Asp.net WebApi 2.2&；返回坐标

首先，我正在ASP.NET网站中设置一个RadMap，以绑定到客户端数据源，如下所示：

        <telerik:RadClientDataSource runat="server" ID="RadClientDataSource1">
            <DataSource>
                <WebServiceDataSourceSettings>
                    <Select RequestType="GET" DataType="JSON" Url="http://localhost:4127/api/AvailableJobPins/17"></Select>
                </WebServiceDataSourceSettings>
            </DataSource>
        </telerik:RadClientDataSource>
        <telerik:RadMap runat="server" ID="JobMap" Zoom="12" CssClass="MyMap">
            <ClientEvents OnInitialize="OnInitialize" />
            <CenterSettings Latitude="30" Longitude="10" />
            <LayersCollection>
                <telerik:MapLayer Type="Tile" Subdomains="a,b,c"
                    UrlTemplate="http://#= subdomain #.tile.openstreetmap.org/#= zoom #/#= x #/#= y #.png"
                    Attribution="&copy; <a href='http://osm.org/copyright' title='OpenStreetMap contributors' target='_blank'>OpenStreetMap contributors</a>.">
                </telerik:MapLayer>
                <telerik:MapLayer Type="Marker" Shape="pinTarget" ClientDataSourceID="RadClientDataSource1" LocationField="location">
                    <TooltipSettings AutoHide="false" Template="#= marker.dataItem.PickupLocation # <br/> #=  location.lat #, #=  location.lng #"></TooltipSettings>
                </telerik:MapLayer>
            </LayersCollection>
            <ClientEvents OnLoad="map_load" />
        </telerik:RadMap>

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使用

列表

，而不是将它们串联起来，这样在转换为JSON时，它将是预期的格式。谢谢！工作完美。

    Function GetAvailableJobPins(ByVal id As Integer) As IHttpActionResult
        Dim pins = (From p In db.AvailableJobMapPins Select p).Where(Function(j) j.ChildCompanyID.Equals(id))
        If IsNothing(pins) Then
            Return NotFound()
        End If
        Return Ok(pins)
    End Function