MapErrorEventHandler Delegate
A method that will handle the LayerBase.Error event.
Namespace: DevExpress.XtraMap
Assembly: DevExpress.XtraMap.v18.2.dll
Declaration
public delegate void MapErrorEventHandler(
object sender,
MapErrorEventArgs e
);Public Delegate Sub MapErrorEventHandler(
sender As Object,
e As MapErrorEventArgs
)Parameters
| Name | Type | Description |
|---|---|---|
| sender | Object | The event source. This parameter identifies the LayerBase which raised the event. |
| e | MapErrorEventArgs | A MapErrorEventArgs object which contains event data. |
Remarks
When creating a MapErrorEventHandler 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 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.
NOTE
A complete sample project is available at https://github.com/DevExpress-Examples/how-to-monitor-errors-using-the-error-event-handler-t361988
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);
}
}
}