c# 测试数据库是否连接上

 在设置连接字符串 的时候 测试是否成功~~

SqlConnection mySqlConnection   = null ;
            try
            {
                 mySqlConnection = new SqlConnection(this.txt_cMessage.Text);
                
                mySqlConnection.Open();
                System.Windows.Forms.MessageBox.Show("成功！");
                mySqlConnection.Close();
            }
            catch
            {
                System.Windows.Forms.MessageBox.Show("失败！");
            }