c# AE实现栏选功能
2021-04-12 02:25
标签：高亮 菜单 width graphics tran ase inter sharp elements 1工具效果展示：画线，选择与该线相交的要素并高亮显示 2代码实现 开发环境： c# 2010、 arcengine 10.1、 win7 思路：在mapcontrol中画一条线（INewLineFeedback接口），并显示；用map的SelectByShape方法选择要素。 步骤： a 在项目中添加BaseTool类，命名T_Tool.cs b 在T_Tool中添加：INewLineFeedback m_displayFeedback = null 用于追踪鼠标所画的线段。 c 在OnMouseDown、OnMouseMove方法下面，实现画线操作 d 在OnDblClick()下结束画线，并显示要素。 代码：（OnMouseDown） 在OnMouseMove下： 在OnDblClick() e 工具的调用： 在系统菜单栏添加一个点击按钮，双击进入Click方法下，并用一下代码调用刚刚实现的工具。 c# AE实现栏选功能 标签：高亮 菜单 width graphics tran ase inter sharp elements 原文地址：https://www.cnblogs.com/zqctzk/p/9015709.html
pPoint = m_mapControl.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
if (m_displayFeedback == null)
{
m_displayFeedback = new NewLineFeedbackClass();
ISimpleLineSymbol pLine = m_displayFeedback.Symbol as ISimpleLineSymbol;
RgbColorClass pColor=new RgbColorClass();
pColor.Red=255;
pColor.Green=0;
pColor.Blue=0;
pLine.Color = pColor;
m_displayFeedback.Display = m_mapControl.ActiveView.ScreenDisplay;
m_displayFeedback.Start(pPoint);
}
else
{
m_displayFeedback.AddPoint(pPoint);
}
pPoint = m_mapControl.ActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);
m_displayFeedback.MoveTo(pPoint);
//双击的时候，结束画线
IPolyline pLine = m_displayFeedback.Stop();
//释放m_displayFeedback
m_displayFeedback = null;
//显示所画图形元素
DrawGeometry(pLine as IGeometry);
//选中高亮
ISelectionEnvironment pSelectionEnvironment = new SelectionEnvironmentClass();
m_mapControl.Map.SelectByShape(pLine as IGeometry, pSelectionEnvironment, false);
m_mapControl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
//空间查询
ISpatialFilter pSpatialFilter = new SpatialFilterClass();
pSpatialFilter.Geometry = pLine as IGeometry;
pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;
IFeatureLayer pFeatureLayer = m_mapControl.Map.get_Layer(0) as IFeatureLayer;
IFeatureCursor pfeatureCursor= pFeatureLayer.Search(pSpatialFilter, false);
IFeature pFeature = pfeatureCursor.NextFeature();
while (pFeature != null)
{
//code goes here
IFields pFields = pFeature.Fields;
IField pField = null;
for (int i = 0; i )
{
//此处可以获取要素类的字段名和每一个feature的字段值，还可以将数据存储在Datatable中，
//方便与其他对象（gridtable等）进行联动展示
pField= pFields.get_Field(i);
string filedName = pField.Name;
object fieldValue= pFeature.get_Value(i);
string field=fieldValue.ToString();
}
pFeature = pfeatureCursor.NextFeature();
}private void DrawGeometry(IGeometry geometry)
{
IGraphicsContainer pGraphicsContainer;
IActiveView pActiveView;
pGraphicsContainer = m_mapControl.ActiveView as IGraphicsContainer;
pActiveView = m_mapControl.ActiveView;
pGraphicsContainer.DeleteAllElements();
if (geometry == null)
return;
try
{
geometry.Project(m_mapControl.Map.SpatialReference);
IElement m_element = new LineElementClass();
m_element.Geometry = geometry;
IRgbColor pColor;
pColor = new RgbColorClass();
pColor.Red = 200;
pColor.Blue = 20;
pColor.Green = 0;
ILineSymbol pOutline;
pOutline = new SimpleLineSymbolClass();
pOutline.Width = 1.0;
pOutline.Color = pColor;
ISimpleLineSymbol pLineSymble = pOutline as ISimpleLineSymbol;
pLineSymble.Style = esriSimpleLineStyle.esriSLSDot;
ILineElement pFillshapeEle;
pFillshapeEle = m_element as ILineElement;
pFillshapeEle.Symbol = pOutline;
m_element = pFillshapeEle as IElement;
pGraphicsContainer.AddElement(m_element, 0);
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
catch (Exception err)
{
//
}
} T_Tool test = new T_Tool();
test.OnCreate(m_mapControl.Object);
m_mapControl.CurrentTool = test;