太晚了，直接连接的源代码：

/// 
        /// TIN生成等高线        /// 
        /// 等高线间距        public void Tin2Contour(string path_,string name_,double pInterval)        {            //获取TIN            ITinLayer pTinlayer = GetLayerByName(pScene , comboBox_TIN.Text) as ITinLayer;            ITin pTin = pTinlayer.Dataset as ITin;            //创建Contour shape            IWorkspaceFactory pWSFac = new ShapefileWorkspaceFactoryClass();            IFeatureWorkspace pFeatureWS = pWSFac.OpenFromFile(path_ , 0) as IFeatureWorkspace;            if (System.IO.File.Exists(path_+"\\"+name_+".shp"))            {                System.IO.File.Delete(path_ + "\\" + name_ + ".shp");                System.IO.File.Delete(path_ + "\\" + name_ + ".dbf");                System.IO.File.Delete(path_ + "\\" + name_ + ".shx");            }            IFields pFields = CreateShapeFields(esriGeometryType.esriGeometryPolyline);            pFeatureWS.CreateFeatureClass(name_ , pFields , null , null , esriFeatureType.esriFTSimple , "Shape" , null);                       IFeatureClass pContourFeatureClass = pFeatureWS.OpenFeatureClass(name_);                     //生成等高线            ITinSurface pTinSurface = pTin as ITinSurface;            pTinSurface.Contour(0 , pInterval , pContourFeatureClass , "Contour" , 0);            //加入等高线图层            IFeatureLayer pFeatureLayer = new FeatureLayerClass();            pFeatureLayer.FeatureClass = pContourFeatureClass;                      IGeoFeatureLayer pGeoFeatureLayer = pFeatureLayer as IGeoFeatureLayer;            pGeoFeatureLayer.DisplayAnnotation = true;            pGeoFeatureLayer.DisplayField = "Contour";            pGeoFeatureLayer.Name = pContourFeatureClass.AliasName + "_Contour";            //设置线样式            ILineSymbol pLineSymbol = new SimpleLineSymbolClass();            pLineSymbol.Color = GetRGBColor(32 , 47 , 247);            pLineSymbol.Width = 2;            ISimpleRenderer pRender = pGeoFeatureLayer.Renderer as ISimpleRenderer;            pRender.Symbol = pLineSymbol as ISymbol;            pScene.AddLayer(pFeatureLayer as ILayer);        }

#region 创建几何字段        /// 
        /// 创建几何字段        /// 
        ///         /// 
             public IFields CreateShapeFields(esriGeometryType p_esriGeotype)        {            IFields pFields = new FieldsClass();            IFieldsEdit pFieldsEdit = pFields as IFieldsEdit;            IGeometryDef pGeoDef = new GeometryDefClass();            IGeometryDefEdit pGeoDefEdit = pGeoDef as IGeometryDefEdit;            pGeoDefEdit.GeometryType_2 = p_esriGeotype;            pGeoDefEdit.SpatialReference_2 = (ISpatialReference) new UnknownCoordinateSystem();            IField pFld = new FieldClass();            IFieldEdit pFldEdit = pFld as IFieldEdit;            pFldEdit.Name_2 = "shape";            pFldEdit.IsNullable_2 = false;            pFldEdit.Type_2 = esriFieldType.esriFieldTypeGeometry;            pFldEdit.GeometryDef_2 = pGeoDef;            pFieldsEdit.AddField(pFld);            return pFields;        }        #endregion               #region 依据名称获取图层        //依据名称获取图层        public ILayer GetLayerByName(IScene scene , string strLayerName)        {            ILayer pLayer = null;            for (int i = 0;i < scene.LayerCount;i++)            {                pLayer = scene.get_Layer(i);                if (strLayerName == pLayer.Name)                {                    break;                }            }            return pLayer;        }        #endregion

Contour功能说明参考帮助文档。

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