Question

我的MVVM客户端应用程序出现了问题，从ESRI.ArcGISRuntime.Toolkit v10.2.7.0到ESRI ArcGISRuntime v100.1，我用来定位停靠点的符号没有被随机创建。我将List传递给以下方法：

 private async void SetMapSymbols()
    {
        var previousLayer = GraphicsLayer[SEARCH_LAYER];
        GraphicsLayer.Remove(previousLayer);

        var graphicsOverlay = new GraphicsOverlay() { Id = SEARCH_LAYER };
        var graphicList = new List<Graphic>();

        int order = 0;

        foreach (ObjectInfoModel entry in ObjectList)
        {
            order++;

            if (entry.SiteGeoLat == null || entry.SiteGeoLong == null) continue;

            var pointAttribList = ConvertObjectToDictionary(entry);
            DictionaryUtility.AddItemTodictionaryAttribute(pointAttribList, ORDER_ATTRIBUTE, order.ToString());
            var geo = entry.AltSiteGeoLat != null && entry.AltSiteGeoLong != null ? WebMercatorUtility.ConvertToMercator(entry.AltSiteGeoLong.Value, entry.AltSiteGeoLat.Value) : WebMercatorUtility.ConvertToMercator(entry.SiteGeoLong.Value, entry.SiteGeoLat.Value);
            var graphic = new Graphic(
                        new MapPoint(geo.Lon, geo.Lat, new SpatialReference(SPATIAL_REFERENCE)),
                        pointAttribList,
                     string.IsNullOrEmpty(entry.Area) ? await SymbolUtility.CreateSymbols(order.ToString(), SymbolTypes.Blue, SymbolShapes.Pin) :
                                                                await SymbolUtility.CreateSymbols(order.ToString(), SymbolTypes.Red, SymbolShapes.Arrow));
            if (entry.SiteGeoTypeCode != MAPPABLE)
            {
                graphic.Symbol = string.IsNullOrEmpty(entry.Area) ? await SymbolUtility.CreateSymbols(order.ToString(), SymbolTypes.Blue, SymbolShapes.Pin2) :
                                                                             await SymbolUtility.CreateSymbols(order.ToString(), SymbolTypes.Red, SymbolShapes.Arrow2);
            }

            graphicList.Add(graphic);

        }

        graphicList.ForEach(x => graphicsOverlay.Graphics.Add(x));
        GraphicsLayer.Add(graphicsOverlay);
    }

如您所见，它将等待SymbolUtility为列表中的每个项目创建一个符号。所以这是方法：

        public static async Task<Symbol> CreateSymbols(string text, SymbolTypes type, SymbolShapes shape)
    {
        var iconPath = string.Empty;
        iconPath = string.Format(@"pack://application:,,,/Images/{0}_{1}.png", type.ToString(), shape.ToString());

        var pc = new PictureMarkerSymbol(new Uri(iconPath, UriKind.RelativeOrAbsolute));
        pc.Width = 30;
        pc.Height = 30;

        var cm = new CompositeSymbol();
        var ts = new TextSymbol()
        {
            Color = Colors.Black,
            FontStyle = FontStyle.Normal,
            FontDecoration = FontDecoration.None,
            FontFamily = "Arial",
            FontWeight = FontWeight.Bold,
            Size = 14,
            VerticalAlignment = VerticalAlignment.Middle,
            HorizontalAlignment = HorizontalAlignment.Center,
            OffsetY = shape == SymbolShapes.Arrow ? 5 : 0
        };

        ts.Text = text;
        cm.Symbols.Add(pc);
        cm.Symbols.Add(ts);

        return await Task.Factory.StartNew<Symbol>(() => { return cm; });
    }

PNG文件与实用程序位于相同的解决方案中，但不在同一项目中。发生的问题是该符号不会随机渲染PNG部分，但将始终返回该符号的文本部分。

如果有人对此有任何想法，我将不胜感激。

Answer 1

如果在Image控件中使用了图标路径，您是否看到了图像？可能是图标路径不正确，或者需要更改生成操作或复制到输出目录（请参见：msdn doc）。如果图标路径正确，符号是否会在CompositeSymbol之外渲染（仅使用PictureMarkerSymbol）？如果是，是否可以通过将SDK更新到100.4或更新GraphicsRenderingMode或在放大/缩小地图时解决？

我无法使用以下代码重制，其中将note.png添加为内容，如果较新则复制。

MyMapView.Map = new Map(SpatialReferences.Wgs84);
var symbol = new CompositeSymbol();
symbol.Symbols.Add(new PictureMarkerSymbol(new Uri("pack://application:,,,/note.png")));
symbol.Symbols.Add(new TextSymbol("1", Color.Black, 10, Esri.ArcGISRuntime.Symbology.HorizontalAlignment.Center, Esri.ArcGISRuntime.Symbology.VerticalAlignment.Middle));
var overlay = new GraphicsOverlay();
overlay.Graphics.Add(new Graphic(new MapPoint(0, 0), symbol));
MyMapView.GraphicsOverlays.Add(overlay);

ArcGIS Runtime的资深开发人员也许可以在此forum中为您提供帮助。

在ESRI地图上创建符号的问题

1 个答案: