Whether NameObjectCollectionBase contains entries whose keys are not null. : NameObjectCollectionBase « Collections Data Structure « C# / C Sharp

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C# / C Sharp » Collections Data Structure » NameObjectCollectionBaseScreenshots 
Whether NameObjectCollectionBase contains entries whose keys are not null.
 

using System;
using System.Collections;
using System.Collections.Specialized;

public class MyCollection : NameObjectCollectionBase  {
   private DictionaryEntry _de = new DictionaryEntry();
   public DictionaryEntry thisint index ]  {
      get  {
         _de.Key = this.BaseGetKeyindex );
         _de.Value = this.BaseGetindex );
         return_de );
      }
   }
   public MyCollection()  {
   }
   public void AddString key, Object value )  {
      this.BaseAddkey, value );
   }
   public Boolean HasKeys  {
      get  {
         returnthis.BaseHasKeys() );
      }
   }

}

public class SamplesNameObjectCollectionBase  {
   public static void Main()  {
      MyCollection myCol = new MyCollection();
      Console.WriteLine"Initial state of the collection (Count = {0}):", myCol.Count );
      PrintKeysAndValuesmyCol );
      Console.WriteLine"HasKeys? {0}", myCol.HasKeys );
      myCol.Add"blue""sky" );
      Console.WriteLine"Initial state of the collection (Count = {0}):", myCol.Count );
      PrintKeysAndValuesmyCol );
      Console.WriteLine"HasKeys? {0}", myCol.HasKeys );
   }

   public static void PrintKeysAndValuesMyCollection myCol )  {
      for int i = 0; i < myCol.Count; i++ )  {
         Console.WriteLine"[{0}] : {1}, {2}", i, myCol[i].Key, myCol[i].Value );
      }
   }
}

   
  
Related examples in the same category
1.NameObjectCollectionBase Demo
2.NameObjectCollectionBase is the base class for a collection of associated String keys and Object values
3.Adds an entry with the specified key and value into NameObjectCollectionBase
4.Removes all entries from NameObjectCollectionBase
5.Gets the value of the entry at the specified index of NameObjectCollectionBase
6.Returns a String array that contains all the keys in NameObjectCollectionBase
7.Removes the entries with the specified key from NameObjectCollectionBase
8.Sets the value of the entry at the specified index of NameObjectCollectionBase
9.Whether NameObjectCollectionBase is read-only.
10.Represents a collection of associated String keys and String values
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