/// <summary>
/// Performs an update operation on the list of data
/// that the EntityDataSourceView object represents.
/// </summary>
/// <param name="keys">An System.Collections.IDictionary of object or
/// row keys to be updated by the update operation.</param>
/// <param name="values">An System.Collections.IDictionary of name/value
/// pairs that represent data elements and their original values.</param>
/// <param name="oldValues">An System.Collections.IDictionary of name/value
/// pairs that represent data elements and their new values.</param>
/// <returns>The number of items that were updated in the underlying data storage.</returns>
protected override int ExecuteUpdate(IDictionary keys, IDictionary values, IDictionary oldValues)
{
IEnumerable entityList = GetEntityList();
ValidateEntity(entityList);
// set the EntityIndex based on keys
SetEntityIndex(entityList, keys);
EntityDataSourceMethodEventArgs eventArgs = new EntityDataSourceMethodEventArgs(entityList, EntityIndex, values);
OnUpdating(eventArgs);
if ( eventArgs.Cancel )
{
return 0;
}
// get the current item in the collection
Object entity = GetCurrentEntity();
// raise linked event
OnAfterUpdating(new LinkedDataSourceEventArgs(entity, values, EntityIndex));
// set date/time values
String[] names = GetUpdateDateTimeNames();
EntityUtil.InitEntityDateTimeValues(entity, names);
EntityUtil.SetEntityValues(entity, values);
// perform update
Object[] args = GetArgs(entity);
int count = 0;
try
{
Object result = EntityUtil.InvokeMethod(Provider, UpdateMethod, args);
if ( result == null || Convert.ToBoolean(result) )
{
count = 1;
UpdateEntityId(entityList);
OnUpdated(new EntityDataSourceMethodEventArgs(entityList, EntityIndex, values, count));
OnAfterUpdated(new LinkedDataSourceEventArgs(entity, values, EntityIndex));
RaiseChangedEvent();
}
}
catch ( Exception ex )
{
EntityDataSourceMethodEventArgs e = new EntityDataSourceMethodEventArgs(entityList, EntityIndex, values, count, ex);
OnUpdated(e);
if ( !e.ExceptionHandled )
{
throw;
}
}
return count;
}
/// <summary>
/// Gets a list of data from the underlying data storage.
/// </summary>
/// <param name="arguments">A System.Web.UI.DataSourceSelectArguments that
/// is used to request operations on the data beyond basic data retrieval.</param>
/// <returns>An System.Collections.IEnumerable list of data from the underlying data storage.</returns>
protected override IEnumerable ExecuteSelect(DataSourceSelectArguments arguments)
{
arguments.RaiseUnsupportedCapabilitiesError(this);
IEnumerable entityList = null;
Hashtable param = new Hashtable();
Object entityId = GetEntityId();
if ( entityId != null )
{
String key = EntityKeyName ?? EntityDataSource.EntityIdParameterName;
param.Add(key, entityId);
}
EntityDataSourceSelectingEventArgs eventArgs = new EntityDataSourceSelectingEventArgs(param, arguments);
OnSelecting(eventArgs);
if ( eventArgs.Cancel )
{
return null;
}
try
{
entityList = GetEntityList(arguments);
if ( entityList != null )
{
IList list = EntityUtil.GetEntityList(entityList);
// make sure we have a valid TotalRowCount
if ( arguments.TotalRowCount < 1 )
{
arguments.TotalRowCount = list.Count;
}
UpdateEntityId(entityList);
OnSelected(new EntityDataSourceMethodEventArgs(entityList, EntityIndex, param, arguments.TotalRowCount));
if ( arguments.TotalRowCount > 0 && list.Count > 0 )
{
// raise linked event
OnAfterSelected(new LinkedDataSourceEventArgs(list[EntityIndex], _owner.GetParameterValueMap(), EntityIndex));
}
}
}
catch ( Exception ex )
{
EntityDataSourceMethodEventArgs e = new EntityDataSourceMethodEventArgs(entityList, EntityIndex, param, 0, ex);
OnSelected(e);
if ( !e.ExceptionHandled )
{
throw;
}
}
return entityList;
}
/// <summary>
/// Performs an insert operation on the list of data
/// that the EntityDataSourceView object represents.
