RichEditDocumentServer.EncryptedFilePasswordRequested Event

Raises when the RichEditDocumentImportOptions.EncryptionPassword property is not set or returns an invalid password.

Namespace: DevExpress.XtraRichEdit

Assembly: DevExpress.RichEdit.v23.1.Core.dll

NuGet Package: DevExpress.RichEdit.Core

Declaration

C#

public event EncryptedFilePasswordRequestedEventHandler EncryptedFilePasswordRequested

VB.NET

Public Event EncryptedFilePasswordRequested As EncryptedFilePasswordRequestedEventHandler

Event Data

The EncryptedFilePasswordRequested event's data class is EncryptedFilePasswordRequestedEventArgs. 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.
DocumentName	Gets the name of the encrypted document.
Password	Gets or sets the password used to encrypt the document.

Remarks

The EncryptedFilePasswordRequested event allows you to specify a password in code using the Password property. If the given password is empty or invalid, the RichEditDocumentServer.EncryptedFilePasswordCheckFailed event raises.

The code sample below shows how to handle the RichEditDocumentServer.EncryptedFilePasswordRequested and RichEditDocumentServer.EncryptedFilePasswordCheckFailed events to prompt users to enter a password. If the user cancels the operation or exceeds the number of attempts to enter the password, the RichEditDocumentServer loads an empty file.

View Example

C#

private static void Server_EncryptedFilePasswordRequested(object sender, EncryptedFilePasswordRequestedEventArgs e)
{
    //Prompt the user to enter the password
    Console.WriteLine("Enter password:");
    e.Password = Console.ReadLine();
    e.Handled = true;
}

private static void Server_EncryptedFilePasswordCheckFailed(object sender, EncryptedFilePasswordCheckFailedEventArgs e)
{
    //Analyze the password error:
    switch (e.Error)
    {
        //If the password is empty, raise the request again
        case RichEditDecryptionError.PasswordRequired:
            Console.WriteLine("You did not enter the password!");
            e.TryAgain = true;
            e.Handled = true;
        break;
        //If the password is invalid, ask user whether to continue the operation:
        case RichEditDecryptionError.WrongPassword:
            Console.WriteLine("The password is incorrect. Try Again? (yes/no)");
            string answer = Console.ReadLine()?.ToLower();
            if (answer == "y")
            {
                e.TryAgain = true;
                e.Handled = true;
            }
            //If user cancels the operation, open an empty file:
            else
            {
                Console.WriteLine("Password check failed. Loading an empty file...");
            }
        break;
    }
}

private static void Server_InvalidFormatException(object sender, RichEditInvalidFormatExceptionEventArgs e)
{
    RichEditDocumentServer server = (RichEditDocumentServer)sender;

    //Save and open the resulting file
    server.SaveDocument("EmptyFile.docx", DocumentFormat.OpenXml);
    Process.Start("EmptyFile.docx");
}

VB.NET

Private Shared Sub Server_EncryptedFilePasswordRequested(ByVal sender As Object, ByVal e As EncryptedFilePasswordRequestedEventArgs)
    'Prompt the user to enter the password
    Console.WriteLine("Enter password:")
    e.Password = Console.ReadLine()
    e.Handled = True
End Sub

Private Shared Sub Server_EncryptedFilePasswordCheckFailed(ByVal sender As Object, ByVal e As EncryptedFilePasswordCheckFailedEventArgs)

    'Analyze the password error:
    Select Case e.[Error]
        'If the password is empty, raise the request again
        Case RichEditDecryptionError.PasswordRequired
            Console.WriteLine("You did not enter the password!")
            e.TryAgain = True
            e.Handled = True
        'If the password is invalid, ask user whether to continue the operation:
        Case RichEditDecryptionError.WrongPassword
            Console.WriteLine("The password is incorrect. Try Again? (yes/no)")
            Dim answer As String = Console.ReadLine()?.ToLower()

            If answer = "y" Then
                e.TryAgain = True
                e.Handled = True
            'If user cancels the operation, open an empty file:
            Else
                Console.WriteLine("Password check failed. Loading an empty file...")
            End If
    End Select
End Sub

Private Shared Sub Server_InvalidFormatException(ByVal sender As Object, ByVal e As RichEditInvalidFormatExceptionEventArgs)
    'Save and open the resulting file
    Dim server As RichEditDocumentServer = CType(sender, RichEditDocumentServer)
    server.SaveDocument("EmptyFile.docx", DocumentFormat.OpenXml)
    Process.Start("EmptyFile.docx")
End Sub

Implements

EncryptedFilePasswordRequested