private async void UpdateIntersections()
{
try
{
Logging.LogMethodCall(ClassName);
var qf = new QueryParameters();
var gemStreet = GeometryEngine.Union(_selectedStreet.Value);
qf.Geometry = gemStreet;
qf.SpatialRelationship = SpatialRelationship.Touches;
var results = await FeatureSource.QueryFeaturesAsync(qf);
Intersections.Clear();
foreach (var result in results)
{
var streetName = result.Attributes[StreetNameField].ToString();
if (SelectedStreet.Key == streetName)
{
continue;
}
var loc = GeometryEngine.Intersections(result.Geometry, gemStreet);
if (loc[0] is MapPoint)
{
Intersections.Add(new Tuple <string, Geometry>(streetName, loc[0]));
}
else if (loc[0] is Multipoint)
{
Intersections.Add(new Tuple <String, Geometry>(streetName, ((Multipoint)loc[0]).Points[0]));
}
else if (loc[0] is Multipart)
{
var geom = ((Multipart)loc[0]).Parts[0].Points[0];
Intersections.Add(new Tuple <string, Geometry>(streetName, geom));
}
}
}
catch (Exception ex)
{
var message = "Error updating intersections";
ErrorHelper.OnError(MethodBase.GetCurrentMethod().DeclaringType.Name, message, ex);
Logging.LogMessage(Logging.LogType.Error, message, ex);
}
}
// myMapView 事件
private async void MyMapView_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
IInputElement ie = (IInputElement)(sender);
MapPoint loc = myMapView.ScreenToLocation(e.GetPosition(ie));
switch (operation)
{
case OperateType.DrawPoint: //画点
Graphic pt = new Graphic(loc, pointSymbol);
graphicsLayer.Graphics.Add(pt);
break;
case OperateType.DrawPolyline: //画线
pointCollection.Add(loc);
if (pointCollection.Count >= 2)
{
if (pointCollection.Count > 2)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolylineBuilder lb = new PolylineBuilder(pointCollection);
g.Geometry = lb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polyline l = new Esri.ArcGISRuntime.Geometry.Polyline(pointCollection);
Graphic lg = new Graphic(l, lineSymbol);
graphicsLayer.Graphics.Add(lg);
}
}
break;
case OperateType.DrawPolygon: //画多边形
pointCollection.Add(loc);
if (pointCollection.Count >= 3)
{
if (pointCollection.Count > 3)
{
Graphic g = graphicsLayer.Graphics[graphicsLayer.Graphics.Count - 1];
PolygonBuilder pb = new PolygonBuilder(pointCollection);
g.Geometry = pb.ToGeometry();
}
else
{
Esri.ArcGISRuntime.Geometry.Polygon p = new Esri.ArcGISRuntime.Geometry.Polygon(pointCollection);
Graphic pg = new Graphic(p, fillSymbol);
graphicsLayer.Graphics.Add(pg);
}
}
break;
case OperateType.None: //缺省状态
graphicsLayer.ClearSelection();
IdentifyGraphicsOverlayResult result = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
//选择图形元素
if (result.Graphics.Count < 1)
{
curSelGraphic = null;
EditVertexMenuItem.IsEnabled = false;
UneditVertexMenuItem.IsEnabled = false;
return;
}
curSelGraphic = result.Graphics.First();
curSelGraphic.IsSelected = true;
EditVertexMenuItem.IsEnabled = true;
break;
case OperateType.Cal_Clip: //选择图形
IdentifyGraphicsOverlayResult gResult = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult.Graphics.Count < 1)
{
return;
}
Graphic selGraphic = gResult.Graphics.First();
selGraphic.IsSelected = true; listOfClipGraphics.Add(selGraphic); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为2时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请选择两个多边形图形！");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Clip(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
graphicsLayer.Graphics.Remove(g2);
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic); operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Union: // 联合
IdentifyGraphicsOverlayResult gResultUnion = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResultUnion.Graphics.Count < 1)
{
return;
}
Graphic selGraphicUnion = gResultUnion.Graphics.First();
selGraphicUnion.IsSelected = true;
listOfClipGraphics.Add(selGraphicUnion); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为2时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polygon) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请选择两个多边形图形！");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Union(g1.Geometry, g2.Geometry.Extent); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
graphicsLayer.Graphics.Remove(g2);
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Cut: // 剪切
