ASPxDashboard.ConnectionError Event

Allows overriding the default behavior when current connection parameters do not allow connecting to a data store.

Namespace: DevExpress.DashboardWeb

Assembly: DevExpress.Dashboard.v18.2.Web.WebForms.dll

Declaration

C#

public event ConnectionErrorWebEventHandler ConnectionError

VB.NET

Public Event ConnectionError As ConnectionErrorWebEventHandler

Event Data

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

Property	Description
Cancel	Gets or sets whether the operation performed on the processed event should be canceled. Inherited from ConnectionErrorEventArgs.
ConnectionName	Gets the name of the connection for which the event has been raised. Inherited from ConfigureDataConnectionEventArgs.
ConnectionParameters	Gets or sets parameters used to establish a connection to data. Inherited from ConfigureDataConnectionEventArgs.
DashboardId	Gets the dashboard identifier.
DataSourceName	Gets the data source name.
Exception	Gets an exception that caused the ConnectionError event. Inherited from ConnectionErrorEventArgs.
Handled	Gets or sets whether default actions are required to connect to a data store. Inherited from ConnectionErrorEventArgs.

Remarks

The ConnectionError event is fired when current connection parameters do not allow connecting to a data store (for instance, the database is inaccessible). You can handle the ConnectionError event and override the default behavior in this case.

To override the default behavior, do the following:

• Check the data source name for which the event has been raised using the ConnectionErrorWebEventArgs.DataSourceName event parameter.
• Provide new connection parameters using the ConfigureDataConnectionEventArgs.ConnectionParameters property.
• Set the ConnectionErrorEventArgs.Handled property to true. This will cancel the default routine for providing connection parameters.

To cancel connecting to the data store, use the ConnectionErrorEventArgs.Cancel property.

To get the exception that caused the event, use the ConnectionErrorEventArgs.Exception property.