如何从ESRI mobile 10.1.1中的MapLayer获取FeatureSource

在9.3代码中，您只需执行MapLayer.Layer即可获得FeatureLayer。 但在10.1.1中，他们将FeatureLayer更改为FeatureSource，并从MapLayer中删除了图层特性

这是别人写的我正在升级的旧代码：

static public MapLayer FindMapLayer(string sLayerName, Map theMap)
    {
        MapLayer lyr = null;
        try
        {
            lyr = theMap.MapLayers[sLayerName];
        }
        catch { }
        return lyr;
    }

static public FeatureLayer FindFeatureLayer(string sLayerName, Map theMap)
    {
        FeatureLayer featLyr = null;
        MapLayer lyr = FindMapLayer(sLayerName, theMap);
        if (lyr != null)
        {
            featLyr = lyr.Layer;
        }
        return featLyr;
    }

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我想出来了。您必须查看mobilecache.FeatureSources集合。该名称将与您在MXD中为图层命名的名称（目录中显示的确切字符串）相匹配，该图层在ArcGIS Server中作为服务发布

    public static FeatureSource FindFeatureLayer(string featureSourceName, Map theMap)
    {
        //TODO: this may not work if the feature source name doesn't match the map layer name!
        FeatureSource featSource = null;
        //10.1.1
        //Just grab the first map layer in order to get at the mobile cache and its
        // collection of feature sources.
        MobileCacheMapLayer cacheMapLayer = GetMobileCacheLayer(theMap);
        if (cacheMapLayer != null)
        {
            featSource = cacheMapLayer.MobileCache.FeatureSources[featureSourceName];
        }

        return featSource;
    }

    public static MobileCacheMapLayer GetMobileCacheLayer(Map theMap)
    {
        foreach (var layer in theMap.MapLayers)
        {
            if(layer is MobileCacheMapLayer)
                return (MobileCacheMapLayer)layer;
        }
        return null;
    }