.NET (Core and Framework)

<br />
        //Connection check<br />
        public static bool ProvjeriKonekciju()<br />
        {<br />
            bool povrat = false;<br />
            SqlConnection conn = null;<br />
            Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);<br />
            ConnectionStringsSection section = config.ConnectionStrings;<br />
            ConnectionStringSettings settings;<br />
<br />
            for (int i = 0; i < section.ConnectionStrings.Count; i++)<br />
            {<br />
                settings = section.ConnectionStrings[i];<br />
                if (settings == null) continue;<br />
<br />
                conn = new SqlConnection(settings.ConnectionString);<br />
                try<br />
                {<br />
                    conn.Open();<br />
                    if (conn.State == ConnectionState.Open)<br />
                    {<br />
                        povrat = true;<br />
                        //global variable<br />
                        _ConnString = settings.ConnectionString;<br />
                        povrat = true;<br />
                        break;<br />
                    }<br />
                }<br />
                catch (SqlException sqlex)<br />
                {<br />
                    Debug.WriteLine(sqlex.ToString());<br />
                }<br />
                catch (Exception ex)<br />
                {<br />
                    Debug.WriteLine(ex.ToString());<br />
                }finally<br />
                {<br />
                    conn.Dispose();<br />
                }<br />
            }<br />
            return povrat;<br />
        }