataGridView1.DataSource = mydataset.Tables["JOB"];
                    sqlcn.Close();//再次刷新DataGridView内的数据
                  
                }
                else
                {
                    MessageBox.Show("您输入的职位已存在，请重新输入！");
                    sqlcn.Close();
                    return;
                }
            }
        }
        private void dataGridView1_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            int n = dataGridView1.CurrentRow.Index;
            dataGridView1.CurrentCell = dataGridView1[0, n];
            string str = dataGridView1.CurrentCell.Value.ToString();
            sqlcn.Open();
            SqlDataAdapter com = new SqlDataAdapter("select * from [JOB] where CODE='" + str + "'", sqlcn);
            DataSet ds = new DataSet();
            com.Fill(ds);
            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                comboBox2.Text = dr["DESCRIPTION"].ToString();
            }
            sqlcn.Close();
        }
    }
}

						