public static object GetList(object dataSource, string dataMember)
{
dataSource = GetList(dataSource);
if (dataSource == null || dataMember == null || dataMember.Length == 0)
{
return(dataSource);
}
PropertyDescriptor property = GetListItemProperties(dataSource).Find(dataMember, true);
if (property == null)
{
throw new ArgumentException("dataMember");
}
object item = null;
#if NET_2_0
ICurrencyManagerProvider currencyManagerProvider = dataSource as ICurrencyManagerProvider;
if (currencyManagerProvider != null && currencyManagerProvider.CurrencyManager != null)
{
CurrencyManager currencyManager = currencyManagerProvider.CurrencyManager;
if (currencyManager != null && currencyManager.Count > 0 && currencyManager.Current != null)
{
item = currencyManager.Current;
}
}
#endif
if (item == null)
{
if (dataSource is IEnumerable)
{
if (dataSource is IList)
{
IList list = (IList)dataSource;
item = list.Count > 0 ? list[0] : null;
}
else
{
IEnumerator e = ((IEnumerable)dataSource).GetEnumerator();
if (e != null && e.MoveNext())
{
item = e.Current;
}
}
}
else
{
item = dataSource;
}
}
if (item != null)
{
return(property.GetValue(item));
}
return(null);
}
private void DisconnectDataSourceEvents(object dataSource)
{
if (dataSource == null)
{
return;
}
ICurrencyManagerProvider currencyManagerProvider = dataSource as ICurrencyManagerProvider;
if (currencyManagerProvider != null && currencyManagerProvider.CurrencyManager != null)
{
currencyManagerProvider.CurrencyManager.CurrentItemChanged -= OnParentCurrencyManagerChanged;
currencyManagerProvider.CurrencyManager.MetaDataChanged -= OnParentCurrencyManagerChanged;
}
}
/// <summary>
/// RegisterControlEvents() registers all the relevant events for the container control supplied and also to all child controls
/// in the oontainer control.
/// </summary>
/// <param name="container">The control (including child controls) to have the refresh events registered.</param>
/// <param name="register">True to register the events, false to unregister them.</param>
private void RegisterControlEvents(ICurrencyManagerProvider container, bool register)
{
var currencyManager = container.CurrencyManager;
// If we are to register the events the do so.
if (register)
{
currencyManager.Bindings.CollectionChanged += Bindings_CollectionChanged;
currencyManager.Bindings.CollectionChanging += Bindings_CollectionChanging;
}
// Else unregister them.
else
{
currencyManager.Bindings.CollectionChanged -= Bindings_CollectionChanged;
currencyManager.Bindings.CollectionChanging += Bindings_CollectionChanging;
}
// Reigster the binding complete events for the currencymanagers bindings.
RegisterBindingEvents(currencyManager.Bindings, register);
}
public BindingManagerBase this [object dataSource, string dataMember] {
get {
if (dataSource == null)
{
throw new ArgumentNullException("dataSource");
}
if (dataMember == null)
{
dataMember = String.Empty;
}
#if NET_2_0
ICurrencyManagerProvider cm_provider = dataSource as ICurrencyManagerProvider;
if (cm_provider != null)
{
if (dataMember.Length == 0)
{
return(cm_provider.CurrencyManager);
}
return(cm_provider.GetRelatedCurrencyManager(dataMember));
}
#endif
HashKey key = new HashKey(dataSource, dataMember);
BindingManagerBase res = managers [key] as BindingManagerBase;
if (res != null)
{
return(res);
}
res = CreateBindingManager(dataSource, dataMember);
if (res == null)
{
return(null);
}
managers [key] = res;
return(res);
}
}
/// <summary>
/// RegisterControlEvents() registers all the relevant events for the container control supplied and also to all child controls
/// in the oontainer control.
/// </summary>
/// <param name="container">The control (including child controls) to have the refresh events registered.</param>
/// <param name="register">True to register the events, false to unregister them.</param>
private void RegisterControlEvents(ICurrencyManagerProvider container, bool register)
{
var currencyManager = container.CurrencyManager;
// If we are to register the events the do so.
if (register)
{
currencyManager.Bindings.CollectionChanged += Bindings_CollectionChanged;
currencyManager.Bindings.CollectionChanging += Bindings_CollectionChanging;
}
// Else unregister them.
else
{
currencyManager.Bindings.CollectionChanged -= Bindings_CollectionChanged;
currencyManager.Bindings.CollectionChanging += Bindings_CollectionChanging;
}
// Reigster the binding complete events for the currencymanagers bindings.
RegisterBindingEvents(currencyManager.Bindings, register);
}
