IFieldsEdit.AddField() throws HRESULT: 0x80040705

[SebastianKrings]

Hello,

I want to create a feature Class within a Geodatabase (the code below).
When computing

IFieldsEdit.AddField(IFieldEdit)

it crashes and returns

"Exception from HRESULT: 0x80040705"

It wouold be grateful if somebody could get any help or ideas to solve this problem.
Thanks!


Here are some object-values at runtime:

IFieldsEdit:

base {System.__ComObject} System.MarshalByRefObject {System.__ComObject}
[INDENT]__identity null object
Identity null object
m_ObjectToDataMap null System.Collections.Hashtable[/INDENT]
FieldCount 2 int

IFieldEdit:

oidFieldEdit {ESRI.ArcGIS.Geodatabase.FieldClass} ESRI.ArcGIS.Geodatabase.IFieldEdit {ESRI.ArcGIS.Geodatabase.FieldClass}
[INDENT][ESRI.ArcGIS.Geodatabase.FieldClass] {ESRI.ArcGIS.Geodatabase.FieldClass} ESRI.ArcGIS.Geodatabase.FieldClass
[INDENT]AliasName "OID" string
DataType {System.__ComObject} ESRI.ArcGIS.Geodatabase.IGPDataType {System.__ComObject}
DefaultValue {} dynamic {System.DBNull}
Domain null ESRI.ArcGIS.Geodatabase.IDomain
DomainFixed false bool
Editable false bool
GeometryDef null ESRI.ArcGIS.Geodatabase.IGeometryDef
IField2_AliasName "OID" string
IField2_DefaultValue {} dynamic {System.DBNull}
IField2_Domain null ESRI.ArcGIS.Geodatabase.IDomain
IField2_DomainFixed false bool
IField2_Editable false bool
IField2_GeometryDef null ESRI.ArcGIS.Geodatabase.IGeometryDef
IField2_IsNullable false bool
IField2_Length 4 int
IField2_Name "OID" string
IField2_Precision 0 int
IField2_Required true bool
IField2_Scale 0 int
IField2_Type esriFieldTypeOID ESRI.ArcGIS.Geodatabase.esriFieldType
IField2_VarType 3 int
IFieldEdit2_AliasName "OID" string
IFieldEdit2_DefaultValue {} dynamic {System.DBNull}
IFieldEdit2_Domain null ESRI.ArcGIS.Geodatabase.IDomain
IFieldEdit2_DomainFixed false bool
IFieldEdit2_Editable false bool
IFieldEdit2_GeometryDef null ESRI.ArcGIS.Geodatabase.IGeometryDef
IFieldEdit2_IsNullable false bool
IFieldEdit2_Length 4 int
IFieldEdit2_Name "OID" string
IFieldEdit2_Precision 0 int
IFieldEdit2_RasterDef null ESRI.ArcGIS.Geodatabase.IRasterDef
IFieldEdit2_Required true bool
IFieldEdit2_Scale 0 int
IFieldEdit2_Type esriFieldTypeOID ESRI.ArcGIS.Geodatabase.esriFieldType
IFieldEdit2_VarType 3 int
IFieldEdit_AliasName "OID" string
IFieldEdit_DefaultValue {} dynamic {System.DBNull}
IFieldEdit_Domain null ESRI.ArcGIS.Geodatabase.IDomain
IFieldEdit_DomainFixed false bool
IFieldEdit_Editable false bool
IFieldEdit_GeometryDef null ESRI.ArcGIS.Geodatabase.IGeometryDef
IFieldEdit_IsNullable false bool
IFieldEdit_Length 4 int
IFieldEdit_Name "OID" string
IFieldEdit_Precision 0 int
IFieldEdit_Required true bool
IFieldEdit_Scale 0 int
IFieldEdit_Type esriFieldTypeOID ESRI.ArcGIS.Geodatabase.esriFieldType
IFieldEdit_VarType 3 int
IsNullable false bool
Length 4 int
ModelName "OID" string
Name "OID" string
Precision 0 int
RasterDef null ESRI.ArcGIS.Geodatabase.IRasterDef
Required true bool
Scale 0 int
Type esriFieldTypeOID ESRI.ArcGIS.Geodatabase.esriFieldType
VarType 3 int[/INDENT]
AliasName "OID" string
DefaultValue {} dynamic {System.DBNull}
Domain null ESRI.ArcGIS.Geodatabase.IDomain
DomainFixed false bool
Editable false bool
GeometryDef null ESRI.ArcGIS.Geodatabase.IGeometryDef
IsNullable false bool
Length 4 int
Name "OID" string
Precision 0 int
Required true bool
Scale 0 int
Type esriFieldTypeOID ESRI.ArcGIS.Geodatabase.esriFieldType
VarType 3 int[/INDENT]

