private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
switch (toolAction)
{
case "Drag Zoom In": //判定当前的操作是否为拉框放大
IEnvelope pEnvelope = axMapControl1.TrackRectangle(); // 调用axMapControl1的矩形框跟踪功能进行拉框操作，
//将拉框完成后的范围赋值给一个Envelope对象
//此处，你可以尝试axMapControl1.TrackPolygon()，axMapControl1.TrackCircle()，axMapControl1.TrackLine()等方法的调用，看有什么效果
if (pEnvelope == null || pEnvelope.IsEmpty || pEnvelope.Height == 0 || pEnvelope.Width == 0) //判定所获取的拉框范围是否无效
{
return; // 拉框范围无效，就直接返回
}
axMapControl1.Extent = pEnvelope; // 给地图窗口的空间范围赋值为刚才拉框的范围
axMapControl1.ActiveView.Refresh(); //地图刷新
return;
case "Drag Zoom Out": //判定当前的操作是否为拉框缩小
IEnvelope pEnvelope1 = axMapControl1.TrackRectangle(); // 调用axMapControl1的矩形框跟踪功能进行拉框操作，
//将拉框完成后的范围赋值给一个Envelope对象
//此处，你可以尝试axMapControl1.TrackPolygon()，axMapControl1.TrackCircle()，axMapControl1.TrackLine()等方法的调用，看有什么效果
if (pEnvelope1 == null || pEnvelope1.IsEmpty || pEnvelope1.Height == 0 || pEnvelope1.Width == 0) ////判定所获取的拉框范围是否无效
{
return; //// 拉框范围无效，就直接返回
}
IActiveView pActiveView = axMapControl1.ActiveView; // 获取地图视窗对象
double mHeight = pActiveView.Extent.Height * pActiveView.Extent.Height / pEnvelope1.Height; // 根据倍数计算新空间范围高度
double mWidth = pActiveView.Extent.Width * pActiveView.Extent.Width / pEnvelope1.Width; // 根据倍数计算新空间范围宽度
double mMinX = pActiveView.Extent.XMin - (pEnvelope1.XMin - pActiveView.Extent.XMin) * pActiveView.Extent.Width / pEnvelope1.Width; //计算新空间范围的x的最小值
double mMinY = pActiveView.Extent.YMin - (pEnvelope1.YMin - pActiveView.Extent.YMin) * pActiveView.Extent.Height / pEnvelope1.Height; //计算新空间范围的y的最小值
double mMaxX = mMinX + mWidth; //计算新空间范围的x的最大值
double mMaxY = mMinY + mHeight; // 计算新空间范围的y的最大值
pEnvelope1.PutCoords(mMinX, mMinY, mMaxX, mMaxY); // 给Envelope对象赋值新的空间范围
//(pActiveView.Extent.XMax-pActiveView.Extent.XMin)*
axMapControl1.Extent = pEnvelope1; // 给地图范围赋值为新的空间范围
axMapControl1.ActiveView.Refresh(); //地图刷新
return;
case "Pan": // 判定是否进行地图平移操作
axMapControl1.Pan(); //可执行地图平移
return;
case "Select Feature Using Point": //点选要素
axMapControl1.ActiveView.FocusMap.ClearSelection(); // 清空当前地图的选择集;
axMapControl1.ActiveView.Refresh();
tagRECT r; // 定义一个tagRECT结构变量，用于存放以当前鼠标为中心的长宽各为10个像素的小矩形
r.left = e.x - 5; //
r.right = e.x + 5; //
r.bottom = e.y - 5; //
r.top = e.y + 5; //
IEnvelope pEnv = new Envelope() as IEnvelope; // 创建一个Envelope对象，用于接受刚才创建的小矩形范围由屏幕坐标转换为地图坐标的值
axMapControl1.ActiveView.ScreenDisplay.DisplayTransformation.TransformRect(pEnv, ref r, 4); //把r的屏幕坐标转换为地图坐标，存入Envelope对象中
pEnv.SpatialReference = axMapControl1.ActiveView.FocusMap.SpatialReference; //设定Envelope对象的空间坐标参考与当前地图窗口的坐标一致
IGeometry pGeo = pEnv as IGeometry; //接口访问到IGeometry接口
axMapControl1.Map.SelectByShape(pGeo, null, false); //调用地图控件中map对象的SelectByShape方法，在地图中选择与pGeo相交或包含在其中的地图要素
//int selCount = axMapControl1.Map.SelectionCount;
//IEnumFeature pEnumFeature = axMapControl1.Map.FeatureSelection as IEnumFeature;
//IFeature pFeature = pEnumFeature.Next();
//while (pFeature != null)
//{
// int index = pFeature.Fields.FindField("GB");
// str1 = Convert.ToString(pFeature.get_Value(index));
// MessageBox.Show(str1);
// //string str2 = pFeature.get_Value(2).ToString();
// pFeature = pEnumFeature.Next();
//}
