frmtel.cs

企业短信群发系统

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

namespace SMS.Forms
{
    public partial class frmTel : Form
    {
        private static frmTel tel;//生命一个私有变量，用来保存唯一的窗体变量
        public frmTel()
        {
            InitializeComponent();
        }

        //提供一个静态方法，此方法是用来判断何时实例化窗体
        public static frmTel Instance()
        {
            if (tel == null)
                tel = new frmTel();
            return tel;
        }

        private void frmTel_FormClosing(object sender, FormClosingEventArgs e)
        {
            tel.Dispose(true);
            tel = null;
        }

        private void pbDelete_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("确定要删除吗？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.OK)
            {
                string id = dgvAllUser.SelectedCells[0].Value.ToString();//获取列编号
                OleDbConnection conn = BaseClass.ConnClass.DataConn();   //连接数据库
                conn.Open();
                OleDbCommand cmd = new OleDbCommand("delete from tb_tel where ID = " + id, conn);
                cmd.ExecuteNonQuery();
                conn.Close();
                MessageBox.Show("删除联系人成功", "提示");
                SetTelData();
            }
        }

        private void pbClose_Click(object sender, EventArgs e)
        {
            tel.Dispose(true);
            tel = null;
            this.Close();
        }

        private void frmTel_Load(object sender, EventArgs e)
        {
            SetTelData();
        }
        private void SetTelData()
        {
            OleDbConnection conn = BaseClass.ConnClass.DataConn();//连接数据库
            OleDbDataAdapter da = new OleDbDataAdapter("select * from tb_tel order by ID desc", conn);
            DataSet ds = new DataSet();
            da.Fill(ds);
            dgvAllUser.DataSource = ds.Tables[0];
        }
    }
}