1、创建Shp文件

IFeatureWorkspace接口的CreateFeatureClass()方法可以产生一个要素类，该要素类被直接放置在工作空间中。

        private void CreateShp()
        {
            //打开shp工作空间
            string fileName = "Some";//shp文件名
            string filePath = @"E:\HiOS\TestShp";//shp文件位置
            IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory();//文件夹
            //IWorkspaceFactory pWorkspaceFactory = new AccessWorkspaceFactoryClass();//Access格式的个人地理数据库
            IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(filePath, 0);
            IFeatureWorkspace pFeatureWorkspace = pWorkspace as IFeatureWorkspace;

            //设置geometry definition
            IGeometryDef pGeometryDef = new GeometryDefClass();
            IGeometryDefEdit pGeometryDefEdit = pGeometryDef as IGeometryDefEdit;
            pGeometryDefEdit.GeometryType_2 = esriGeometryType.esriGeometryPolyline;//点、线、面
            pGeometryDefEdit.SpatialReference_2 = axMapControl1.SpatialReference;

            //建立Shp文件的字段集
            IFields pFields = new FieldsClass();
            IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;
            IField pField = new FieldClass();
            IFieldEdit pFieldEdit = pField as IFieldEdit;

            //建立shape（几何）字段
            pFieldEdit.Name_2 = "Shape";
            pFieldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;
            pFieldEdit.GeometryDef_2 = pGeometryDef;
            pFieldsEdit.AddField(pField);

            //新建ObjectID字段
            pField = new FieldClass();
            pFieldEdit = pField as IFieldEdit;
            pFieldEdit.Name_2 = "ObjectID";
            pFieldEdit.AliasName_2 = "id";
            pFieldEdit.Type_2 = esriFieldType.esriFieldTypeSmallInteger;
            pFieldsEdit.AddField(pField);

            //新建Name字段
            pField = new FieldClass();
            pFieldEdit = pField as IFieldEdit;
            pFieldEdit.Length_2 = 32;
            pFieldEdit.Name_2 = "Name";
            pFieldEdit.AliasName_2 = "Name";
            pFieldEdit.Type_2 = esriFieldType.esriFieldTypeString;
            pFieldsEdit.AddField(pField);

            //最后创建Shp文件
            IFeatureClass pFeatureClass = pFeatureWorkspace.CreateFeatureClass(fileName + ".shp", pFields, null, null, esriFeatureType.esriFTSimple, "Shape", "");
        }

在创建字段的时候，会默认创建FID字段。显示声明字段类型为esriFieldType.esriFieldTypeOID，该字段不会被创建。

2、删除shp文件

        private void DeleteShp()
        {
            //打开shp工作空间
            string fileName = "Some";//shp文件名
            string filePath = @"E:\HiOS\TestShp";//shp文件位置
            IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory();//文件夹
            //IWorkspaceFactory pWorkspaceFactory = new AccessWorkspaceFactoryClass();//Access格式的个人地理数据库
            IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(filePath, 0);
            IFeatureWorkspace pFeatureWorkspace = pWorkspace as IFeatureWorkspace;

            IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass(fileName);//fileName为文件名(不包含路径)
            IDataset pFeaDataset = pFeatureClass as IDataset;
            pFeaDataset.Delete();
        }

OpenFeatureClass()方法可用于打开一个已经存在的要素类。