private void SetDataConnection(object newDataSource, BindingMemberInfo newDisplayMember, bool force)
{
bool dataSourceChanged = dataSource != newDataSource;
bool displayMemberChanged = !displayMember.Equals(newDisplayMember);
// make sure something interesting is happening...
//
//force = force && (dataSource != null || newDataSource != null);
if (force || dataSourceChanged || displayMemberChanged)
{
// If the source is a component, then hook the Disposed event,
// so we know when the component is deleted from the form
if (this.dataSource is IComponent)
{
((IComponent)dataSource).Disposed -= new EventHandler(DataSourceDisposed);
}
dataSource = newDataSource;
displayMember = newDisplayMember;
if (this.dataSource is IComponent)
{
((IComponent)dataSource).Disposed += new EventHandler(DataSourceDisposed);
}
CurrencyManager newDataManager = null;
if (newDataSource != null && BindingContext != null && !(newDataSource == Convert.DBNull))
{
newDataManager = (CurrencyManager)BindingContext[newDataSource, newDisplayMember.BindingPath];
}
if (dataManager != newDataManager)
{
if (dataManager != null)
{
dataManager.ItemChanged -= new ItemChangedEventHandler(DataManager_ItemChanged);
dataManager.PositionChanged -= new EventHandler(DataManager_PositionChanged);
}
dataManager = newDataManager;
if (dataManager != null)
{
dataManager.ItemChanged += new ItemChangedEventHandler(DataManager_ItemChanged);
dataManager.PositionChanged += new EventHandler(DataManager_PositionChanged);
}
}
// See if the BindingField in the newDisplayMember is valid
// The same thing if dataSource Changed
// "" is a good value for displayMember
if (dataManager != null && (displayMemberChanged || dataSourceChanged) && !"".Equals(displayMember.BindingMember))
{
if (!BindingMemberInfoInDataManager(displayMember))
{
throw new ArgumentException(SR.GetString(SR.ListControlWrongDisplayMember), "newDisplayMember");
}
}
if (dataManager != null && (dataSourceChanged || displayMemberChanged || force))
{
DataManager_ItemChanged(dataManager, new ItemChangedEventArgs(-1));
}
}
if (dataSourceChanged)
{
OnDataSourceChanged(EventArgs.Empty);
}
if (displayMemberChanged)
{
OnDisplayMemberChanged(EventArgs.Empty);
}
}
private void SetDataConnection(object newDataSource, BindingMemberInfo newDisplayMember, bool force)
{
bool dataSourceChanged = dataSource != newDataSource;
bool displayMemberChanged = !displayMember.Equals(newDisplayMember);
// make sure something interesting is happening...
//
//force = force && (dataSource != null || newDataSource != null);
if (inSetDataConnection)
{
return;
}
try {
if (force || dataSourceChanged || displayMemberChanged)
{
inSetDataConnection = true;
IList currentList = this.DataManager != null ? this.DataManager.List : null;
bool currentManagerIsNull = this.DataManager == null;
UnwireDataSource();
dataSource = newDataSource;
displayMember = newDisplayMember;
WireDataSource();
// Provided the data source has been fully initialized, start listening to change events on its
// currency manager and refresh our list. If the data source has not yet been initialized, we will
// skip this step for now, and try again later (once the data source has fired its Initialized event).
//
if (isDataSourceInitialized)
{
CurrencyManager newDataManager = null;
if (newDataSource != null && BindingContext != null && !(newDataSource == Convert.DBNull))
{
newDataManager = (CurrencyManager)BindingContext[newDataSource, newDisplayMember.BindingPath];
}
if (dataManager != newDataManager)
{
if (dataManager != null)
{
dataManager.ItemChanged -= new ItemChangedEventHandler(DataManager_ItemChanged);
dataManager.PositionChanged -= new EventHandler(DataManager_PositionChanged);
}
dataManager = newDataManager;
if (dataManager != null)
{
dataManager.ItemChanged += new ItemChangedEventHandler(DataManager_ItemChanged);
dataManager.PositionChanged += new EventHandler(DataManager_PositionChanged);
}
}
// See if the BindingField in the newDisplayMember is valid
// The same thing if dataSource Changed
// "" is a good value for displayMember
if (dataManager != null && (displayMemberChanged || dataSourceChanged) && displayMember.BindingMember != null && displayMember.BindingMember.Length != 0)
{
if (!BindingMemberInfoInDataManager(displayMember))
{
throw new ArgumentException(SR.ListControlWrongDisplayMember, "newDisplayMember");
}
}
if (dataManager != null && (dataSourceChanged || displayMemberChanged || force))
{
// if we force a new data manager, then change the items in the list control
// only if the list changed or if we go from a null dataManager to a full fledged one
// or if the DisplayMember changed
if (displayMemberChanged || (force && (currentList != this.dataManager.List || currentManagerIsNull)))
{
DataManager_ItemChanged(dataManager, new ItemChangedEventArgs(-1));
}
}
}
this.displayMemberConverter = null;
}
if (dataSourceChanged)
{
OnDataSourceChanged(EventArgs.Empty);
}
if (displayMemberChanged)
{
OnDisplayMemberChanged(EventArgs.Empty);
}
}
finally {
inSetDataConnection = false;
}
}
public void EqualsTest ()
{
BindingMemberInfo a = new BindingMemberInfo ("A.B.C");
BindingMemberInfo b = new BindingMemberInfo ("A.B.C");
Assert.AreEqual (a, b, "EQUALS1");
b = new BindingMemberInfo ("A.B");
Assert.IsFalse (a.Equals (b), "EQUALS2");
}
