frmadddy.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 frmAddDy : Form
    {
        private static frmAddDy adddy;//声明一个私有变量，用来保存唯一的窗体实例
        public frmAddDy()
        {
            InitializeComponent();
        }

         //提供一个静态方法，这个方法是用来判断何时创建这个窗体实力的
        public static frmAddDy Instance()
        {
            if (adddy == null) //当窗体实例占用的内存被释放时
                adddy = new frmAddDy();//创建窗体的实例
            return adddy;//此方法返回的窗体实例
        }

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

        private void pbSubmit_Click(object sender, EventArgs e)
        {
            if (txtDy.Text != "")
            {
                string strtype = cbbType.SelectedItem.ToString();
                string strnote = txtDy.Text;
                OleDbConnection conn = BaseClass.ConnClass.DataConn();
                conn.Open();
                OleDbCommand cmd = new OleDbCommand("insert into tb_note([type],[note]) values('" + strtype + "','" + strnote + "')", conn);
                cmd.ExecuteNonQuery();
                txtDy.Text = "";
                MessageBox.Show("添加成功！", "提示");
                conn.Close();
            }
            else
            {
                MessageBox.Show("短信内容不能为空！", "提示");
                return;
            }
        }

        private void pictureBox2_Click(object sender, EventArgs e)
        {
            adddy.Dispose(true);
            adddy = null;
        }
    }
}