The problem is the field is not found. I have looked in the layout editor and the field is certainly labelled "Registry Category".
I have tried listing all of the fields using the ContactFieldDescriptor type for the contact.Fields collection. This is a problem for multiple fields but not all.
That looks like C#, so my example below (vb.net) may not be the best for you, but I still think it'll help out with the flow of things. One of the issues I've been exposed to in my not so deep knowledge of the ACT SDKs is that the most defined field descriptors generally don't work (i.e. ContactFieldDescriptor, CompanyFieldDescriptor, etc.). You have to go a level lower, which is the MutableEntityFieldDescriptor.
Below is a routine (not 100% complete) that creates a DataTable and loads all Contact information into it (skipping any columns that are in a list to ignore). It uses the MutableEntityFieldDescriptor object to get the value for the given contact. This is pretty generic, so with a few changes it could also be applied to other entities like Companies, Opportunities, etc.
Dim actf As Act.Framework.ActFramework
Try
actf = New Act.Framework.ActFramework
actf.LogOn(strLiveDB, userName, password)
Dim conList As Act.Framework.Contacts.ContactList
conList = actf.Contacts.GetContacts(Nothing, Nothing, Nothing) 'get all contacts
dt = New DataTable
dt.Columns.Add("ID", GetType(String))
Dim fds() As Act.Framework.MutableEntities.MutableEntityFieldDescriptor = actf.Contacts.GetMutableEntityFieldDescriptors() 'get all field descriptors for Contacts
For Each fd As Act.Framework.MutableEntities.MutableEntityFieldDescriptor In fds 'loop through all descriptors
If columnsToIgnore.Contains(fd.DisplayName) = False Then 'check for columns to ignore (just a string list of field names)
Dim dc As New DataColumn(fd.DisplayName)
Select Case fd.ACTFieldType
Case Is = Act.Framework.Database.FieldDataType.Character, Act.Framework.Database.FieldDataType.Memo
dc.DataType = GetType(String)
Case Is = Act.Framework.Database.FieldDataType.Date, Act.Framework.Database.FieldDataType.DateTime
dc.DataType = GetType(DateTime)
Case Is = Act.Framework.Database.FieldDataType.YesNo
dc.DataType = GetType(Boolean)
Case Is = Act.Framework.Database.FieldDataType.Number, Act.Framework.Database.FieldDataType.Currency, Act.Framework.Database.FieldDataType.Decimal, Act.Framework.Database.FieldDataType.TinyInt
dc.DataType = GetType(Double)
End Select
dt.Columns.Add(dc)
End If
Next
For Each con As Act.Framework.Contacts.Contact In conList 'loop through all contacts
Dim dr As DataRow = dt.NewRow
dr("ID") = con.ID.ToString
For Each fd As Act.Framework.MutableEntities.MutableEntityFieldDescriptor In fds 'loop through all field descriptors
If columnsToIgnore.Contains(fd.DisplayName) = False Then
Dim obj As Object = fd.GetValue(con) 'GET THE VALUE OF THE FIELD FOR THE SPECIFIC CONTACT!
If obj Is Nothing Then
dr(fd.DisplayName) = DBNull.Value
Else
dr(fd.DisplayName) = obj
End If
End If
Next
dt.Rows.Add(dr)
Next
Catch ex As Exception
MessageBox.Show(ex.Message & Environment.NewLine & Environment.NewLine & ex.StackTrace, "Error Getting Contact Data", MessageBoxButtons.OK, MessageBoxIcon.Error)
Finally
If actf IsNot Nothing Then
actf.LogOff()
End If
End Try
