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V24.1

AsyncDownloadPolicy.Probing Event

Allows you to spot the probing of external resources before an actual attempt to download data.

Namespace: DevExpress.Data

Assembly: DevExpress.Data.v24.1.dll

NuGet Package: DevExpress.Data

Declaration

public static event AsyncDownloadPolicy.WeakEventHandler<AsyncDownloadPolicy.ProbingEventArgs> Probing

Event Data

The Probing event's data class is AsyncDownloadPolicy.ProbingEventArgs. The following properties provide information specific to this event:

Property Description
Cancel Gets or sets a value indicating whether the event should be canceled. Inherited from CancelEventArgs.
IsTrustedUri Gets whether the processed resource is in a “safe” resource whitelist. Inherited from AsyncDownloadPolicy.AsyncDownloaderCancelEventArgs.
ThrowOnNonTrustedUri Gets or sets whether to throw an exception for unwanted download requests. Inherited from AsyncDownloadPolicy.AsyncDownloaderCancelEventArgs.
Uri Gets the processed resource identifier. Inherited from AsyncDownloadPolicy.AsyncDownloaderCancelEventArgs.

Remarks

void OnProbing(object sender, ProbingEventArgs e) {
    var shouldClose = XtraMessageBox.Show("Notification",
        "Probing the " + e.Uri.AbsoluteUri + " URL was detected. Close the connection?",
        MessageBoxButtons.YesNo);
    e.Cancel = (shouldClose == DialogResult.Yes) ? true : false;
}

Read the following topic for detailed information and examples: Suppress Control Requests to Download Data from External URLs.

See Also