System.Web.UI.WebControls (system.web.dll)sealed class

The DataKeyCollection class contains a read-only collection of primary field key names as strings. This class is used by the BaseDataList.DataKeys property to facillitate editing (for example, you can use a unique ID for your key field and use it to build SQL statements when you need to update a record in response to a user edit operation). You must specify the data key you want to use in the BaseDataList.DataKeyField property before you bind the data list.

public sealed class DataKeyCollection : ICollection, IEnumerable {
// Public Constructors
   public DataKeyCollection(System.Collections.ArrayList keys);
// Public Instance Properties
   public int Count{get; }                          // implements ICollection
   public bool IsReadOnly{get; }
   public bool IsSynchronized{get; }                // implements ICollection
   public object SyncRoot{get; }                    // implements ICollection
   public object this[int index]{get; }
// Public Instance Methods
   public void CopyTo(Array array, int index);                  // implements ICollection
   public IEnumerator GetEnumerator( );              // implements IEnumerable

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    Part I: Introduction to ASP.NET
    Part III: Namespace Reference
    Chapter 40. The System.Web.UI.MobileControls Namespace
    Chapter 42. The System.Web.UI.WebControls Namespace