private void OnDrawComplete(DrawEventArgs args)
{
if (DrawCompleted != null)
{
DrawCompleted(this, args);
}
}
public override void Tap(GestureEventArgs e)
{
Point2D point = _map.ScreenToMap(e.GetPosition(_map));
DrawEventArgs args = new DrawEventArgs
{
Geometry =new GeoPoint(point.X,point.Y)
};
OnDrawComplete(args);
base.Tap(e);
}
private async void drawCompleted(object sender, DrawEventArgs e)
{
QueryByDistanceParameters parm = new QueryByDistanceParameters
{
Geometry = e.Geometry,
Distance = 1,
ReturnContent = true,
IsNearest = true,
ReturnCustomResult = false,
QueryParameters = new QueryParameterSet
{
ExpectCount = 1,
QueryOption=QueryOption.ATTRIBUTEANDGEOMETRY,
QueryParams = new List<QueryParameter>()
{
new QueryParameter()
{
Name = "Countries@World",
}
}
}
};
try
{
QueryByDistanceService service = new QueryByDistanceService(url);
var result = await service.ProcessAsync(parm);
//无查询结果情况
if (result == null)
{
MessageBox.Show("查询结果为空");
return;
}
if (featuresLayer.Features.Count > 0)
{
featuresLayer.ClearFeatures();
}
foreach (Recordset recordset in result.Recordsets)
{
foreach (Feature f in recordset.Features)
{
featuresLayer.Features.Add(f);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
