De Type.GetProperties methode

Bron

Microsoft Developer Network, Type.GetProperties Method (BindingFlags)

Stappenplan

1. Open het project met de naam adodotnet in Visual Studio (je kan dat eventueel ook in een ander project uitproberen).
2. We maken gebruik van de BLL klasse voor de tabel EventCategory (BLL EventCategory).
3. In de klasse Learing voeg je de volgende methoden toe:
   1. ReflectPropertiesTryOut:

              public static void ReflectPropertiesTryOut()
              {
                  // loop through properties using reflection
                  // https://msdn.microsoft.com/en-us/library/kyaxdd3x(v=vs.110).aspx
                  Type t = typeof(FricFrac.Bll.EventCategory);
                  // Get the public properties.
                  PropertyInfo[] propInfos = t.GetProperties(BindingFlags.Public | BindingFlags.Instance);
                  Console.WriteLine("The number of public properties: {0}.\n",
                                    propInfos.Length);
                  // Display the public properties.
                  DisplayPropertyInfo(propInfos);
      
                  // Get the nonpublic properties.
                  PropertyInfo[] propInfos1 = t.GetProperties(BindingFlags.NonPublic | BindingFlags.Instance);
                  Console.WriteLine("The number of non-public properties: {0}.\n",
                                    propInfos1.Length);
      
                  // Display all the nonpublic properties.
                  DisplayPropertyInfo(propInfos1);
              }
      

   2. DisplayPropertyInfo:

             public static void DisplayPropertyInfo(PropertyInfo[] propInfos)
              {
                  // Display information for all properties.
                  foreach (var propInfo in propInfos)
                  {
                      bool readable = propInfo.CanRead;
                      bool writable = propInfo.CanWrite;
      
                      Console.WriteLine("   Property name: {0}", propInfo.Name);
                      Console.WriteLine("   Property type: {0}", propInfo.PropertyType);
                      Console.WriteLine("   Read-Write:    {0}", readable & writable);
                      if (readable)
                      {
                          MethodInfo getAccessor = propInfo.GetMethod;
                          Console.WriteLine("   Visibility:    {0}",
                                            GetVisibility(getAccessor));
                      }
                      if (writable)
                      {
                          MethodInfo setAccessor = propInfo.SetMethod;
                          Console.WriteLine("   Visibility:    {0}",
                                            GetVisibility(setAccessor));
                      }
                      Console.WriteLine();
                  }
              }
      

   3. GetVisibility:

            public static String GetVisibility(MethodInfo accessor)
              {
                  if (accessor.IsPublic)
                      return "Public";
                  else if (accessor.IsPrivate)
                      return "Private";
                  else if (accessor.IsFamily)
                      return "Protected";
                  else if (accessor.IsAssembly)
                      return "Internal/Friend";
                  else
                      return "Protected Internal/Friend";
              }

4. Roep de ReflectPropertiesTryOut methode op in de Main functie van Program.cs (zet de methode TestMySqlConnector in commentaar):

   using System;
   namespace AdoDotNet
   {
       class Program
       {
           public static void Main(string[] args)
           {
               Console.WriteLine("Leren werken met ADO.NET in .NET Core!");
               // Learning.TestMySqlConnector();
               Learning.ReflectPropertiesTryOut();
               Console.ReadKey();
           }
       }
   }

5. Met dit als resultaat: