NameObjectCollectionBase.BaseSet Method

Definition

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.

C#
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

*/

BaseSet(Int32, Object)

Source:
NameObjectCollectionBase.cs
Source:
NameObjectCollectionBase.cs
Source:
NameObjectCollectionBase.cs

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

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

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

The collection is read-only.

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

Remarks

This method is an O(1) operation.

See also

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1
UWP 10.0

BaseSet(String, Object)

Source:
NameObjectCollectionBase.cs
Source:
NameObjectCollectionBase.cs
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.

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

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

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

Applies to

.NET 9 and other versions
Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1
UWP 10.0