NameObjectCollectionBase.BaseClear Method removes all entries from the NameObjectCollectionBase instance. : NameObjectCollectionBase « Data Structure « VB.Net






  1. VB.Net
  2. Data Structure
  3. NameObjectCollectionBase

NameObjectCollectionBase.BaseClear Method removes all entries from the NameObjectCollectionBase instance.

 

Imports System
Imports System.Collections
Imports System.Collections.Specialized

Public Class MyCollection
   Inherits NameObjectCollectionBase

   Private _de As New DictionaryEntry()
   Default Public ReadOnly Property Item(index As Integer) As DictionaryEntry
      Get
         _de.Key = Me.BaseGetKey(index)
         _de.Value = Me.BaseGet(index)
         Return _de
      End Get
   End Property
   Public Sub New(d As IDictionary)
      Dim de As DictionaryEntry
      For Each de In  d
         Me.BaseAdd(CType(de.Key, [String]), de.Value)
      Next de
   End Sub 'New
   Public Sub Clear()
      Me.BaseClear()
   End Sub 

End Class 
Public Class SamplesNameObjectCollectionBase
   Public Shared Sub Main()
      Dim d = New ListDictionary()
      d.Add("A", "a")
      d.Add("B", "b")
      d.Add("P", "p")
      Dim myCol As New MyCollection(d)
      Console.WriteLine(myCol.Count)
      PrintKeysAndValues(myCol)

      myCol.Clear()
      Console.WriteLine(myCol.Count)
      PrintKeysAndValues(myCol)

   End Sub 
   Public Shared Sub PrintKeysAndValues(myCol As MyCollection)
      Dim i As Integer
      For i = 0 To myCol.Count - 1
         Console.WriteLine("[{0}] : {1}, {2}", i, myCol(i).Key, myCol(i).Value)
      Next i
   End Sub 

End Class








Related examples in the same category

1.NameObjectCollectionBase.BaseAdd adds an entry with the key and value into NameObjectCollectionBase instance.
2.NameObjectCollectionBase.BaseGet Method gets value at the specified index of the NameObjectCollectionBase instance.
3.NameObjectCollectionBase.BaseGetAllKeys Method returns a String array that contains all the keys
4.NameObjectCollectionBase.BaseHasKeys Method tells whether the NameObjectCollectionBase instance contains entries whose keys are not Nothing.
5.NameObjectCollectionBase.BaseRemove Method removes entries with the specified key
6.NameObjectCollectionBase.BaseSet Method sets the value of the entry at the specified index
7.NameObjectCollectionBase.IsReadOnly Property tells whether the NameObjectCollectionBase instance is read-only.