CurrencyManager

CurrencyManager

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System. Windows .Forms (system. windows .forms.dll)

class

This class represents a bag of Binding objects for a list-like data source. List-like objects (such as arrays, collections, and System.Data.DataTable objects) implement IList , System.ComponentModel.IListSource , or System.ComponentModel.IBindingList . Compare this with PropertyManager that deals with simple properties.

It maintains the concept of the Current item in the list. When the current item is changed (by setting the Position property, or because the System.ComponentModel.IBindingList.ListChanged event was raised), all the objects bound to the data source through the Binding objects are updated with the new value. (See Binding for details on how this update can be controlled through the Parse and Format events).

Note that the standard controls such as ListBox and DataGrid will update the Position automatically as the UI selection changes.

See Binding for more information on the data-binding hierarchy.

 public class  CurrencyManager  : BindingManagerBase {  // Protected Instance Fields  protected Type  finalType  ;    protected int  listposition  ;  // Public Instance Properties  public override int  Count  {get; }  // overrides BindingManagerBase  public override object  Current  {get; }  // overrides BindingManagerBase  public IList  List  {get; }    public override int  Position  {set; get; }  // overrides BindingManagerBase   // Public Instance Methods  public override void  AddNew  ();  // overrides BindingManagerBase  public override void  CancelCurrentEdit  ();  // overrides BindingManagerBase  public override void  EndCurrentEdit  ();  // overrides BindingManagerBase  public override PropertyDescriptorCollection  GetItemProperties  ();  // overrides BindingManagerBase  public void  Refresh  ();    public override void  RemoveAt  (int  index  );  // overrides BindingManagerBase  public override void  ResumeBinding  ();  // overrides BindingManagerBase  public override void  SuspendBinding  ();  // overrides BindingManagerBase   // Protected Instance Methods  protected void  CheckEmpty  ();    protected internal override string  GetListName  (         System.Collections.ArrayList  listAccessors  );  // overrides BindingManagerBase  protected internal override void  OnCurrentChanged  (EventArgs  e  );  // overrides BindingManagerBase  protected virtual void  OnItemChanged  (ItemChangedEventArgs  e  );    protected virtual void  OnPositionChanged  (EventArgs  e  );    protected override void  UpdateIsBinding  ();  // overrides BindingManagerBase   // Events  public event ItemChangedEventHandler  ItemChanged  ; } 

Hierarchy

System.Object BindingManagerBase CurrencyManager

Returned By

ListControl.DataManager

Passed To

DataGridColumnStyle.CheckValidDataSource() , DataGridTableStyle.DataGridTableStyle()