public override object ConvertFrom(System.ComponentModel.ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
{
if (value is string)
{
// find the column having selected name
AdditionalColumn newVal = m_list.Where(x => x.Alias.Equals(value.ToString())).FirstOrDefault();
return(newVal);
}
return(base.ConvertFrom(context, culture, value));
}
public AdditionalColumn GetObject(DBTable t)
{
AdditionalColumn result;
if (FromThisTable)
{
result = new AdditionalColumn
{
Constraint = null,
Column = t.Columns.Where(c => c.Name == Column).FirstOrDefault(),
CurrentTable = t,
CustomAlias = CustomAlias,
Output = Output,
SortColumn = null,
SortDirection = AdditionalColumn.DBSort.Asc,
Aggregation = AdditionalColumn.DBAggregation.None,
Expression = Expression,
FromThisTable = true
};
}
else if (IsFromSubTable) //from sub table
{
var fk = t.DBObjects.Where(x => x is DBFKConstraint).Cast <DBFKConstraint>().Where(c => c.Name == Constraint).FirstOrDefault();
result = new AdditionalColumn
{
Constraint = fk,
Column = (fk.Parent as DBTable).CombinedColumns.Where(c => c.Name == Column).FirstOrDefault(),
CurrentTable = t,
CustomAlias = CustomAlias,
Output = Output,
SortColumn = (fk.Parent as DBTable).Columns.Where(c => c.Name == SortColumn).FirstOrDefault(),
SortDirection = (AdditionalColumn.DBSort)Enum.Parse(typeof(AdditionalColumn.DBSort), SortDirection),
Aggregation = (AdditionalColumn.DBAggregation)Enum.Parse(typeof(AdditionalColumn.DBAggregation), Aggregation),
Expression = Expression
};
}
else //from parent
{
var fk = t.DBObjects.Where(x => x is DBFKConstraint).Cast <DBFKConstraint>().Where(c => c.Name == Constraint).FirstOrDefault();
//if((fk.ReferenceColumn.Owner as DBTable).CombinedColumns.Count == 0)
// fk.ReferenceColumn.Owner.Refresh(); //todo find better performance solution
if (fk == null)
{
return(null);
}
result = new AdditionalColumn
{
Constraint = fk,
Column = (fk.ReferenceColumn.Parent as DBTable).CombinedColumns.Where(c => c.Name == Column).FirstOrDefault(),
CurrentTable = t,
CustomAlias = CustomAlias,
Output = Output,
SortColumn = null,
SortDirection = AdditionalColumn.DBSort.Asc,
Aggregation = AdditionalColumn.DBAggregation.None,
Expression = Expression
};
}
return(result);
}
