internal void CheckBinding()
{
// At design time, don't check anything.
//
if (owner != null &&
owner.BindableComponent != null &&
owner.ControlAtDesignTime())
{
return;
}
// force Column to throw if it's currently a bad column.
//DataColumn tempColumn = this.Column;
// remove propertyChangedNotification when this binding is deleted
if (this.owner.BindingManagerBase != null &&
this.fieldInfo != null &&
this.owner.BindingManagerBase.IsBinding &&
!(this.owner.BindingManagerBase is CurrencyManager))
{
fieldInfo.RemoveValueChanged(owner.BindingManagerBase.Current, new EventHandler(PropValueChanged));
}
if (owner != null &&
owner.BindingManagerBase != null &&
owner.BindableComponent != null &&
owner.ComponentCreated &&
this.IsDataSourceInitialized)
{
string dataField = dataMember.BindingField;
fieldInfo = owner.BindingManagerBase.GetItemProperties().Find(dataField, true);
if (owner.BindingManagerBase.DataSource != null && fieldInfo == null && dataField.Length > 0)
{
throw new ArgumentException(SR.GetString(SR.ListBindingBindField, dataField), "dataMember");
}
// Do not add propertyChange notification if
// the fieldInfo is null
//
// we add an event handler to the dataSource in the BindingManagerBase because
// if the binding is of the form (Control, ControlProperty, DataSource, Property1.Property2.Property3)
// then we want to get notification from Current.Property1.Property2 and not from DataSource
// when we get the backEnd notification we push the new value into the Control's property
//
if (fieldInfo != null &&
owner.BindingManagerBase.IsBinding &&
!(this.owner.BindingManagerBase is CurrencyManager))
{
fieldInfo.AddValueChanged(this.owner.BindingManagerBase.Current, new EventHandler(PropValueChanged));
}
}
else
{
fieldInfo = null;
}
}
