AE指定字段转成注记

转自原文 ae指定字段转成注记

ArcMap中有一个功能是Label Features，就是可以将图层内指定字段值显示以Label形式显示在主窗口上，在Label Features后，用右键点击图层，发现可以出现一个原来灰色的功能名，ConvertLabelsToAnnotation。这个功能在AE中提供，可是自己找不到设定字段值的位置，无可奈何，只有另辟蹊径。

就是先创建一个注记层，然后按照图层里指定字段的值来生成注记。就是一个一个Feature点转换。可能会比AE提供的接口效率低，没有办法，自己不会用那个接口，也就只能这样勉强的用着了。这个方面最难点就是创建一个新的注记图层，有很多属性需要设置，比较麻烦，下面是代码

private void ConvertToAnnotationLayer(IMap pMap, ILayer pLayer, string fieldname, esriGeometryType type)

{

    IFeatureLayer pFeatLayer = pLayer as IFeatureLayer;

    int i = pFeatLayer.FeatureClass.FindField("SHAPE");

    IField pShapeField = pFeatLayer.FeatureClass.Fields.get_Field(i);

    IDataset pDataSet = pFeatLayer.FeatureClass as IDataset;

    IWorkspace pWS = pDataSet.Workspace;

    IFeatureWorkspace pFeatWS = pWS as IFeatureWorkspace;

    IGeoFeatureLayer pGeoFeatLayer = pFeatLayer as IGeoFeatureLayer;

    IFields pFields = pGeoFeatLayer.FeatureClass.Fields;

    IAnnotationLayerFactory pAnnoLayerFact = new FDOGraphicsLayerFactoryClass();

    IGraphicsLayerScale pGraphyScale = new GraphicsLayerScaleClass();

    pGraphyScale.ReferenceScale = ;

    pGraphyScale.Units = esriUnits.esriMeters;

    IAnnotationLayer pAnnoLayer = null;

    ISymbolCollection2 pSymColl = new SymbolCollectionClass();

    IFormattedTextSymbol pTextSymbol = new TextSymbolClass();

    IRgbColor pRGB = new RgbColorClass();

    pRGB.Red = ;

    pRGB.Blue = ;

    pRGB.Green = ;

    pTextSymbol.Color = pRGB;

      /*      pTextSymbol.Font=*/

    m_FontDisp.Size=;

    pTextSymbol.Font =m_FontDisp ;

    pTextSymbol.HorizontalAlignment = esriTextHorizontalAlignment.esriTHACenter;

    pTextSymbol.VerticalAlignment = esriTextVerticalAlignment.esriTVABaseline;

    pTextSymbol.CharacterSpacing = ;

    pTextSymbol.CharacterWidth = ;

    pTextSymbol.WordSpacing = ;

   //         IBoundsProperties pBoundProp = pTextSymbol as IBoundsProperties;

   /* pBoundProp.FixedSize = false;*/

  //          pBoundProp.FixedAspectRatio = true;

    ISymbol pSymbol = pTextSymbol as ISymbol;

    ISymbolIdentifier2 pSymident2;

    pSymColl.AddSymbol(pSymbol, fieldname, out pSymident2);

    ISymbolCollection pSymColl1= pSymColl as ISymbolCollection;

    IOverposterProperties pOverpost = new BasicOverposterPropertiesClass();

    IAnnotateLayerPropertiesCollection pAnnoPropColl = new AnnotateLayerPropertiesCollectionClass();

    IAnnotateLayerProperties pAnnoProp;

    ILabelEngineLayerProperties2 pLabelEngine=new LabelEngineLayerPropertiesClass();

    pLabelEngine.AnnotationClassID = ;

    pLabelEngine.Symbol = pTextSymbol;

    pLabelEngine.SymbolID = pSymident2.ID;

    pAnnoProp = pLabelEngine as IAnnotateLayerProperties;

    pAnnoProp.Class = pLayer.Name + fieldname;

    pAnnoProp.LabelWhichFeatures = esriLabelWhichFeatures.esriAllFeatures;

    pAnnoProp.Priority = ;