/// </summary>
/// <param name="values">A System.Collections.IDictionary of
/// name/value pairs used during an insert operation.</param>
/// <returns>The number of items that were inserted into the underlying data storage.</returns>
protected override int ExecuteInsert(IDictionary values)
{
Object entity = GetNewEntity();
IEnumerable entityList = new Object[] { entity };
Guid entityId = Guid.Empty;
ValidateEntity(entityList);
EntityDataSourceMethodEventArgs eventArgs = new EntityDataSourceMethodEventArgs(entityList, 0, values);
OnInserting(eventArgs);
if ( eventArgs.Cancel )
{
return 0;
}
// raise linked event
OnAfterInserting(new LinkedDataSourceEventArgs(entity, values, 0));
// set date/time values
String[] names = GetInsertDateTimeNames();
EntityUtil.InitEntityDateTimeValues(entity, names);
EntityUtil.SetEntityValues(entity, values);
// set primary key value
if ( !String.IsNullOrEmpty(EntityKeyName) )
{
entityId = EntityUtil.SetEntityKeyValue(entity, EntityKeyName);
}
// perform insert
Object[] args = GetArgs(entity);
int count = 0;
try
{
Object result = EntityUtil.InvokeMethod(Provider, InsertMethod, args);
if ( result == null || Convert.ToBoolean(result) )
{
count = 1;
UpdateEntityId(entityList);
OnInserted(new EntityDataSourceMethodEventArgs(entityList, 0, values, count));
OnAfterInserted(new LinkedDataSourceEventArgs(entity, values, 0));
RaiseChangedEvent();
}
}
catch ( Exception ex )
{
EntityDataSourceMethodEventArgs e = new EntityDataSourceMethodEventArgs(entityList, 0, values, count, ex);
OnInserted(e);
if ( !e.ExceptionHandled )
{
throw;
}
}
return count;
}
/// <summary>
/// Performs a delete operation on the list of data
/// that the EntityDataSourceView object represents.
/// </summary>
/// <param name="keys">A System.Collections.IDictionary of object or
/// row keys to be deleted by the ExecuteDelete operation.</param>
/// <param name="oldValues">An System.Collections.IDictionary of name/value
/// pairs that represent data elements and their original values.</param>
/// <returns>The number of items that were deleted from the underlying data storage.</returns>
protected override int ExecuteDelete(IDictionary keys, IDictionary oldValues)
{
IEnumerable entityList = GetEntityList();
ValidateEntity(entityList);
// set the EntityIndex based on keys
SetEntityIndex(entityList, keys);
EntityDataSourceMethodEventArgs eventArgs = new EntityDataSourceMethodEventArgs(entityList, EntityIndex, oldValues);
OnDeleting(eventArgs);
if ( eventArgs.Cancel )
{
return 0;
}
// get the current item in the collection
Object entity = GetCurrentEntity();
// perform delete
Object[] args = GetArgs(entity);
int count = 0;
try
{
Object result = EntityUtil.InvokeMethod(Provider, DeleteMethod, args);
if ( result == null || Convert.ToBoolean(result) )
{
count = 1;
OnDeleted(new EntityDataSourceMethodEventArgs(entityList, EntityIndex, oldValues, count));
RaiseChangedEvent();
}
}
catch ( Exception ex )
{
EntityDataSourceMethodEventArgs e = new EntityDataSourceMethodEventArgs(entityList, EntityIndex, oldValues, count, ex);
OnDeleted(e);
if ( !e.ExceptionHandled )
{
throw;
}
}
return count;
}
/// <summary>
/// Raises the EntityDataSource.Updating event.
/// </summary>
/// <param name="args">An instance of EntityDataSourceMethodEventArgs containing the event data.</param>
internal void OnUpdating(EntityDataSourceMethodEventArgs args)
{
if ( _owner.Updating != null )
{
_owner.Updating(_owner, args);
}
}
/// <summary>
/// Raises the EntityDataSource.Selected event.
/// </summary>
/// <param name="args">An instance of EntityDataSourceMethodEventArgs containing the event data.</param>
internal void OnSelected(EntityDataSourceMethodEventArgs args)
{
if ( _owner.Selected != null )
{
_owner.Selected(_owner, args);
}
}
