NameObjectCollectionBase.BaseSet Method

Definition

Namespace:

System.Collections.Specialized

Assembly:

System.Collections.Specialized.dll

Sets the value of an entry in the NameObjectCollectionBase instance.

Overloads

BaseSet(Int32, Object)	Sets the value of the entry at the specified index of the NameObjectCollectionBase instance.
BaseSet(String, Object)	Sets the value of the first entry with the specified key in the NameObjectCollectionBase instance, if found; otherwise, adds an entry with the specified key and value into the NameObjectCollectionBase instance.

Examples

The following code example uses BaseSet to set the value of a specific element.

#using <System.dll>
using namespace System;
using namespace System::Collections;
using namespace System::Collections::Specialized;

public ref class MyCollection : public NameObjectCollectionBase  {

   // Gets or sets the value at the specified index.
public:
   property Object^ default[ int ]  {
      Object^ get(int index)  {
         return( this->BaseGet( index ) );
      }
      void set( int index, Object^ value )  {
         this->BaseSet( index, value );
      }
   }

   // Gets or sets the value associated with the specified key.
   property Object^ default[ String^ ]  {
      Object^ get(String^ key)  {
         return( this->BaseGet( key ) );
      }
      void set( String^ key, Object^ value )  {
         this->BaseSet( key, value );
      }
   }

   // Gets a String array that contains all the keys in the collection.
   property array<String^>^ AllKeys  {
      array<String^>^ get()  {
         return( this->BaseGetAllKeys() );
      }
   }

   // Adds elements from an IDictionary into the new collection.
   MyCollection( IDictionary^ d )  {
      for each ( DictionaryEntry^ de in d )  {
         this->BaseAdd( (String^) de->Key, de->Value );
      }
   }

};

public ref class SamplesNameObjectCollectionBase  {

public:
   static void Main()  {

      // Creates and initializes a new MyCollection instance.
      IDictionary^ d = gcnew ListDictionary();
      d->Add( "red", "apple" );
      d->Add( "yellow", "banana" );
      d->Add( "green", "pear" );
      MyCollection^ myCol = gcnew MyCollection( d );
      Console::WriteLine( "Initial state of the collection:" );
      PrintKeysAndValues2( myCol );
      Console::WriteLine();

      // Sets the value at index 1.
      myCol[1] = "sunflower";
      Console::WriteLine( "After setting the value at index 1:" );
      PrintKeysAndValues2( myCol );
      Console::WriteLine();

      // Sets the value associated with the key "red".
      myCol["red"] = "tulip";
      Console::WriteLine( "After setting the value associated with the key \"red\":" );
      PrintKeysAndValues2( myCol );

   }

   static void PrintKeysAndValues2( MyCollection^ myCol )  {
      for each ( String^ s in myCol->AllKeys )  {
         Console::WriteLine( "{0}, {1}", s, myCol[s] );
      }
   }
};

int main()
{
    SamplesNameObjectCollectionBase::Main();
}

/*
This code produces the following output.

Initial state of the collection:
red, apple
yellow, banana
green, pear

After setting the value at index 1:
red, apple
yellow, sunflower
green, pear

After setting the value associated with the key "red":
red, tulip
yellow, sunflower
green, pear

*/

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

public class MyCollection : NameObjectCollectionBase  {

   // Gets or sets the value at the specified index.
   public Object this[ int index ]  {
      get  {
         return( this.BaseGet( index ) );
      }
      set  {
         this.BaseSet( index, value );
      }
   }

   // Gets or sets the value associated with the specified key.
   public Object this[ String key ]  {
      get  {
         return( this.BaseGet( key ) );
      }
      set  {
         this.BaseSet( key, value );
      }
   }

   // Gets a String array that contains all the keys in the collection.
   public String[] AllKeys  {
      get  {
         return( this.BaseGetAllKeys() );
      }
   }

   // Adds elements from an IDictionary into the new collection.
   public MyCollection( IDictionary d )  {
      foreach ( DictionaryEntry de in d )  {
         this.BaseAdd( (String) de.Key, de.Value );
      }
   }
}

public class SamplesNameObjectCollectionBase  {

   public static void Main()  {

      // Creates and initializes a new MyCollection instance.
      IDictionary d = new ListDictionary();
      d.Add( "red", "apple" );
      d.Add( "yellow", "banana" );
      d.Add( "green", "pear" );
      MyCollection myCol = new MyCollection( d );
      Console.WriteLine( "Initial state of the collection:" );
      PrintKeysAndValues2( myCol );
      Console.WriteLine();

      // Sets the value at index 1.
      myCol[1] = "sunflower";
      Console.WriteLine( "After setting the value at index 1:" );
      PrintKeysAndValues2( myCol );
      Console.WriteLine();

      // Sets the value associated with the key "red".
      myCol["red"] = "tulip";
      Console.WriteLine( "After setting the value associated with the key \"red\":" );
      PrintKeysAndValues2( myCol );
   }

   public static void PrintKeysAndValues2( MyCollection myCol )  {
      foreach ( String s in myCol.AllKeys )  {
         Console.WriteLine( "{0}, {1}", s, myCol[s] );
      }
   }
}


/*
This code produces the following output.

