RichEditControl.EncryptedFilePasswordCheckFailed Event

Occurs when the encryption password is empty or invalid.

Namespace: DevExpress.XtraRichEdit

Assembly: DevExpress.XtraRichEdit.v23.2.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.RichEdit, DevExpress.Win.TreeMap

Declaration

C#

public event EncryptedFilePasswordCheckFailedEventHandler EncryptedFilePasswordCheckFailed

VB.NET

Public Event EncryptedFilePasswordCheckFailed As EncryptedFilePasswordCheckFailedEventHandler

Event Data

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

Property	Description
DocumentName	Gets the encrypted document’s name.
Error	Obtains the error type caused the event to raise.
Handled	Gets or sets a value that indicates whether the event handler has completely handled the event or whether the system should continue its own processing. Inherited from HandledEventArgs.
TryAgain	Gets or sets whether to prompt with a password again.

Remarks

Hanlde the EncryptedFilePasswordCheckFailed event to determine the password error (PasswordRequired or RichEditDecryptionError.WrongPassword), and specify whether to enable a new password request (TryAgain).

If the TryAgain property is set to true, the RichEditControl.EncryptedFilePasswordRequested event occurs. The RichEditControl.InvalidFormatException event fires when the TryAgain property is not specifies or set to false.

View Example: Document Encryption (Simple Example)

C#

private void RichEditControl1_EncryptedFilePasswordRequested(object sender, EncryptedFilePasswordRequestedEventArgs e)
{
    //Count the number of attempts to enter the password
    if (tryCount > 0)
    {
        tryCount--;
    }
}

private void RichEditControl1_EncryptedFilePasswordCheckFailed(object sender, EncryptedFilePasswordCheckFailedEventArgs e)
{

    //Analyze the error that led to this event
    //Depending on the user input and number of attempts,
    //Prompt user to enter a password again
    //or create an empty file
    switch (e.Error)
    {
        case RichEditDecryptionError.PasswordRequired:
            if (tryCount > 0)
            {
                e.TryAgain = true;
                e.Handled = true;
                MessageBox.Show("You did not enter the password!", String.Format(" {0} attempts left", tryCount));
            }
            else
                e.TryAgain = false;

            break;

        case RichEditDecryptionError.WrongPassword:
            if (tryCount > 0)
            {
                if ((MessageBox.Show("The password is incorrect. Try Again?", String.Format(" {0} attempts left", tryCount),
                    MessageBoxButtons.YesNo)) == DialogResult.Yes)
                {
                    e.TryAgain = true;
                    e.Handled = true;
                }

            }
            break;
    }
}

VB.NET

Private Sub RichEditControl1_EncryptedFilePasswordRequested(ByVal sender As Object, ByVal e As EncryptedFilePasswordRequestedEventArgs) Handles richEditControl1.EncryptedFilePasswordRequested
    'Count the number of attempts to enter the password
    If tryCount > 0 Then
        tryCount -= 1
    End If
End Sub

Private Sub RichEditControl1_EncryptedFilePasswordCheckFailed(ByVal sender As Object, ByVal e As EncryptedFilePasswordCheckFailedEventArgs) Handles richEditControl1.EncryptedFilePasswordCheckFailed

    'Analyze the error that led to this event
    'Depending on the user input and number of attempts,
    'Prompt user to enter a password again
    'or create an empty file
    Select Case e.Error
        Case RichEditDecryptionError.PasswordRequired
            If tryCount > 0 Then
                e.TryAgain = True
                e.Handled = True
                MessageBox.Show("You did not enter the password!", String.Format(" {0} attempts left", tryCount))
            Else
                e.TryAgain = False
            End If


        Case RichEditDecryptionError.WrongPassword
            If tryCount > 0 Then
                If (MessageBox.Show("The password is incorrect. Try Again?", String.Format(" {0} attempts left", tryCount), MessageBoxButtons.YesNo)) = DialogResult.Yes Then
                    e.TryAgain = True
                    e.Handled = True
                End If

            End If
    End Select

End Sub