ISelection selection = axMapControl1.Map.FeatureSelection;
IEnumFeatureSetup iEnumFeatureSetup = (IEnumFeatureSetup)selection;
iEnumFeatureSetup.AllFields = true;
IEnumFeature pEnumFeature = (IEnumFeature)iEnumFeatureSetup;
pEnumFeature.Reset();
IFeature pFeature = pEnumFeature.Next();
if (pFeature != null)
{
int index = pFeature.Fields.FindField("RNAME");
//string str1 = pFeature.OID.ToString();
if (index != -1)
{
str1 = pFeature.get_Value(index).ToString();
}
//MessageBox.Show(str1);
//pFeature = pEnumFeature.Next();
}
axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null); //
toolAction = "";
return;
case "Select Feature Using Rectangle": //矩形选择要素
IEnvelope pEnvlope2 = axMapControl1.TrackRectangle(); // 进行矩形框的绘制追踪，
if (pEnvlope2.IsEmpty == true) // 若矩形框为空
{
tagRECT r1;
r1.left = e.x - 5;
r1.right = e.x + 5;
r1.bottom = e.y - 5;
r1.top = e.y + 5;
axMapControl1.ActiveView.ScreenDisplay.DisplayTransformation.TransformRect(pEnvlope2, ref r1, 4);
pEnvlope2.SpatialReference = axMapControl1.ActiveView.FocusMap.SpatialReference;
}
IGeometry pGeo1 = pEnvlope2 as IGeometry;
axMapControl1.Map.SelectByShape(pGeo1, null, false);
axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
toolAction = "";
return;
case "Select Feature Using Circle": // 圆形选择要素
IGeometry pCircl = axMapControl1.TrackCircle(); //圆形绘制
if (pCircl.IsEmpty == true)
{
return;
}
// IGeometry pGeo1 = pEnvlope2 as IGeometry;
axMapControl1.Map.SelectByShape(pCircl, null, false);
axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
toolAction = "";
return;
case "Select Feature Using Polygon": //多边形选择要素
IGeometry pPolygon = axMapControl1.TrackPolygon(); // 绘制多边形
if (pPolygon.IsEmpty == true)
{
return;
}
// IGeometry pGeo1 = pEnvlope2 as IGeometry;
axMapControl1.Map.SelectByShape(pPolygon, null, false);
axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
toolAction = "";
return;
case "Select Feature Using Polyline": // 线性选择要素
IGeometry pLine = axMapControl1.TrackLine(); //绘制线
if (pLine.IsEmpty == true)
{
return;
}
// IGeometry pGeo1 = pEnvlope2 as IGeometry;
axMapControl1.Map.SelectByShape(pLine, null, false);
axMapControl1.Refresh(esriViewDrawPhase.esriViewGeoSelection, null, null);
toolAction = "";
return;
case "Draw Polygon":
IGeometry pPolygon1 = axMapControl1.TrackPolygon(); // 绘制多边形
if (pPolygon1 == null)
{
return;
}
IElement pElement = new PolygonElement();
pElement.Geometry = pPolygon1;
IFillShapeElement pPolygonEle = pElement as IFillShapeElement;
if (pSelectedFillSymbol != null)
{
pPolygonEle.Symbol = pSelectedFillSymbol;
}
IGraphicsContainer pGc = axMapControl1.ActiveView.GraphicsContainer;
pGc.AddElement(pElement, 0);
IGraphicsContainerSelect pGSelection = pGc as IGraphicsContainerSelect;
pGSelection.UnselectAllElements();
pGSelection.SelectElement(pElement);
toolAction = "";
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
return;
case "Draw Point":
IPoint pPointMark = new ESRI.ArcGIS.Geometry.Point(); // 创建一个点
pPointMark.PutCoords(e.mapX, e.mapY); //给点赋值为当前鼠标所在位置的地图坐标
IGeometry pPointGeo = pPointMark as IGeometry;
IElement pMElement = new MarkerElement();
pMElement.Geometry = pPointGeo;
IMarkerElement pMarkElement = pMElement as IMarkerElement;
