Primary display field.
[Visual Basic .NET] Public ReadOnly Property DisplayField As String
[C#] public string DisplayField {get;}
[C++]
HRESULT get_DisplayField(
BSTR* FieldName
);
[C++]Parameters
FieldName [out, retval] FieldName is a parameter of type BSTR
Product Availability
Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.
Remarks
When DisplayExpression is used by layer in the source map document, MapServer returns the first field used in the DisplayExpression.