Question

C#怎么判断数据库是否连接成功

Answer 1

private void Form1_Load(object sender, EventArgs e)
        {
            try
            {
                con.Open();
                label1.Text = "连接成功";
            }
            catch (OleDbException err) 
            {
                label1.Text = "连接不成功";
            }
            finally
            {
                con.Close();
  }