public int Update(Expression <Func <object> > expression)
{
HashSet <string> props = ExpressionHelper.GetExpression_PropertyList(expression);
if (props.Count == 0)
{
throw new ObjectMappingException("not any property updated!");
}
object obj = expression.Compile()();
Type objType = obj.GetType();
foreach (var prop in props)
{
var val = objType.GetProperty(prop).GetValue(obj, null);
ColumnMapping column = TableMapping.GetColumnMappingByProperty(prop);
this.UpdateParameters.Add(new SqlParameter(column != null ? column.Name : prop, val));
}
DatabaseEngine db = DatabaseEngineFactory.GetDatabaseEngine();
return(db.Update(this));
}
public int Update()
{
DatabaseEngine db = DatabaseEngineFactory.GetDatabaseEngine();
return(db.Update(this));
}