CreateFeatureClass error for lines but not for polygons or points

AxelThomas — Thu, 09 Feb 2012 13:34:37 GMT

Hi all,
I am creating shape files with simple code that works fine for polygon or point shape files. For line shape files the code however fails at the FeatureWorkspace.CreateFeatureClass command (highlighted in code below). I guess it's just a pretty dumb mistake...
Any help is appreciated!

Axel

Sub CreateShape(sDBPath As String, sOutShapeName As String, lBID As Long)

Dim pWkSp As IWorkspace, pShWkSpF As IWorkspaceFactory, pFWkSp As IFeatureWorkspace
Dim pOutShapeFCls As IFeatureClass
Dim pPolygon As IPolygon, pF As IFeature
Dim pField As IField, pFieldEdit As IFieldEdit
Dim pFields As IFields, pFieldsEdit As IFieldsEdit
Dim pGeomDefEdit As IGeometryDefEdit, cGeomTyp As esriGeometryType
Dim pCLSID As UID
Dim sFeldname As String
Dim iNFields As Integer, iFI As Integer

Set pShWkSpF = New ShapefileWorkspaceFactory
Set pWkSp = pShWkSpF.OpenFromFile(sDBPath, 0)
Set pFWkSp = pWkSp
If pFWkSp Is Nothing Then Exit Sub

If sOutShapeName Like "*poly*" Then
    cGeomTyp = esriGeometryPolygon
    iNFields = 13
    sFeldname = "POLY-ID"
ElseIf sOutShapeName Like "*line*" Then
    cGeomTyp = esriGeometryPolyline
    iNFields = 17
    sFeldname = "ARC-ID"
ElseIf sOutShapeName Like "*dot*" Then
    cGeomTyp = esriGeometryPoint
    iNFields = 14
    sFeldname = "POINT-ID"
Else
    MsgBox "File name not accepted", vbCritical
    Exit Sub
End If

Set pFields = New Fields
Set pFieldsEdit = pFields
Set pField = New Field
pFieldsEdit.FieldCount = iNFields
iFI = 0

Set pGeomDefEdit = New GeometryDef                           ' Geometry field
With pGeomDefEdit
    .GeometryType = cGeomTyp
    .HasM = False
    .HasZ = False
    Set .SpatialReference = SetProjection       ' set in a separate function, not included in this post
End With

Set pFieldEdit = New Field
With pFieldEdit
    .AliasName = "FID"
    .Name = "FID"
    .Type = esriFieldTypeOID
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

Set pFieldEdit = New Field
With pFieldEdit
    .Name = "Shape"
    .AliasName = "Geometry"
    .Type = esriFieldTypeGeometry
    Set .GeometryDef = pGeomDefEdit
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

If Not cGeomTyp = esriGeometryLine Then
    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "AREA"
      .AliasName = "Area"
      .Precision = 20
      .Scale = 0
      .Type = esriFieldTypeDouble
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1

    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "PERIMETER"
      .AliasName = "Perimeter"
      .Precision = 20
      .Scale = 0
      .Type = esriFieldTypeDouble
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1
End If

If cGeomTyp = esriGeometryLine Then
    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "FNODE"
      .AliasName = "FNODE"
      .Precision = 11
      .Scale = 0
      .Type = esriFieldTypeDouble
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1

    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "TNODE"
      .AliasName = "TNODE"
      .Precision = 11
      .Scale = 0
      .Type = esriFieldTypeDouble
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1

    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "LPOLY"
      .AliasName = "LPOLY"
      .Precision = 11
      .Scale = 0
      .Type = esriFieldTypeDouble
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1

    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "RPOLY"
      .AliasName = "RPOLY"
      .Precision = 11
      .Scale = 0
      .Type = esriFieldTypeDouble
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1

    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "LENGTH"
      .AliasName = "LENGTH"
      .Precision = 11
      .Scale = 0
      .Type = esriFieldTypeDouble
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1
End If

Set pFieldEdit = New Field
With pFieldEdit
    .Name = "SYS_ID"
    .AliasName = "SYS_ID"
    .Precision = 2
    .Scale = 0
    .Type = esriFieldTypeSingle
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

