protected override int ExecuteUpdate(IDictionary keys, IDictionary values, IDictionary oldValues)
{
GenericUpdateArgs args = new GenericUpdateArgs(keys, values, oldValues);
int rowsReturned = this.Owner.Update(args);
return(rowsReturned);
}
public virtual void OnExecuteUpdate(GenericUpdateArgs a)
{
if (ExecuteUpdate != null)
{
ExecuteUpdate(this, a);
}
else
{
throw new NotImplementedException(string.Format("ExecuteUpdate Handler for the GenericDataSource '{0}' is not implemented.", this.ID));
}
}
/// <summary>
/// Triggers the data source Update operation.
/// It ofers support for Optimistic concurrency, by storing the original and updated parameter values.
/// </summary>
/// <param name="args">The GenericUpdateArgs arguments.</param>
/// <returns>The number of affected rows.</returns>
public virtual int Update(GenericUpdateArgs args)
{
if (this.ExecuteUpdate != null)
{
ExecuteUpdate(this, args);
}
else
{
OnExecuteUpdate(args);
}
return(args.RowsAffected);
}
protected void OnUpdate(object sender, GenericUpdateArgs arg)
{
if (EnableUpdate && Data == null)
{
var set = Context.Set <TElement>();
var keynames = arg.Keys.Keys.OfType <string>().ToList();
TElement x;
if (arg.Keys.Count == 1)
{
x = set.Find(arg.Keys[0]);
}
else
{
var keyindexes = keynames.Select(key => typeof(TElement).GetProperties().Select(p => p.Name).ToList().IndexOf(key)).ToList();
x = set.Find(keynames.OrderBy(name => keyindexes));
}
arg.FillDataItem <TElement>(x);
Context.SaveChanges();
changed = false;
RaiseDataSourceChangedEvent(EventArgs.Empty);
}
}