    IActiveView pActView=pMap as  IActiveView;

    pAnnoProp.GraphicsContainer = pActView.GraphicsContainer;

    pAnnoProp.FeatureLayer = pFeatLayer;

    pAnnoProp.FeatureLinked = true;

    pAnnoProp.AnnotationMaximumScale = ;

    pAnnoProp.AnnotationMinimumScale = 0.00000000001;

    pAnnoPropColl.Add(pAnnoProp);

    try

    {

       pAnnoLayer=pAnnoLayerFact.CreateAnnotationLayer(pFeatWS, pFeatLayer.FeatureClass.FeatureDataset, pLayer.Name + "_A_" + fieldname, pShapeField.GeometryDef,

         null, pAnnoPropColl,pGraphyScale,pSymColl1 , false, false, false, true, pOverpost, "");

    }

    catch (Exception s)

    {

        string mes = s.Message;

    }

    if (pAnnoLayer == null)

        return;

    int num=pFields.FindField(fieldname);

    ConvertToAnnotateByFeature(pLayer, num, ref pAnnoLayer);

    pMap.AddLayer(pAnnoLayer as ILayer);

}

   private bool ConvertToAnnotateByFeature(ILayer pLayer,int fieldnum,ref IAnnotationLayer pAnnoLayer)

{

    IFeatureLayer pFeatlayer = pLayer as IFeatureLayer;

    if (pFeatlayer == null)

        return false;

    IFeatureClass pFeatClass = pFeatlayer.FeatureClass;

    IFeatureCursor pFeatCursor = pFeatClass.Search(null, false);

    IFeature pFeat = pFeatCursor.NextFeature();

    IFeatureLayer pAnnoFeatLayer=pAnnoLayer as IFeatureLayer;

    IAnnotationClassExtension pAnnotateExten = pAnnoFeatLayer.FeatureClass.Extension as IAnnotationClassExtension;

    ISymbol pSymbol = pAnnotateExten.SymbolCollection.get_Symbol();

    IGeometry pGeo;

    double angle = ;

    IRgbColor pRGB=new RgbColorClass();

    pRGB.Blue=;

    pRGB.Green=;

    pRGB.Red=;

    /////判断是不是公路层的Width，特殊处理/////

    string temp_layername = pLayer.Name.ToUpper();

    bool bwidth=false;

    if(pFeatClass.Fields.get_Field(fieldnum).Name.ToUpper()=="WIDTH")

    {

        if (pLayer.Name.ToUpper().Contains("LRDL"))

            bwidth = true;

    }

    IElementCollection pElementColl = new ElementCollectionClass();

    pAnnoLayer.BeginAddElements();

    while(pFeat!=null)

    {

        pGeo = pFeat.Shape;

        IPoint pLabelPoint = null;

        if(pGeo is IPolyline)

        {

            IPolyline pline=pGeo as IPolyline;

            pLabelPoint = GetLabelPoint(pline);

        }

        if(pGeo is IPoint)

        {

            pLabelPoint = pGeo as IPoint;

        }

        if(pGeo is IPolygon)

        {

            IPolygon pPolygon = pGeo as IPolygon;

            IArea pArea = pPolygon as IArea;

            pLabelPoint = pArea.LabelPoint;

        }

        object val=pFeat.get_Value(fieldnum);

        string s=val.ToString();

        if (s == null || s.Length == )

        {

            pFeat = pFeatCursor.NextFeature();

            continue;

        }

        ///对公路的宽度进行特殊处理

        if(bwidth)

        {

            double width = double.Parse(s);

            int rtegnum = pFeatClass.FindField("RTEG");

            string rteg = pFeat.get_Value(rtegnum).ToString();

            if(rteg=="高速"&&width>55.0)

            {

                IElement pElement = MakeTextElement(pGeo, angle, s, pRGB, pSymbol);

                pElementColl.Add(pElement, pFeat.OID);

            }

            else if(width>40.0)

            {

                IElement pElement = MakeTextElement(pGeo, angle, s, pRGB, pSymbol);

                pElementColl.Add(pElement, pFeat.OID);

            }

        }

        else if (/*pLabelPoint != null&&*/s.Length>)

        {

            IElement pElement = MakeTextElement(pGeo, angle, s, pRGB,pSymbol);

            pElementColl.Add(pElement, pFeat.OID);

        }

        pFeat = pFeatCursor.NextFeature();

    }

    pAnnoLayer.EndAddElements();

    pAnnoLayer.BeginAddElements();

    if(pElementColl.Count<)

    {

        pAnnoLayer.EndAddElements();

        return true;

    }

    pAnnoLayer.DoAddElements(pElementColl, );

 /*   pAnnoLayer.SetupAttributeConversion()*/

    pAnnoLayer.EndAddElements();

    return true;

}