Set pFieldEdit = New Field
With pFieldEdit
    .Name = sFeldname
    .AliasName = sFeldname
    .Precision = 2
    .Scale = 0
    .Type = esriFieldTypeSingle
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

Set pFieldEdit = New Field
With pFieldEdit
    .Name = "BLATT_ID"
    .AliasName = "BLATT_ID"
    .Precision = 6
    .Scale = 6
    .Type = esriFieldTypeInteger
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

If Not cGeomTyp = esriGeometryPolygon Then
    Set pFieldEdit = New Field
    With pFieldEdit
      .Name = "SCHNITT_ID"
      .AliasName = "SCHNITT_ID"
      .Precision = 6
      .Scale = 6
      .Type = esriFieldTypeInteger
    End With
    Set pFieldsEdit.Field(iFI) = pFieldEdit
    iFI = iFI + 1
End If

Set pFieldEdit = New Field
With pFieldEdit
    .Name = "BETRIEB"
    .AliasName = "Betrieb"
    .Length = 254
    .Type = esriFieldTypeString
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

Set pFieldEdit = New Field
With pFieldEdit
    .Name = "BLATTNAME"
    .AliasName = "Blattname"
    .Length = 65
    .Type = esriFieldTypeString
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

Set pFieldEdit = New Field
With pFieldEdit
    .Name = "RASTERBILD"
    .AliasName = "Rasterbild"
    .Length = 25
    .Type = esriFieldTypeString
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

   Set pFieldEdit = New Field
With pFieldEdit
    .Name = "CD_NAME"
    .AliasName = "CD_Name"
    .Length = 20
    .Type = esriFieldTypeString
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

   Set pFieldEdit = New Field
With pFieldEdit
    .Name = "HOTLINK"
    .AliasName = "Hotlink"
    .Length = 80
    .Type = esriFieldTypeString
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit
iFI = iFI + 1

   Set pFieldEdit = New Field
    With pFieldEdit
    .Name = "BEMERKUNG"
    .AliasName = "Bemerkung"
    .Length = 60
    .Type = esriFieldTypeString
End With
Set pFieldsEdit.Field(iFI) = pFieldEdit

Set pCLSID = New UID
pCLSID.Value = "esriGeodatabase.Feature"

Set pOutShapeFCls = pFWkSp.CreateFeatureClass(sOutShapeName, pFields, pCLSID, Nothing, esriFTSimple, "Shape", "") ' code fails here
If pOutShapeFCls Is Nothing Then Exit Sub
Set pF = pOutShapeFCls.CreateFeature
If pF Is Nothing Then Exit Sub
lFld = pF.Fields.FindField("BLATT_ID")
If lFld > -1 Then pF.Value(lFld) = lBID
pF.Store

End Sub

Re: CreateFeatureClass error for lines but not for polygons or points

sapnas — Thu, 09 Feb 2012 14:21:23 GMT

Are you adding all 17 fields to pFieldsEdit?

Re: CreateFeatureClass error for lines but not for polygons or points

AxelThomas — Fri, 10 Feb 2012 06:02:53 GMT

Yes - might this be an issue? It works fine with the 13 or 14 fields for point and polygon shape files.

Axel

Re: CreateFeatureClass error for lines but not for polygons or points

NeilClemmons — Fri, 10 Feb 2012 12:28:42 GMT

The geometry type for a line feature class is esriGeometryPolyline. You're using the correct geometry type when creating the geometry definition but your tests on whether to create the fields or not are using esriGeometryLine. This is causing the code to create all of the fields. Also, a better way to add new fields is to create the field object then call IFieldsEdit::AddField. You don't set the FieldCount property when you do this because AddField will increment it for you automatically.

Re: CreateFeatureClass error for lines but not for polygons or points

AxelThomas — Mon, 13 Feb 2012 06:34:09 GMT

Neil,
thanks - setting esriGeometryPolyline consistently througout the code did the job.

Regards,
Axel

topic Re: CreateFeatureClass error for lines but not for polygons or points in ArcObjects SDK Questions

CreateFeatureClass error for lines but not for polygons or points

Re: CreateFeatureClass error for lines but not for polygons or points

Re: CreateFeatureClass error for lines but not for polygons or points

Re: CreateFeatureClass error for lines but not for polygons or points

Re: CreateFeatureClass error for lines but not for polygons or points