In normal webcombo has Text and value fields, when getting select value we use selectedvalue property for value and SelectedText for Display value,

 in infragisitics webcombo have properties to set bindings of text and value filed, as i have done,

        ulwcSUOM.DataTextField = "UOMCode";
        ulwcSUOM.DataValueField = "GUUOMID";
        ulwcSUOM.DataMember = "UOMInfo";
        ulwcSUOM.DataSource = commonXsdObj.Tables["UOMInfo"];
        ulwcSUOM.DataBind();

 But when accessing selectedvalue there is no property to get that, only displayValue property to get display text how i can get the selectedValue of selected item on webcombo in server side