.CreateFeatureClass报错原因解析

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1.Microsoft Jet 数据库引擎找不到输入表或查询 ‘GDB_DataChanges’。 确定它是否存在，以及它的名称的拼写是否正确。
我发现在百度上是找不到关于这个几个关键字的信息的，因此本菜鸟翻越长城，找到了解决办法，详细见下。我没有仔细看下面说明，因为英文实在是憋足。但我估计是9.3和10.0的AE开发版本不同，应该是老版本需要使用IWorkspaceEdit的StarEditing()方法和StopEditing()方法。
主要解决办法就是通过IWorkspaceEdit的StarEditing()方法和StopEditing()方法，在两个方法运行中间进行CreateFeatureClass。
原地址：http://gis.stackexchange.com/questions/103949/create-featureclass-in-personal-geodatabase-and-store-data
原因说明：https://geonet.esri.com/thread/45118

下面是个从无空间定义的mdb数据转换成有空间数据的FeatureClass的例子，错误字段在IEnumFieldsError 类中保存，遍历可以获取错误信息。

      private IFeatureClass CreateFeatureClass(IFeatureWorkspace pfws)        {            if (pDemoFeatureClass == null) return null;            List<NewFieldClass> lFields = pDemoFeatureClass.Fields;            IFeatureWorkspace pFeatureWorkspace = pfws;            IFields pFields = new FieldsClass();            IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;            IFieldEdit pFieldEdit = new FieldClass();            #region esriFieldType            foreach (NewFieldClass nField in lFields)            {                pFieldEdit = new FieldClass();                if (nField.FieldType == 0||nField.FieldType == 4)                     continue;                pFieldEdit.Name_2 = nField.Name;                pFieldEdit.AliasName_2 = nField.AliasName;                switch (nField.FieldType)                {                    case 0: break;                    case 1: pFieldEdit.Type_2 = esriFieldType.esriFieldTypeString; break;                    case 2: pFieldEdit.Type_2 = esriFieldType.esriFieldTypeDouble; break;                    case 3: pFieldEdit.Type_2 = esriFieldType.esriFieldTypeInteger; break;                    case 4: pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry; break;                    default: break;                }                switch (nField.IsNullable)                {                    case 0: pFieldEdit.IsNullable_2 = false; break;                    case 1: pFieldEdit.IsNullable_2 = true; break;                    default: pFieldEdit.IsNullable_2 = true; break;                }                //switch (nField.Check)                //{                //    case 0: break;                //    case 1: break;                //    default: break;                //}                pFieldEdit.Length_2 = nField.FieldLength;                pFieldsEdit.AddField(pFieldEdit as IField);            }            #endregion            //设置空间属性字段            //Domain            ISpatialReference pSpatialReference = new UnknownCoordinateSystemClass();            pSpatialReference.SetDomain(-99999999, 99999999, -99999999, 99999999);            pSpatialReference.SetZDomain(-99999999, 99999999);            pSpatialReference.SetMDomain(-99999999, 99999999);              //空间字段设计            pFieldEdit = new FieldClass();            pFieldEdit.Name_2 = "SHAPE";            pFieldEdit.AliasName_2 = "SHAPE";            IGeometryDef pGDef = new GeometryDefClass();            IGeometryDefEdit pGDefEdit = pGDef as IGeometryDefEdit;            string GeoType = pDemoFeatureClass.Name.Substring(pDemoFeatureClass.Name.LastIndexOf("_")).ToUpper();            if (GeoType.Contains("_L"))                pGDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolyline;            else if (GeoType.Contains("_P"))                pGDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPoint;            pGDefEdit.SpatialReference_2 = pSpatialReference;            //设置空坐标系↓                        pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;            pFieldEdit.GeometryDef_2 = pGDef;            pFieldsEdit.AddField(pFieldEdit as IField);            pFieldEdit.GeometryDef_2 = pGDef;            //创建一个Validated Fields集合              IFieldChecker fieldChecker = new FieldCheckerClass();            IEnumFieldError enumFieldError = null;            IFields validatedFields = null;            fieldChecker.ValidateWorkspace = (IWorkspace)pfws;            fieldChecker.Validate(pFields, out