Question

I want check my SQL server connection before to connect with DB, and I need to update the status of SQL Server connection in my GUI.

Here is the code I am checking SQL connection, but I couldn’t able to get status frequently

Scenario :

• Stop the sql server service from services window
• Running the project and will show status “Connection Not Available”
• Start Sql server service and displaying “Connection Live”
• And Again Stop SQL server service and i am not getting the status as “”Connection Not
  Available”. It’s returning status as “Connection Live”
• It’s not getting to the catch block

Code:

  private void timer1_Tick(object sender, EventArgs e)
    {
        bool Flag = false;
        try
        {
            using (SqlConnection con = new SqlConnection(strcon))
            {
                con.Open();
            }
        }
        catch (SqlException s)
        {
            Flag = true;
            label1.Text = "Connection Not available";
        }
        finally
        {
            if (Flag == false)
            {
                label1.Text = "Connection Live";
            }
        }
    }

Answer 1

If there server is unavailable, your application will hang while it tries to connect. This should be run in a background worker and the status updated with a callback.