Serialize /Deserialize XmlAttribute with Enum values and some default

Hi,

MY XML:

<ColProperty DBColumn="System" DisplayInGrid=" Mode" IsDisplay="true" IsSelecte="true" SelectedPosition="0" Coordinate="-1" IsClassifyFiled="false" />

The attribute Coordinate contain values (-1 till 4) when 0 till 4 is represented by Enum :

    public enum COORD_SYSTEM
    {
        [XmlEnumAttribute("0")]
        COORD_SYSTEM_GEO = 0,	// Display : GEO
        [XmlEnumAttribute("1")]
        COORD_SYSTEM_UTM = 1,	// Display : UTM
        [XmlEnumAttribute("2")]
        COORD_SYSTEM_RSO = 2,	// Display : RSO
        [XmlEnumAttribute("3")]
        COORD_SYSTEM_GEO_LEGACY = 3, // Display : GEO Legacy
        [XmlEnumAttribute("4")]
        COORD_SYSTEM_MRG = 4	// Display : MGR
    }

My XML is serialize  and  connect  to  DataGridView.

I want that when there is (-1) value in the XML attribute “Coordinate”, My cell in the DataGridView will be empty.

Is it possible?

I can't change the Enum...