MapWebRequestEventHandler Delegate

A method that will handle the MapImageDataProviderBase.WebRequest event.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v20.1.dll

Declaration

public delegate void MapWebRequestEventHandler(
    object sender,
    MapWebRequestEventArgs e
);
Public Delegate Sub MapWebRequestEventHandler(
    sender As Object,
    e As MapWebRequestEventArgs
)

Parameters

Name Type Description
sender Object

The event source.

e MapWebRequestEventArgs

A MapWebRequestEventArgs object that contains event data.

Remarks

When creating a MapWebRequestEventHandler delegate, you identify the method that will handle the corresponding event. To associate an event with your event handler, add a delegate instance to this event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see Events and Delegates in MSDN.

Examples

This example shows how you can implement a custom proxy to make a request for map tiles from the Bing Maps web service.

To customize a web request, handle the MapImageDataProviderBase.WebRequest event. Then, use the web request arguments to specify your custom map request settings (e.g., custom MapWebRequestEventArgs.Credentials, MapWebRequestEventArgs.Headers for a proxy, etc.) to the Bing Maps data provider.

<Window 
    x:Class="WebRequest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxm="http://schemas.devexpress.com/winfx/2008/xaml/map"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxm:MapControl Name="mapControl1" >
            <dxm:ImageTilesLayer x:Name="imageTilesLayer">
                <dxm:ImageTilesLayer.DataProvider>
                    <dxm:BingMapDataProvider BingKey="INSERT_YOUR_BING_KEY_HERE"   
                                             WebRequest="BingMapDataProvider_WebRequest"/>
                </dxm:ImageTilesLayer.DataProvider>
            </dxm:ImageTilesLayer>
            <dxm:VectorLayer>
                <dxm:MapDot Location="54.196353,37.611622" Size="10"/>
            </dxm:VectorLayer>
        </dxm:MapControl>
    </Grid>
</Window>
See Also