IdentifyGraphicsOverlayResult gResult_Cut = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Cut.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Cut = gResult_Cut.Graphics.First();
selGraphic_Cut.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Cut); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
if (g1.Geometry.GeometryType != GeometryType.Polygon || g2.Geometry.GeometryType != GeometryType.Polyline) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请先选择一个面要素后再选择一个线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Polyline polyLine = (Esri.ArcGISRuntime.Geometry.Polyline)g2.Geometry;
Esri.ArcGISRuntime.Geometry.Geometry[] resultGeometry = GeometryEngine.Cut(g1.Geometry, polyLine); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1);
for (int z = 0; z < resultGeometry.Length; z++)
{
Graphic clipedGraphic = new Graphic(resultGeometry[z], fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
}
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Simplify: // 拓扑纠正
IdentifyGraphicsOverlayResult gResult_Simplify = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Simplify.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Simplify = gResult_Simplify.Graphics.First();
selGraphic_Simplify.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Simplify); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
if (g1.Geometry.GeometryType == GeometryType.Point) //如果所选图形不是多边形，则退出
{
MessageBox.Show("请先选择一个面要素或线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Simplify(g1.Geometry); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Gene: // 简化
IdentifyGraphicsOverlayResult gResult_Gene = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Gene.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Gene = gResult_Gene.Graphics.First();
selGraphic_Gene.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Gene); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时
{
Graphic g1 = listOfClipGraphics[0];
if (g1.Geometry.GeometryType == GeometryType.Point) //如果所选图形是点，则退出
{
MessageBox.Show("请先选择一个面要素或线要素.");
listOfClipGraphics.Clear();
graphicsLayer.ClearSelection();
return;
}
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Generalize(g1.Geometry, 1000000.0, true); //执行剪切操作
if (resultGeometry != null) //处理结果
{
MessageBox.Show(resultGeometry.ToJson() + "\n" + resultGeometry.GeometryType);
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, fillSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Buff: // 缓冲
IdentifyGraphicsOverlayResult gResult_Buff = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Buff.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Buff = gResult_Buff.Graphics.First();
selGraphic_Buff.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Buff); //记录所选图形
if (listOfClipGraphics.Count == 1) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Esri.ArcGISRuntime.Geometry.Geometry resultGeometry = GeometryEngine.Buffer(g1.Geometry, 1000000.0); //执行剪切操作
if (resultGeometry != null) //处理结果
{
graphicsLayer.Graphics.Remove(g1); //从图形层中移除原图形
Graphic clipedGraphic = new Graphic(resultGeometry, new SimpleFillSymbol(SimpleFillSymbolStyle.Solid, Color.FromArgb(125, 255, 250, 0), new SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.FromArgb(0, 0, 0), 4.0))); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
case OperateType.Cal_Jiaodian: // 交点
IdentifyGraphicsOverlayResult gResult_Jiaodian = await myMapView.IdentifyGraphicsOverlayAsync(graphicsLayer, e.GetPosition(ie), 5, false);
if (gResult_Jiaodian.Graphics.Count < 1)
{
return;
}
Graphic selGraphic_Jiaodian = gResult_Jiaodian.Graphics.First();
selGraphic_Jiaodian.IsSelected = true;
listOfClipGraphics.Add(selGraphic_Jiaodian); //记录所选图形
if (listOfClipGraphics.Count == 2) //图形数目为1时，进行剪切计算
{
Graphic g1 = listOfClipGraphics[0];
Graphic g2 = listOfClipGraphics[1];
IReadOnlyList <Geometry> resultGeometry = GeometryEngine.Intersections(g1.Geometry, g2.Geometry); //执行剪切操作
if (resultGeometry != null) //处理结果
{
Graphic clipedGraphic = new Graphic(resultGeometry[0], pointSymbol); //利 用剪切结果构建新的图形
graphicsLayer.Graphics.Add(clipedGraphic);
operation = OperateType.None;
}
listOfClipGraphics.Clear(); //清空图形选择集合
graphicsLayer.ClearSelection(); //清空图形层所选
}
break;
}
}