ArcGIS中对一组查询结果同时闪烁的实现
2010-01-04 22:22 flyingfish 阅读(1582) 评论(1) 收藏 举报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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