I have built a Blazor Map.
This is the code.
@page "/"
<div class="mapview">
<MapView Id="map" @ref="@map" MapUnit="@mapUnit" MapViewSizeUnitType="MapViewSizeUnitType.Percentage" Center="@centerPoint"
Zoom="@zoomInt" Width="100" Height="100" OnCurrentExtentChanged="@OnMapExtentChanged" OnMouseMove="@OnMouseMoveEvent">
<OverlaysSetting>
<LayerOverlay Id="vectorLayer" Layers="@vectorLayers"></LayerOverlay>
</OverlaysSetting>
<MapToolsSetting>
<MapTools>
<ZoomBarMapTool Location="ZoomBarLocation.UpperRight"></ZoomBarMapTool>
</MapTools>
</MapToolsSetting>
</MapView>
</div>
<div class="sidebar"></div>
@code{
private MapView? map;
private PointShape centerPoint = new PointShape(-8137421, 5133000);
private int zoomInt = 3;
private GeographyUnit mapUnit = GeographyUnit.Meter;
GeoCollection<Layer> vectorLayers = new GeoCollection<Layer>();
protected override void OnInitialized()
{
base.OnInitialized();
string ConectionStr = "Data Source=(localdb)\\MSSQLLocalDB;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False";
SqlServerFeatureLayer torringtonLayer = new SqlServerFeatureLayer(ConectionStr, "Vector_Worldcountries", "ID");
torringtonLayer.Name = "TorringtonVectorLayer";
torringtonLayer.FeatureSource.ProjectionConverter = new ProjectionConverter(Projection.GetWgs84ProjString(), Projection.GetSphericalMercatorProjString());
//torringtonLayer.FeatureSource.ProjectionConverter = new ProjectionConverter(2234, 3857);
torringtonLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = new AreaStyle(new GeoSolidBrush(GeoColor.FromArgb(50, GeoColors.Orange)));
//torringtonLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = new TextStyle("Portal_Name", new GeoFont("Arial", 14), new GeoSolidBrush(GeoColor.FromHtml("#21FF00")));
//torringtonLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle.YOffsetInPixel = 5;
torringtonLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.FillBrush = new GeoSolidBrush(GeoColor.FromArgb(50, GeoColors.Orange));
torringtonLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle.OutlinePen = new GeoPen(GeoColors.Red);
torringtonLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
vectorLayers.Add(torringtonLayer);
}
private void OnMapExtentChanged(CurrentExtentChangedMapViewEventArgs args)
{
}
private void OnMouseMoveEvent(MouseMovingMapViewEventArgs args)
{
}
}
But, In my browser doesn’t display.
The country layer that previously appeared on the map no longer suddenly doesn’t appear.
