ArcEngine开发的一些实现

描述：最近在用做arcgis二次开发的一个小项目。由于还是三四年前使用过arcengine了。所有问题都是边学边做。在这儿记录下我实现的一些功能。高手请绕道

文采不行就直接进入主题吧。。。。。

实现一、创建shape面图层时指定填充为空边线为绿色。请看代码

            //添加shape
            IFeatureClass pFeatureClass = pWS.OpenFeatureClass(strShapeName);
            m_feaCla = pFeatureClass;
            IFeatureLayer pFLayer = new FeatureLayerClass(); // 4
            pFLayer.FeatureClass = pFeatureClass;
            pFLayer.Name = pFeatureClass.AliasName; // 5
            ILayer pLayer = pFLayer as ILayer;

            //以下为关键代码
            //设置默认符号
            ISimpleRenderer simpleRen = new SimpleRendererClass();
            IRgbColor pLineColor = new RgbColor();
            pLineColor.Green = 255;
            ILineSymbol ilSymbl = new SimpleLineSymbolClass();
            ilSymbl.Color = pLineColor;
            ilSymbl.Width = 1;



            ISimpleFillSymbol ipSimpleFillSymbol = new SimpleFillSymbol();
            ipSimpleFillSymbol.Outline = ilSymbl;
            RgbColor pFillColor = new RgbColor();
            pFillColor.Green = 60;
            ipSimpleFillSymbol.Color = pFillColor;
            ipSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSNull;//设置成填充效果                            为空，也就是不填充，有很多填充效果，这是个枚举
            simpleRen.Symbol = (ISymbol)ipSimpleFillSymbol;
            IGeoFeatureLayer geoFea = (IGeoFeatureLayer)pFLayer;
            geoFea.Renderer = (IFeatureRenderer)simpleRen;
            //以上为关键代码

            axMapControl1.Map.AddLayer(pLayer);
            axMapControl1.ActiveView.Refresh();

实现二、在axTOCControl点击符号打开符号选择器。请看代码

                 //符号设置
                if (axMapControl1.LayerCount > 0)
                {
                    esriTOCControlItem toccItem = esriTOCControlItem.esriTOCControlItemNone;
                    IBasicMap iBasicMap = null;
                    object unk = null;
                    object data = null;
                    ILayer player = null;
                    axTOCControl1.HitTest(e.x, e.y, ref toccItem, ref iBasicMap, ref player, ref unk, ref data);
                    if (e.button == 1)
                    {        
                        if (toccItem == esriTOCControlItem.esriTOCControlItemLegendClass)
                        {
                            ESRI.ArcGIS.Carto.ILegendClass pLC = new LegendClassClass();
                            ESRI.ArcGIS.Carto.ILegendGroup pLG = new LegendGroupClass();
                            if (unk is ILegendGroup)
                            {
                                pLG = (ILegendGroup)unk;
                            }
                            pLC = pLG.get_Class((int)data);
                            ISymbol pSym;
                            pSym = pLC.Symbol;
                            ESRI.ArcGIS.DisplayUI.ISymbolSelector pSS = new
                                ESRI.ArcGIS.DisplayUI.SymbolSelectorClass();
                            bool bOK = false;
                            pSS.AddSymbol(pSym);
                            bOK = pSS.SelectSymbol(0);
                            if (bOK)
                            {
                                pLC.Symbol = pSS.GetSymbolAt(0) as ISymbol;
                                
                            }
                            
                            this.axMapControl1.ActiveView.Refresh();
                            this.axTOCControl1.Refresh();
                        }
                    }
                   
                }
           

实现三、旋转几何，使用代码的时候注意变量的赋值就可以直接使用了。

namespace LabelForm
{
    //class RotateTool
    //{
    //}
    /// <summary>
    /// 旋转元素工具
    /// </summary>
    public sealed class BTGraphicsRotateElement : BaseTool
    {
        #region  成员变量

        private IHookHelper m_hookHelper = null;
        private IPoint m_point;
        private IElement m_element = null;
        public bool m_moving;
     
        IFeatureClass m_FeaCla = null;
        private int n_FeaID = 0;
        IPoint centerPoint;
        /// <summary>
        /// 获取或设置标注图层
        /// </summary>
        public IFeatureLayer AnnotationLayer { get; set; }


        #endregion

        #region 构造函数

        public BTGraphicsRotateElement()
        {
            base.m_category = "";
            base.m_caption = "";
            base.m_message = "";
            base.m_toolTip = "旋转元素";
            base.m_name = "";
            base.m_enabled = false;
            base.m_cursor = Cursors.Default;
           
            try
            {
                base.m_bitmap = Properties.Resources.spin_counterclockwise;
            }
            catch
            {
                base.m_bitmap = null;
            }

        }

        public void SetFeacureClass(IFeatureClass fea)
        {
            m_FeaCla = fea;
        }
        public void SetEnabled(bool isEn)
        {
            base.m_enabled = isEn;
        }
        public BTGraphicsRotateElement(IFeatureLayer annotationLayer)
            : this()
        {
            AnnotationLayer = annotationLayer;
        }
        #endregion