if (pSelectedMarkSymbol != null)
{
pMarkElement.Symbol = pSelectedMarkSymbol;
}
IGraphicsContainer pGraphiscont = axMapControl1.ActiveView.GraphicsContainer;
pGraphiscont.AddElement(pMElement, 0);
IGraphicsContainerSelect pGS = pGraphiscont as IGraphicsContainerSelect;
pGS.UnselectAllElements();
pGS.SelectElement(pMElement);
toolAction = "";
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
return;
case "Draw Line":
IGeometry pLineGeo = axMapControl1.TrackLine(); // 绘制Line
if (pLineGeo == null)
{
return;
}
IElement pElement4 = new LineElement();
ILineElement pLineEle = pElement4 as ILineElement;
if (pSelectedLineSymbol != null)
{
pLineEle.Symbol = pSelectedLineSymbol;
}
pElement4.Geometry = pLineGeo;
IGraphicsContainer pGc4 = axMapControl1.ActiveView.GraphicsContainer;
pGc4.AddElement(pElement4, 0);
IGraphicsContainerSelect pGSelection4 = pGc4 as IGraphicsContainerSelect;
pGSelection4.UnselectAllElements();
pGSelection4.SelectElement(pElement4);
toolAction = "";
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
return;
case "Draw Text":
IRgbColor pColor = new RgbColor();
pColor.Red = 150;
pColor.Green = 150;
pColor.Blue = 0;
ITextSymbol pTextSymbol = new TextSymbol();
stdole.StdFont font = new stdole.StdFont();
font.Name = "宋体";
font.Size = 20;
pTextSymbol.Font = font as stdole.IFontDisp;
pTextSymbol.Color = pColor;
pTextSymbol.HorizontalAlignment = esriTextHorizontalAlignment.esriTHALeft;
pTextSymbol.VerticalAlignment = esriTextVerticalAlignment.esriTVABaseline;
pTextSymbol.Text = "This is my First Text";
IPoint pTextPoint = new ESRI.ArcGIS.Geometry.Point(); // 创建一个点
pTextPoint.PutCoords(e.mapX, e.mapY); //给点赋值为当前鼠标所在位置的地图坐标
IGeometry pTextGeo = pTextPoint as IGeometry;
IElement pTElement = new TextElement();
pTElement.Geometry = pTextGeo;
ITextElement pTextEle = pTElement as ITextElement;
pTextEle.Symbol = pTextSymbol;
pTextEle.Text = pTextSymbol.Text;
IGraphicsContainer pGraphisCon = axMapControl1.ActiveView.GraphicsContainer;
pGraphisCon.AddElement(pTElement, 0);
IGraphicsContainerSelect pGrhSelection = pGraphisCon as IGraphicsContainerSelect;
pGrhSelection.UnselectAllElements();
pGrhSelection.SelectElement(pTElement);
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
toolAction = "";
break;
case "Select Graphics by using Point": //通过点击获得GraphicsContainor中的element
IPoint pPoint = new ESRI.ArcGIS.Geometry.Point(); // 创建一个点
pPoint.PutCoords(e.mapX, e.mapY); //给点赋值为当前鼠标所在位置的地图坐标
double dist = axMapControl1.ActiveView.Extent.Width / 15; //设置以点为圆心的查询的半径
IGraphicsContainer pGc1 = axMapControl1.ActiveView.GraphicsContainer; //获得地图的GraphicsContainor容器
IEnumElement pEnumElement = pGc1.LocateElements(pPoint, dist); //以点为中心点，按照指定半径选择element
IGraphicsContainerSelect pGSelection1 = pGc1 as IGraphicsContainerSelect; //获得地图的容器中的图形要素选择集
if (pEnumElement != null) //
{
pEnumElement.Reset(); //回到-1位置
pGSelection1.UnselectAllElements(); //清空原来选择到的图形要素
pGSelection1.SelectElements(pEnumElement); //将新查询到的图形要素添加到GraphicsContainor容器中的图形要素选择集中
}
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); //图形要素刷新
return;
}
if (e.button == 2) //若单击鼠标右键
{
contextMenuStrip2.Show(axMapControl1, e.x, e.y); //在TOC控件的当前鼠标位置弹出右键菜单
}
}