单个要素闪烁很简单,关于多要素同时闪烁主要参考这两篇资源
Arcgis 要素闪烁
http://blog.csdn.net/chyocean/archive/2008/04/28/2337418.aspx
/// <summary> /// Defining a renderer for your layer /// </summary> /// <param name="pGeoFeatureLayer">图层</param> /// <param name="fieldName">sde数据库中字段名</param> /// <param name="pQueryFilter">过滤条件</param> private void DefineUniqueValueRenderer(IGeoFeatureLayer pGeoFeatureLayer, string fieldName, IQueryFilter pQueryFilter) { // IRandomColorRamp 对象 IRandomColorRamp pRandomColorRamp = new RandomColorRampClass(); //Make the color ramp for the symbols in the renderer. pRandomColorRamp.MinSaturation = 20; pRandomColorRamp.MaxSaturation = 40; pRandomColorRamp.MinValue = 85; pRandomColorRamp.MaxValue = 100; pRandomColorRamp.StartHue = 76; pRandomColorRamp.EndHue = 188; pRandomColorRamp.UseSeed = true; pRandomColorRamp.Seed = 43; //Make the renderer. IUniqueValueRenderer pUniqueValueRenderer = new UniqueValueRendererClass(); //填充样式 ISimpleFillSymbol pSimpleFillSymbol = new SimpleFillSymbolClass(); pSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid; pSimpleFillSymbol.Outline.Width = 0.4; //These properties should be set prior to adding values. pUniqueValueRenderer.FieldCount = 1; pUniqueValueRenderer.set_Field(0, fieldName); pUniqueValueRenderer.DefaultSymbol = pSimpleFillSymbol as ISymbol; pUniqueValueRenderer.UseDefaultSymbol = true; //显示表 IDisplayTable pDisplayTable = pGeoFeatureLayer as IDisplayTable; //IFeatureCursor 对象 IFeatureCursor pFeatureCursor = pDisplayTable.SearchDisplayTable(pQueryFilter, false) as IFeatureCursor; //IFeature对象 IFeature pFeature = pFeatureCursor.NextFeature(); //bool对象,pUniqueValueRenderer中是否找到字段值 bool ValFound; //字段索引号 int fieldIndex; //IFields对象 IFields pFields = pFeatureCursor.Fields; fieldIndex = pFields.FindField(fieldName); while (pFeature != null)//要素存在 { //填充样式 ISimpleFillSymbol pClassSymbol = new SimpleFillSymbolClass(); pClassSymbol.Style = esriSimpleFillStyle.esriSFSSolid; pClassSymbol.Outline.Width = 0.4; //字段值 string classValue; classValue = pFeature.get_Value(fieldIndex) as string; //Test to see if this value was added //to the renderer. If not, add it. ValFound = false; for (int i = 0; i <= pUniqueValueRenderer.ValueCount - 1; i++) { if (pUniqueValueRenderer.get_Value(i) == classValue) { ValFound = true; break; //Exit the loop if the value was found. } } //If the value was not found, it is new and it will be added. if (ValFound == false) { pUniqueValueRenderer.AddValue(classValue, fieldName, pClassSymbol as ISymbol); pUniqueValueRenderer.set_Label(classValue, classValue); pUniqueValueRenderer.set_Symbol(classValue, pClassSymbol as ISymbol); } pFeature = pFeatureCursor.NextFeature(); } //Since the number of unique values is known, //the color ramp can be sized and the colors assigned. pRandomColorRamp.Size = pUniqueValueRenderer.ValueCount; //ok bool bOK; pRandomColorRamp.CreateRamp(out bOK); //IEnumColors 对象, 颜色集合 IEnumColors pEnumColors = pRandomColorRamp.Colors; pEnumColors.Reset(); for (int j = 0; j <= pUniqueValueRenderer.ValueCount - 1; j++) { //value值 string xv; xv = pUniqueValueRenderer.get_Value(j); if (xv != "") { //填充样式 ISimpleFillSymbol pSimpleFillColor = pUniqueValueRenderer.get_Symbol(xv) as ISimpleFillSymbol; pSimpleFillColor.Color = pEnumColors.Next(); pUniqueValueRenderer.set_Symbol(xv, pSimpleFillColor as ISymbol); } } //'** If you didn't use a predefined color ramp //'** in a style, use "Custom" here. Otherwise, //'** use the name of the color ramp you selected. pUniqueValueRenderer.ColorScheme = "Custom"; //ITable对象 ITable pTable = pDisplayTable as ITable; //是否string bool isString = pTable.Fields.get_Field(fieldIndex).Type == esriFieldType.esriFieldTypeString; pUniqueValueRenderer.set_FieldType(0, isString); pGeoFeatureLayer.Renderer = pUniqueValueRenderer as IFeatureRenderer; }
关于查询后feature闪烁的问题
http://bbs.esrichina-bj.cn/ESRI/viewthread.php?tid=57376
[新提问] 关于查询后feature闪烁的问题
在实现属性到图的查询后,将查询结果闪烁显示,polygon内部并填充,下面贴出代码:
while (pFeature != null)
{
pMap.SelectFeature(pFeatureLayer, pFeature);
pFeature = pFeatureCursor.NextFeature();
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
pActiveView.ScreenDisplay.UpdateWindow();
if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline)
{
IGeometryCollection pGeometryCollection;
pGeometry = pFeature.Shape;
pGeometryCollection = new PolylineClass();
object Missing1 = Type.Missing;
object Missing2 = Type.Missing;
pGeometryCollection.AddGeometry(pGeometry, ref Missing1, ref Missing2);
pCartographicLineSymbol = new CartographicLineSymbol();
pSymbol = (ISymbol)pCartographicLineSymbol;
pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
pCartographicLineSymbol.Width = Size;
pCartographicLineSymbol.Color = pColor;
pMapControl.FlashShape((IGeometry)pGeometryCollection, 2, 150, pSymbol);
}
else if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
{
pGeometry = pFeature.Shape;
IGeometryCollection pGeometryCollection;
pGeometryCollection = new PolygonClass();
object Missing1 = Type.Missing;
object Missing2 = Type.Missing;
pGeometryCollection.AddGeometry(pGeometry, ref Missing1, ref Missing2);
pSimpleFillSymbol = new SimpleFillSymbol();
pSymbol = (ISymbol)pSimpleFillSymbol;
pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
pSimpleFillSymbol.Color = pColor;
pMapControl.FlashShape((IGeometry)pGeometryCollection, 2, 150, pSymbol);
}
else if (pFeature.Shape.GeometryType == esriGeometryType.esriGeometryPoint || pFeature.Shape.GeometryType == esriGeometryType.esriGeometryMultipoint)
{
pGeometry = pFeature.Shape;
IGeometryCollection pGeometryCollection;
pGeometryCollection = new MultipointClass();
pSimpleMarkersymbol = new SimpleMarkerSymbol();
object Missing1 = Type.Missing;
object Missing2 = Type.Missing;
pGeometryCollection.AddGeometry(pGeometry, ref Missing1, ref Missing2);
pSymbol = (ISymbol)pSimpleMarkersymbol;
pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
pSimpleMarkersymbol.Color = pColor;
pSimpleMarkersymbol.Size = 8;
pMapControl.FlashShape((IGeometry)pGeometryCollection, 2, 150, pSymbol);
}
红色代码处出现问题,提示说参数类型错误,各位高手和大侠们帮忙看看应该如何修改? 谢谢!!!!!!
3# JinDin 不是说对于多要素的闪烁要用到IGeometryCollection的么?
5#把要素存到IArray里.然后用IHookActions.DoActionOnMultiple 方法试试.
6#同意LS方法,将波涛的书里也是用该方法,可以闪烁多个要素
7#这个功能终于搞定了,线和面我的是 pGeometryCollection.AddGeometryCollection((IGeometryCollection)pGeometry);点用的是pGeometryCollection.AddGeometry(pGeometry, ref obj, ref obj),不知道为什么点线面不能用同样的方法添加要素?还有一个问题就是关于一直闪烁,FlashShape()中第二个闪烁次数的参数,似乎不敢设置太大,否则就会一直执行到闪烁完才可以执行后面的代码,是不是用Timer可以解决这个问题呢?试试先
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