        #region 方法覆写

        public override void OnCreate(object hook)
        {
            try
            {
                m_hookHelper = new HookHelperClass();
                m_hookHelper.Hook = hook;
                if (m_hookHelper.ActiveView == null)
                {
                    m_hookHelper = null;
                }
            }
            catch
            {
                m_hookHelper = null;
            }

            //if (m_hookHelper == null)
            //    base.m_enabled = false;
            //else
            //    base.m_enabled = true;

            // TODO:  Add other initialization code

        }

        public override void OnClick()
        {
            // TODO: Add StationTool.OnClick implementation
            if (m_FeaCla == null)
            {
                return;
            }

            base.m_enabled = true;
        }

        public override void OnMouseDown(int Button, int Shift, int X, int Y)
        {
            if (base.m_enabled == false)
            {
                return;
            }
            if (Button == 1)
            {
                IGraphicsContainer pGraphicsContainer = m_hookHelper.ActiveView as IGraphicsContainer;
                m_point = m_hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
                
                ISelection selection = m_hookHelper.FocusMap.FeatureSelection;
               
                IEnumFeatureSetup iEnumFeatureSetup = (IEnumFeatureSetup)selection;
                iEnumFeatureSetup.AllFields = true;
                IEnumFeature enumFeature = (IEnumFeature)iEnumFeatureSetup;
                enumFeature.Reset();
                IFeature fre = enumFeature.Next();
                n_FeaID = fre.OID;
                m_element = new RectangleElement();
                m_element.Geometry = fre.Shape;
                IArea arr = fre.Shape as IArea;
                centerPoint = arr.LabelPoint;
                m_moving = true;
            }
        }

        public override void OnMouseMove(int Button, int Shift, int X, int Y)
        {
            if (base.m_enabled == false)
            {
                return;
            }
            if (Button == 1)
            {
                if (!m_moving) return;

                    IDataset pDataset = (IDataset)m_FeaCla;
                    IWorkspaceEdit pWorkspaceEdit = (IWorkspaceEdit)pDataset.Workspace;
                    pWorkspaceEdit.StartEditing(true);
                    pWorkspaceEdit.StartEditOperation();
                    pWorkspaceEdit.EnableUndoRedo();



                    object missing = Type.Missing;
                    IPoint newPoint = m_hookHelper.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
                    IPointCollection pPointCollection = new PolylineClass();
                    pPointCollection.AddPoint(centerPoint, ref missing, ref missing);
                    pPointCollection.AddPoint(m_point, ref missing, ref missing);
                    double oldAngle = GetAngle(pPointCollection as IPolyline);

                    IPointCollection pointCollection = new PolylineClass();
                    pointCollection.AddPoint(centerPoint, ref missing, ref missing);
                    pointCollection.AddPoint(newPoint, ref missing, ref missing);
                    double newAngle = GetAngle(pointCollection as IPolyline);

                    ITransform2D pTransform2D = m_element as ITransform2D;
                    pTransform2D.Rotate(centerPoint, (newAngle - oldAngle));
                   
                    m_point = newPoint;
                   
                    IFeature fea = m_FeaCla.GetFeature(n_FeaID);
                    fea.Shape = m_element.Geometry;
                    fea.Store();
                   
                    pWorkspaceEdit.DisableUndoRedo();
                    pWorkspaceEdit.StopEditOperation();
                    pWorkspaceEdit.StopEditing(true);

                    m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, fea, fea.Shape as IEnvelope);
                    m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphicSelection, fea, fea.Shape as IEnvelope);
                
            }
        }

        public override void OnMouseUp(int Button, int Shift, int X, int Y)
        {
            if (base.m_enabled == false)
            {
                return;
            }
            if (Button == 1)
            {
                m_hookHelper.ActiveView.Refresh();
                m_moving = false;
                m_element = null;
                m_point = null;  
            }
        }

        #endregion

        #region 方法函数

        /// <summary>
        /// 获取线的角度（弧度）
        /// </summary>
        /// <param name="pPolyline">线</param>
        /// <returns></returns>
        private static double GetAngle(IPolyline pPolyline)
        {
            ILine pTangentLine = new Line();
            pPolyline.QueryTangent(esriSegmentExtension.esriNoExtension, 0.005, true, pPolyline.Length, pTangentLine);
            Double radian = pTangentLine.Angle;

            /*
            Double angle = radian * 180 / Math.PI;
            // 如果要设置正角度执行以下方法
            while (angle < 0)
            {
                angle = angle + 360;
            }
            // 返回角度
            return angle;
            */

            // 返回弧度
            return radian;
        }

        #endregion
    }

}

//向下面这样就可以把旋转几何的方法添加到 axToolbarControl1工具里面
BTGraphicsRotateElement br = new BTGraphicsRotateElement();
            ITool tool = br as ITool;
            this.axToolbarControl1.AddItem(tool, -1, -1, false, 3, esriCommandStyles.esriCommandStyleIconOnly);