and this is the code i want to run:

public IFeatureClass CreateFeatureClassInWorkspace(String featureClassName, IFeatureWorkspace featureWorkspace)
        {
            try
            {
                // Instantiate a feature class description to get the required fields.
                IFeatureClassDescription fcDescription = new FeatureClassDescriptionClass();
                IObjectClassDescription ocDescription = (IObjectClassDescription) fcDescription;
                IFields fields = ocDescription.RequiredFields;
                IFieldsEdit fieldsEdit = (IFieldsEdit)fields;

                // Add an object ID field to the fields collection. This is mandatory for feature classes.
                IField oidField = new FieldClass();
                IFieldEdit oidFieldEdit = (IFieldEdit)oidField;
                oidFieldEdit.Name_2 = "OID";
                oidFieldEdit.Type_2 = esriFieldType.esriFieldTypeOID;
                fieldsEdit.AddField(oidFieldEdit);

                // Create a geometry definition (and spatial reference) for the feature class.
                IGeometryDef geometryDef = new GeometryDefClass();
                IGeometryDefEdit geometryDefEdit = (IGeometryDefEdit)geometryDef;
                geometryDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;
                ISpatialReferenceFactory spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
                ISpatialReference spatialReference =
                spatialReferenceFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_NAD1983UTM_20N);
                ISpatialReferenceResolution spatialReferenceResolution = (ISpatialReferenceResolution)spatialReference;
                spatialReferenceResolution.ConstructFromHorizon();
                ISpatialReferenceTolerance spatialReferenceTolerance = (ISpatialReferenceTolerance)spatialReference;
                spatialReferenceTolerance.SetDefaultXYTolerance();
                geometryDefEdit.SpatialReference_2 = spatialReference;

                // Add a geometry field to the fields collection. This is where the geometry definition is applied.
                IField geometryField = new FieldClass();
                IFieldEdit geometryFieldEdit = (IFieldEdit)geometryField;
                geometryFieldEdit.Name_2 = "Shape";
                geometryFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
                geometryFieldEdit.GeometryDef_2 = geometryDef;
                fieldsEdit.AddField(geometryField);

                // Add a Name text field to the required fields.
                IField field = new FieldClass();
                IFieldEdit fieldEdit = (IFieldEdit)field;
                fieldEdit.Name_2 = "Name";
                fieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
                fieldsEdit.AddField(field);

                // Use IFieldChecker to create a validated fields collection.
                IFieldChecker fieldChecker = new FieldCheckerClass();
                IEnumFieldError enumFieldError = null;
                IFields validatedFields = null;
                fieldChecker.ValidateWorkspace = (IWorkspace)featureWorkspace;
                fieldChecker.Validate(fields, out enumFieldError, out validatedFields);

                // The enumFieldError enumerator can be inspected at this point to determine 
                // which fields were modified during validation.

                // Create the feature class.
                IFeatureClass featureClass = featureWorkspace.CreateFeatureClass
                  (featureClassName, validatedFields, ocDescription.InstanceCLSID,
                  ocDescription.ClassExtensionCLSID, esriFeatureType.esriFTSimple,
                  fcDescription.ShapeFieldName, "");
                return featureClass;
            }
            catch (Exception e)
            {
                Console.WriteLine(e.StackTrace);
                throw e;
            }

Thanks.

[JohnHauck]

In .NET you need to append "_2" to the property you want to set on this interface. This is mentioned in the IFieldsEdit documentation.

[NeilClemmons]

It looks like you're adding the required fields with this line:

IFields fields = ocDescription.RequiredFields;

The OID is a required field so I imagine you're getting the error because you're trying to add it a second time with this code.

// Add an object ID field to the fields collection. This is mandatory for feature classes.
                IField oidField = new FieldClass();
                IFieldEdit oidFieldEdit = (IFieldEdit)oidField;
                oidFieldEdit.Name_2 = "OID";
                oidFieldEdit.Type_2 = esriFieldType.esriFieldTypeOID;
                fieldsEdit.AddField(oidFieldEdit);

[SebastianKrings]

Hi
thanks a lot.

Do you know which Fields are all Required Field?
I would expect that OID ans Shape are the required fields.
Or are there some more Fields?

[NeilClemmons]

Refer to the developer help topic for IObjectClassDescription.RequiredFields.  You can also loop through the Fields object it returns and see what fields it put in there.