public Field(string displayName, string sqlFieldName, FieldTypeBase fieldType,
string sourceTable, string customJoin)
{
SelectedValues = new List <SelectedValue>();
_displayName = displayName;
_sqlFieldName = sqlFieldName.ToLower();
_fieldType = fieldType;
_sourceTable = !string.IsNullOrWhiteSpace(sourceTable) ? sourceTable.ToLower() : null;
_customJoin = !string.IsNullOrWhiteSpace(customJoin) ? customJoin.ToLower() : null;
}
public Field(string displayName, string sqlFieldName, FieldTypeBase fieldType,
string sourceTable = null, string foreingKey = null, string lookupKey = null) : this(displayName, sqlFieldName, fieldType, sourceTable, null)
{
_foreingKey = !string.IsNullOrWhiteSpace(foreingKey) ? foreingKey.ToLower() : null;
_lookupKey = !string.IsNullOrWhiteSpace(lookupKey) ? lookupKey.ToLower() : null;
}