.net窗体button按钮没有反应

namespace BANK
{
    public partial class Formc : Form
    {
        public Formc()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "" || textBox3.Text == ""|| textBox2.Text == "")
                 MessageBox.Show("提示：请输入完整信息！", "警告");
            char Card_id = char.Parse(this.textBox2.Text);
            double money = double.Parse(this.textBox1.Text);
            string up = "update DemDeposit set Saving_money='" + money + "' where Card_ID='" + Card_id + "'";
            SqlConnection conn = new SqlConnection("Data Source=(local);Initial Catalog=bank;Integrated Security=True");
            conn.Open();
            SqlCommand cmd = new SqlCommand("select * from Client_info where Card_ID='" + textBox1.Text.Trim() + "' and Card_p='" + textBox3.Text.Trim() + "'", conn);
            SqlDataReader sdr = cmd.ExecuteReader();
            sdr.Read();
            if (sdr.HasRows)
            {
                SqlCommand mycom = new SqlCommand(up, conn);
                mycom.ExecuteNonQuery();                           //执行更新语句 
                conn.Close();
            }

            else
                MessageBox.Show("提示：学生卡名或密码错误!", "警告");
            conn.Close();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            Environment.Exit(0);
        }
    }
}
什么都不输入，点确定应该输出MessageBox.Show("提示：请输入完整信息！", "警告");但没反应，取消也没反应
看下事件注册成功没有。右键“button1_Click”查看引用。看看有没有下面这样的一句代码：

this.button1.Click+=new new System.EventHandler(this..button1_Click)
用KEYDOWN事件是不是更好点 而且判断要用 if(e.keycode != keys.enter) return