private void BindTarget(bool bind)
{
if (bind)
{
if (IsBinding)
{
if (propInfo != null && control != null)
{
EventHandler handler = new EventHandler(this.Target_PropertyChanged);
propInfo.AddValueChanged(control, handler);
}
if (validateInfo != null)
{
CancelEventHandler handler = new CancelEventHandler(this.Target_Validate);
validateInfo.AddEventHandler(control, handler);
}
}
}
else
{
if (propInfo != null && control != null)
{
EventHandler handler = new EventHandler(this.Target_PropertyChanged);
propInfo.RemoveValueChanged(control, handler);
}
if (validateInfo != null)
{
CancelEventHandler handler = new CancelEventHandler(this.Target_Validate);
validateInfo.RemoveEventHandler(control, handler);
}
}
}
internal PropertyManager(Object dataSource, string propName) : this(dataSource) {
propInfo = TypeDescriptor.GetProperties(dataSource).Find(propName, true);
if (propInfo == null)
{
throw new ArgumentException(SR.GetString(SR.PropertyManagerPropDoesNotExist, propName, dataSource.ToString()));
}
propInfo.AddValueChanged(dataSource, new EventHandler(PropertyChanged));
}
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;
}
}
internal override void SetDataSource(Object dataSource)
{
if (this.dataSource != null && !String.IsNullOrEmpty(this.propName))
{
propInfo.RemoveValueChanged(this.dataSource, new EventHandler(PropertyChanged));
propInfo = null;
}
this.dataSource = dataSource;
if (this.dataSource != null && !String.IsNullOrEmpty(this.propName))
{
propInfo = TypeDescriptor.GetProperties(dataSource).Find(propName, true);
if (propInfo == null)
{
throw new ArgumentException(string.Format(SR.PropertyManagerPropDoesNotExist, propName, dataSource.ToString()));
}
propInfo.AddValueChanged(dataSource, new EventHandler(PropertyChanged));
}
}
private protected override void SetDataSource(object dataSource)
{
if (_dataSource != null && !string.IsNullOrEmpty(_propName))
{
_propInfo.RemoveValueChanged(_dataSource, new EventHandler(PropertyChanged));
_propInfo = null;
}
_dataSource = dataSource;
if (_dataSource != null && !string.IsNullOrEmpty(_propName))
{
_propInfo = TypeDescriptor.GetProperties(dataSource).Find(_propName, true);
if (_propInfo is null)
{
throw new ArgumentException(string.Format(SR.PropertyManagerPropDoesNotExist, _propName, dataSource.ToString()));
}
_propInfo.AddValueChanged(dataSource, new EventHandler(PropertyChanged));
}
}
