ArcGIS Engine代码共享-字段（Field）操作

 public class FieldHelper    {        // Methods        public static IField CreateDoubleField(string pFieldName, int pFieldLen, int pFieldScale)        {            FieldClass class2 = new FieldClass();            IFieldEdit edit = class2;            edit.Name_2 = pFieldName;            edit.Type_2 = esriFieldType.esriFieldTypeDouble;            edit.Precision_2 = pFieldLen;            edit.Scale_2 = pFieldScale;            return class2;        }        public static IField CreateGeometryField(esriGeometryType pGT, ISpatialReference pSR)        {            return CreateGeometryField(pGT, pSR, false);        }        public static IField CreateGeometryField(esriGeometryType pGT, ISpatialReference pSR, bool pHasZ)        {            FieldClass class2 = new FieldClass();            IFieldEdit edit = class2;            edit.Name_2 = "SHAPE";            edit.AliasName_2 = "图形对象";            edit.Type_2 = esriFieldType.esriFieldTypeGeometry;            IGeometryDef pGeoDef = new GeometryDefClass();            IGeometryDefEdit class3 = (IGeometryDefEdit)pGeoDef;            class3.GeometryType_2 = pGT;            class3.HasM_2 = false;            class3.HasZ_2 = pHasZ;            class3.GridCount_2 = 1;            class3.set_GridSize(0, 1000.0);            class3.SpatialReference_2 = pSR;            edit.GeometryDef_2 = class3;            return class2;        }        public static IField CreateIntField(string pFieldName, int pFieldLen)        {            FieldClass class2 = new FieldClass();            IFieldEdit edit = class2;            edit.Name_2 = pFieldName;            edit.Precision_2 = pFieldLen;            edit.Type_2 = esriFieldType.esriFieldTypeInteger;            return class2;        }        public static IField CreateOIDField()        {            FieldClass class2 = new FieldClass();            IFieldEdit edit = class2;            edit.Name_2 = "OBJECTID";            edit.AliasName_2 = "表内唯一编号";            edit.Type_2 = esriFieldType.esriFieldTypeOID;            return class2;        }        public static IField CreateRasterField(string pName, string pAliasName, ISpatialReference pSR)        {            FieldClass class2 = new FieldClass();            IFieldEdit edit = class2;            edit.Name_2 = pName;            edit.AliasName_2 = pAliasName;            edit.Type_2 = esriFieldType.esriFieldTypeRaster;            IRasterDef def = new RasterDefClass();            def.IsRasterDataset = false;            def.SpatialReference = pSR;            (edit as IFieldEdit2).RasterDef = def;            return class2;        }        public static IField CreateTextField(string pName, string pAliasName, int aWidth)        {            FieldClass class2 = new FieldClass();            IFieldEdit edit = class2;            edit.Name_2 = pName.ToUpper();            edit.AliasName_2 = pAliasName;            edit.Type_2 = esriFieldType.esriFieldTypeString;            edit.Length_2 = aWidth;            return class2;        }        public static int QueryFieldLength(IField paramFld)        {            if ((paramFld.Type == esriFieldType.esriFieldTypeSingle) || (paramFld.Type == esriFieldType.esriFieldTypeDouble))            {                return paramFld.Precision;            }            if (paramFld.Type == esriFieldType.esriFieldTypeInteger)            {                return paramFld.Length;            }            return paramFld.Length;        }        public static int QueryFieldPrecision(IField paramFld)        {            if ((paramFld.Type == esriFieldType.esriFieldTypeSingle) || (paramFld.Type == esriFieldType.esriFieldTypeDouble))            {                return paramFld.Scale;            }            return 0;        }        public static string QueryFieldTypeName(esriFieldType paramFT)        {            string str = "";            if (esriFieldType.esriFieldTypeBlob == paramFT)            {                return "二进制";            }            if (esriFieldType.esriFieldTypeDate == paramFT)            {                return "日期";            }            if (esriFieldType.esriFieldTypeDouble == paramFT)            {                return "浮点数";            }            if (esriFieldType.esriFieldTypeGeometry == paramFT)            {                return "图形对象";            }            if (esriFieldType.esriFieldTypeGlobalID == paramFT)            {                return "全局编号";            }            if (esriFieldType.esriFieldTypeGUID == paramFT)            {                return "永久唯一编号";            }            if (esriFieldType.esriFieldTypeInteger == paramFT)            {                return "整型";            }            if (esriFieldType.esriFieldTypeOID == paramFT)            {                return "表内编号";            }            if (esriFieldType.esriFieldTypeRaster == paramFT)            {                return "影像图";            }            if (esriFieldType.esriFieldTypeSingle == paramFT)            {                return "浮点数";            }            if (esriFieldType.esriFieldTypeSmallInteger == paramFT)            {                return "短整型";            }            if (esriFieldType.esriFieldTypeString == paramFT)            {                str = "字符串";            }            return str;        }        public static IField QueryField(IFields pFields, string sName)        {            IField pField = null;            int n = pFields.FindField(sName);            if (n > -1)            {                pField = pFields.get_Field(n);                return pField;            }            return pField;        }        public static IField AlterGeometryFieldSR(IField pField, ISpatialReference sr)        {            IFieldEdit pEdit = pField as IFieldEdit;            IGeometryDef pGeoDef = pField.GeometryDef;            IGeometryDefEdit pDEdit = pGeoDef as IGeometryDefEdit;            pDEdit.SpatialReference_2 = sr;            pEdit.GeometryDef_2 = pGeoDef;            return pField;        }        public static IField AlterRasterFieldSR(IField pField, ISpatialReference sr)        {            IFieldEdit2 pEdit = pField as IFieldEdit2;            IRasterDef pRDef = pEdit.RasterDef;            pRDef.SpatialReference = sr;            return pField;        }    }