NameObjectCollectionBase.BaseSet Method (Int32, Object)
.NET Framework (current version)
Sets the value of the entry at the specified index of the NameObjectCollectionBase instance.
Assembly: System (in System.dll)
Parameters
- index
-
Type:
System.Int32
The zero-based index of the entry to set.
- value
-
Type:
System.Object
The Object that represents the new value of the entry to set. The value can be null.
| Exception | Condition |
|---|---|
| NotSupportedException | The collection is read-only. |
| ArgumentOutOfRangeException | index is outside the valid range of indexes for the collection. |
This method is an O(1) operation.
The following code example uses BaseSet to set the value of a specific element.
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 */
Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Available since 10
.NET Framework
Available since 1.1
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