windowsforms-devexpress-dot-xtramap-dot-layerbase-51846129.md
Occurs when an internal exception is raised.
Namespace : DevExpress.XtraMap
Assembly : DevExpress.XtraMap.v25.2.dll
NuGet Package : DevExpress.Win.Map
public event MapErrorEventHandler Error
Public Event Error As MapErrorEventHandler
The Error event's data class is MapErrorEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Exception | Returns the raised exception. |
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.
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);
}
}
}
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
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the Error event.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
map-for-winforms-azure-routing/CS/Form1.cs#L45
routeInfoLayer.ItemStyle.Stroke = Color.DeepSkyBlue;
routeInfoLayer.Error += RouteInfoLayer_Error;
waypointsListBoxControl.DataSource = geoPoints;
map-for-winforms-azure-routing/VB/Form1.vb#L39
routeInfoLayer.ItemStyle.Stroke = Color.DeepSkyBlue
AddHandler routeInfoLayer.Error, AddressOf RouteInfoLayer_Error
waypointsListBoxControl.DataSource = geoPoints
See Also