Initial state of the collection:
red, apple
yellow, banana
green, pear

After setting the value at index 1:
red, apple
yellow, sunflower
green, pear

After setting the value associated with the key "red":
red, tulip
yellow, sunflower
green, pear

*/

Imports System.Collections
Imports System.Collections.Specialized

Public Class MyCollection
   Inherits NameObjectCollectionBase

   ' Gets or sets the value at the specified index.
   Default Public Property Item(index As Integer) As [Object]
      Get
         Return Me.BaseGet(index)
      End Get
      Set
         Me.BaseSet(index, value)
      End Set
   End Property

   ' Gets or sets the value associated with the specified key.
   Default Public Property Item(key As [String]) As [Object]
      Get
         Return Me.BaseGet(key)
      End Get
      Set
         Me.BaseSet(key, value)
      End Set
   End Property

   ' Gets a String array that contains all the keys in the collection.
   Public ReadOnly Property AllKeys() As [String]()
      Get
         Return Me.BaseGetAllKeys()
      End Get
   End Property

   ' Adds elements from an IDictionary into the new collection.
   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

End Class


Public Class SamplesNameObjectCollectionBase   

   Public Shared Sub Main()

      ' Creates and initializes a new MyCollection instance.
      Dim d = New ListDictionary()
      d.Add("red", "apple")
      d.Add("yellow", "banana")
      d.Add("green", "pear")
      Dim myCol As New MyCollection(d)
      Console.WriteLine("Initial state of the collection:")
      PrintKeysAndValues2(myCol)
      Console.WriteLine()

      ' Sets the value at index 1.
      myCol(1) = "sunflower"
      Console.WriteLine("After setting the value at index 1:")
      PrintKeysAndValues2(myCol)
      Console.WriteLine()

      ' Sets the value associated with the key "red".
      myCol("red") = "tulip"
      Console.WriteLine("After setting the value associated with the key ""red"":")
      PrintKeysAndValues2(myCol)

   End Sub

   Public Shared Sub PrintKeysAndValues2(myCol As MyCollection)
      Dim s As [String]
      For Each s In  myCol.AllKeys
         Console.WriteLine("{0}, {1}", s, myCol(s))
      Next s
   End Sub

End Class


'This code produces the following output.
'
'Initial state of the collection:
'red, apple
'yellow, banana
'green, pear
'
'After setting the value at index 1:
'red, apple
'yellow, sunflower
'green, pear
'
'After setting the value associated with the key "red":
'red, tulip
'yellow, sunflower
'green, pear

BaseSet(Int32, Object)

Source:

NameObjectCollectionBase.cs

Sets the value of the entry at the specified index of the NameObjectCollectionBase instance.

protected:
 void BaseSet(int index, System::Object ^ value);

protected void BaseSet (int index, object? value);

member this.BaseSet : int * obj -> unit

Protected Sub BaseSet (index As Integer, value As Object)

Parameters

index

Int32

The zero-based index of the entry to set.

value

Object

The Object that represents the new value of the entry to set. The value can be null.

Exceptions

NotSupportedException

The collection is read-only.

ArgumentOutOfRangeException

index is outside the valid range of indexes for the collection.

Remarks

This method is an O(1) operation.

See also

• Performing Culture-Insensitive String Operations

BaseSet(String, Object)

Source:

NameObjectCollectionBase.cs

Sets the value of the first entry with the specified key in the NameObjectCollectionBase instance, if found; otherwise, adds an entry with the specified key and value into the NameObjectCollectionBase instance.

protected:
 void BaseSet(System::String ^ name, System::Object ^ value);

protected void BaseSet (string? name, object? value);

member this.BaseSet : string * obj -> unit

Protected Sub BaseSet (name As String, value As Object)

Parameters

name

String

The String key of the entry to set. The key can be null.

value

Object

The Object that represents the new value of the entry to set. The value can be null.

Exceptions

NotSupportedException

The collection is read-only.

Remarks

If the collection contains multiple entries with the specified key, this method sets only the first entry. To set the values of subsequent entries with the same key, use the enumerator to iterate through the collection and compare the keys.

This method is an O(1) operation.

See also

• GetEnumerator()
• Performing Culture-Insensitive String Operations