AE指定字段转成注记

最新推荐文章于 2020-11-27 19:39:40 发布

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AE指定字段转成注记

08-06-13 08:33:33 作者:xbt746 出处：xbt746.cnblogs.com

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 = 200000;

pGraphyScale.Units = esriUnits.esriMeters;

IAnnotationLayer pAnnoLayer = null;

ISymbolCollection2 pSymColl = new SymbolCollectionClass();

IFormattedTextSymbol pTextSymbol = new TextSymbolClass();

IRgbColor pRGB = new RgbColorClass();

pRGB.Red = 0;

pRGB.Blue = 0;

pRGB.Green = 0;

pTextSymbol.Color = pRGB;

/* pTextSymbol.Font=*/

m_FontDisp.Size=8;

pTextSymbol.Font =m_FontDisp ;

pTextSymbol.HorizontalAlignment = esriTextHorizontalAlignment.esriTHACenter;

pTextSymbol.VerticalAlignment = esriTextVerticalAlignment.esriTVABaseline;

pTextSymbol.CharacterSpacing = 100;

pTextSymbol.CharacterWidth = 50;

pTextSymbol.WordSpacing = 100;

// 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 = 0;

pLabelEngine.Symbol = pTextSymbol;

pLabelEngine.SymbolID = pSymident2.ID;

pAnnoProp = pLabelEngine as IAnnotateLayerProperties;

pAnnoProp.Class = pLayer.Name + fieldname;

pAnnoProp.LabelWhichFeatures = esriLabelWhichFeatures.esriAllFeatures;

pAnnoProp.Priority = 0;

IActiveView pActView=pMap as IActiveView;

pAnnoProp.GraphicsContainer = pActView.GraphicsContainer;

pAnnoProp.FeatureLayer = pFeatLayer;

pAnnoProp.FeatureLinked = true;

pAnnoProp.AnnotationMaximumScale = 10000000000000000000;

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(0);
            IGeometry pGeo;
            double angle = 0;
            IRgbColor pRGB=new RgbColorClass();
            pRGB.Blue=255;
            pRGB.Green=255;
            pRGB.Red=0;
            /**//////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 == 0)
                ...{
                    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>0)
                ...{
                    IElement pElement = MakeTextElement(pGeo, angle, s, pRGB,pSymbol);
                    pElementColl.Add(pElement, pFeat.OID);
                }
                pFeat = pFeatCursor.NextFeature();
            }
            pAnnoLayer.EndAddElements();
            pAnnoLayer.BeginAddElements();
            if(pElementColl.Count<1)
            ...{
                pAnnoLayer.EndAddElements();
                return true;
            }
            pAnnoLayer.DoAddElements(pElementColl, 0);
         /**//*   pAnnoLayer.SetupAttributeConversion()*/
            pAnnoLayer.EndAddElements();
            return true;
        }