c#异步读取数据库与异步更新ui的代码实现

private void button1_Click(object sender, EventArgs e)
        {
            SqlConnection con;
            SqlCommand com;
            try
            {
                con = new SqlConnection("UID=sa;Password=123;Initial Catalog=AD;Data Source=192.168.1.1;Asynchronous Processing=true");
                con.Open();
                com = new SqlCommand("select top 100 * from tb_user", con);
                com.BeginExecuteReader(new AsyncCallback(delDataBin), com);
            }
            catch (Exception ex)
            {
                MessageBox.Show("程序发生错误,信息: " + ex.Message);
            }

        }

        private void delDataBin(IAsyncResult ar)
        {
            if (ar.IsCompleted)
            {
                SqlCommand com = (SqlCommand)ar.AsyncState;
                SqlDataReader dr = com.EndExecuteReader(ar);
                DataTable dt = new DataTable();
                dt.Load(dr);
                dr.Close();

                this.dataGridView1.DataSource = dt;  //绑定数据           

            }
        }

        public void dataBin(DataTable dt)
        {
            dataGridView1.DataSource = dt;
            return;
        } 

//绑定数据
                if (this.InvokeRequired)
                {
                    updateDG ur = new updateDG(dataBin);
                    this.Invoke(ur, dt);
                }

        private void button1_Click(object sender, EventArgs e)
        {
            SqlConnection con;
            SqlCommand com;
            try
            {
                con = new SqlConnection("UID=sa;Password=123;Initial Catalog=AD;Data Source=192.168.1.1;Asynchronous Processing=true");
                con.Open();
                com = new SqlCommand("select top 100 * from tb_user", con);
                com.BeginExecuteReader(new AsyncCallback(delDataBin), com);
            }
            catch (Exception ex)
            {
                MessageBox.Show("程序发生错误,信息: " + ex.Message);
            }

        }

        private void delDataBin(IAsyncResult ar)
        {
            if (ar.IsCompleted)
            {
                SqlCommand com = (SqlCommand)ar.AsyncState;
                SqlDataReader dr = com.EndExecuteReader(ar);
                DataTable dt = new DataTable();
                dt.Load(dr);
                dr.Close();

                //this.dataGridView1.DataSource = dt;//绑定数据

                if (this.InvokeRequired)
                {
                    updateDG ur = new updateDG(dataBin);
                    this.Invoke(ur, dt);
                }
            }
        }

        public delegate void updateDG(DataTable dt);

        public void dataBin(DataTable dt)
        {
            dataGridView1.DataSource = dt;
            return;
        }