init commit

Server Dashboard/Database/DatabaseHandler.cs

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+using Microsoft.Win32;
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data.SqlClient;
+using System.Reflection;
+
+namespace Server_Dashboard {
+    class DatabaseHandler {
+        #region Private methods
+        /// <summary>
+        /// Opens a database connection
+        /// </summary>
+        /// <param name="callback">Callback type SqlConnection</param>
+        /// <returns></returns>
+        private SqlConnection ConnectToDatabase(Action<SqlConnection> callback) {
+            using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Co2AuswertungDB"].ConnectionString)) {
+                try {
+                    con.Open();
+                    callback(con);
+                    con.Close();
+                } catch { return null; }
+            }
+            return null;
+        }
+        #endregion
+    }
+}