private void OnProcessCompleted(RouteEventArgs args)
{
if (ProcessCompleted != null)
{
Application.Current.RootVisual.Dispatcher.BeginInvoke(ProcessCompleted, new object[] { this, args });
}
}
private void request_Completed(object sender, RequestEventArgs e)
{
JsonObject jsonObject = (JsonObject)JsonObject.Parse(e.Result);
RouteResult result = RouteResult.FromJson(jsonObject);
LastResult = result;
RouteEventArgs args = new RouteEventArgs(result, e.Result, e.UserState);
OnProcessCompleted(args);
}
private void service_ProcessCompleted(object sender, RouteEventArgs e)
{
//预定义线样式
PredefinedLineStyle style = new PredefinedLineStyle { Stroke = new SolidColorBrush(Colors.Red), StrokeThickness = 3 };
//对结果进行判断，增强程序健壮性
if (e.Result == null)
{
MessageBox.Show("查询无结果");
return;
}
if (e.Result.NodePositions == null)
{
MessageBox.Show("查询无结果");
return;
}
if (e.Result.NodePositions.Count == 0)
{
MessageBox.Show("查询无结果");
return;
}
GeoLine line = new GeoLine();
line.Parts.Add(e.Result.NodePositions);
//将feature 添加到图层中
Feature feature = new Feature { Geometry = line, Style = style };
featuresLayer.AddFeature(feature);
}