enumFieldError, out validatedFields);            if (enumFieldError != null)            {                IFieldError pError = enumFieldError.Next();                while (pError != null)                {                    pError.FieldError.ToString();                    pError.FieldIndex.ToString();                    pError = enumFieldError.Next();                }            }            UID pUidClsId = new UIDClass();            UID pUidClsExt = new UIDClass();            esriFeatureType pFeatureType = esriFeatureType.esriFTSimple;            #region pUidClsID字段为空时            if (pUidClsId == null)            {                pUidClsId = new UIDClass();                switch (pFeatureType)                {                    case (esriFeatureType.esriFTSimple):                        //if (pGeometryType == esriGeometryType.esriGeometryLine)                        //    pGeometryType = esriGeometryType.esriGeometryPolyline;                        pUidClsId.Value = "{52353152-891A-11D0-BEC6-00805F7C4268}";                        break;                    case (esriFeatureType.esriFTSimpleJunction):                        //pGeometryType = esriGeometryType.esriGeometryPoint;                        pUidClsId.Value = "{CEE8D6B8-55FE-11D1-AE55-0000F80372B4}";                        break;                    case (esriFeatureType.esriFTComplexJunction):                        pUidClsId.Value = "{DF9D71F4-DA32-11D1-AEBA-0000F80372B4}";                        break;                    case (esriFeatureType.esriFTSimpleEdge):                        //pGeometryType = esriGeometryType.esriGeometryPolyline;                        pUidClsId.Value = "{E7031C90-55FE-11D1-AE55-0000F80372B4}";                        break;                    case (esriFeatureType.esriFTComplexEdge):                        //pGeometryType = esriGeometryType.esriGeometryPolyline;                        pUidClsId.Value = "{A30E8A2A-C50B-11D1-AEA9-0000F80372B4}";                        break;                    case (esriFeatureType.esriFTAnnotation):                        //pGeometryType = esriGeometryType.esriGeometryPolygon;                        pUidClsId.Value = "{E3676993-C682-11D2-8A2A-006097AFF44E}";                        break;                    case (esriFeatureType.esriFTDimension):                        //pGeometryType = esriGeometryType.esriGeometryPolygon;                        pUidClsId.Value = "{496764FC-E0C9-11D3-80CE-00C04F601565}";                        break;                }            }            #endregion            #region pUidClsExt字段为空时            if (pUidClsExt == null)            {                switch (pFeatureType)                {                    case esriFeatureType.esriFTAnnotation:                        pUidClsExt = new UIDClass();                        pUidClsExt.Value = "{24429589-D711-11D2-9F41-00C04F6BC6A5}";                        break;                    case esriFeatureType.esriFTDimension:                        pUidClsExt = new UIDClass();                        pUidClsExt.Value = "{48F935E2-DA66-11D3-80CE-00C04F601565}";                        break;                }            }            #endregion            string pNewFeatureClassName = pDemoFeatureClass.Name.Split('.')[1];            try            {                IFeatureClass pFeatureClass = pFeatureWorkspace.CreateFeatureClass(pNewFeatureClassName,pFields,pUidClsId,pUidClsExt,esriFeatureType.esriFTSimple,"SHAPE",String.Empty);                if (pFeatureClass != null)                    return pFeatureClass;                else return null;            }            catch (Exception e)            {                MessageBox.Show(e.ToString());                return null;            }        }

其实在10.0版本以后，似乎只要Fields数组参数格式标准了（有OID和SHAPE包含GeometryDef）字段后，就不会报错，因此百度上也很少见到这个错误。CreateFeatureClass报错基本都是Fields参数出错。
2.设置GeometryDef_2时，提示 对 COM 组件的调用返回了错误 HRESULT E_FAIL 错误。如下图示：

我找很多教程，发现都不是针对这个的，无意中看见了博客
http://www.cnblogs.com/qiushuixizhao/p/3242685.html 中的写法， 发现别人是先AddField之后再定义这个GeometryDef_2的，因此我改正过顺序，变成：先添加之后再定义GeometryDef_2，发现程序正常运行了。