ImageLayer Class

Displays map images obtained from map image data providers.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v24.2.dll

Declaration

C#

public class ImageLayer :
    LayerBase,
    IImageLayerRenderParametersProvider

VB.NET

Public Class ImageLayer
    Inherits LayerBase
    Implements IImageLayerRenderParametersProvider

Example

This example demonstrates how to monitor the service request state.

To do this, handle the ImageLayer.RequestDataLoading event. Specify the wait form which will be shown when data is loading. Handle the LayerBase.DataLoaded event to determine the state of the wait form after the map data is obtained.

Form1.cs

using DevExpress.XtraMap;
using System;
using System.Windows.Forms;


namespace RequestDataLoadingExample {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e) {
            ImageLayer layer = new ImageLayer();
            mapControl1.Layers.Add(layer);
            BingMapDataProvider provider = new BingMapDataProvider();
            provider.BingKey = "YOUR_BING_KEY";
            layer.DataProvider = provider;
            layer.RequestDataLoading += OnRequestDataLoading;
            layer.DataLoaded += OnDataLoaded;
        }
        void OnRequestDataLoading(object sender, EventArgs e) {
            Cursor.Current = Cursors.WaitCursor;
            if (!splashScreenManager1.IsSplashFormVisible)
                splashScreenManager1.ShowWaitForm();
        }
        void OnDataLoaded(object sender, DataLoadedEventArgs e) {
            Cursor.Current = Cursors.Default;
            splashScreenManager1.CloseWaitForm();
        }

    }
}

Form1.vb

Imports DevExpress.XtraMap
Imports System
Imports System.Windows.Forms


Namespace RequestDataLoadingExample
    Partial Public Class Form1
        Inherits Form

        Public Sub New()
            InitializeComponent()
        End Sub
        Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
            Dim layer As New ImageLayer()
            mapControl1.Layers.Add(layer)
            Dim provider As New BingMapDataProvider()
            provider.BingKey = "YOUR_BING_KEY"
            layer.DataProvider = provider
            AddHandler layer.RequestDataLoading, AddressOf OnRequestDataLoading
            AddHandler layer.DataLoaded, AddressOf OnDataLoaded
        End Sub
        Private Sub OnRequestDataLoading(ByVal sender As Object, ByVal e As EventArgs)
            Cursor.Current = Cursors.WaitCursor
            If Not splashScreenManager1.IsSplashFormVisible Then
                splashScreenManager1.ShowWaitForm()
            End If
        End Sub
        Private Sub OnDataLoaded(ByVal sender As Object, ByVal e As DataLoadedEventArgs)
            Cursor.Current = Cursors.Default
            splashScreenManager1.CloseWaitForm()
        End Sub

    End Class
End Namespace

Inheritance

Object

MapDisposableObject

LayerBase

ImageLayer

ImageTilesLayer