LayerBase.Error Event

Occurs when an internal exception is raised.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v23.2.dll

NuGet Package: DevExpress.Win.Map

Declaration

C#

public event MapErrorEventHandler Error

VB.NET

Public Event Error As MapErrorEventHandler

Event Data

The Error event's data class is MapErrorEventArgs. The following properties provide information specific to this event:

Property	Description
Exception	Returns the raised exception.

Example

This example demonstrates how to monitor errors using the LayerBase.Error event handler. For example, this event is raised when an incorrect server URI is specified for a Web Map Service Provider.

Form1.cs

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

namespace MapErrorEvent {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e) {
            ImageLayer imageLayer = new ImageLayer();
            mapControl1.Layers.Add(imageLayer);
            WmsDataProvider provider = new WmsDataProvider();
            imageLayer.DataProvider = provider;
            provider.ServerUri = "http://YOUR_SERVER_URI";
            provider.ActiveLayerName = "ACTIVE_LAYER_NAME";
            imageLayer.Error += OnError;
        }
        private void OnError(object sender, MapErrorEventArgs e) {
            MessageBox.Show(e.Exception.Message);
        }
    }
}

Form1.vb

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

Namespace MapErrorEvent
    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 imageLayer As New ImageLayer()
            mapControl1.Layers.Add(imageLayer)
            Dim provider As New WmsDataProvider()
            imageLayer.DataProvider = provider
            provider.ServerUri = "http://YOUR_SERVER_URI"
            provider.ActiveLayerName = "ACTIVE_LAYER_NAME"
            AddHandler imageLayer.Error, AddressOf OnError
        End Sub
        Private Sub OnError(ByVal sender As Object, ByVal e As MapErrorEventArgs)
            MessageBox.Show(e.Exception.Message)
        End Sub
    End Class
End Namespace