Handling incorrect document password exception

Signature class supports handling incorrect password passed to open protected documents over class IncorrectPasswordException.

Here are the steps to handle incorrect password exception when working with protected documents with GroupDocs.Signature:

Handling incorrect password exception

Following example demonstrates how to handle incorrect password exception.

// initialize LoadOptions with incorrect Password 
LoadOptions loadOptions = new LoadOptions() { Password = "1" };
using (Signature signature = new Signature("ProtectedPwd.pdf", loadOptions))
{
    try
    {
        QrCodeSignOptions options = new QrCodeSignOptions("JohnSmith")
        {
            EncodeType = QrCodeTypes.QR,
            Left = 100,
            Top = 100
        };
        // try to sign document to file, we expect for PasswordRequiredException
        signature.Sign(outputFilePath, options);
        Console.WriteLine("\nSource document signed successfully.\nFile saved at " + outputFilePath);
    }
    catch (IncorrectPasswordException ex)
    {
        Console.WriteLine($"HandlingIncorrectPasswordException: {ex.Message}");
    }
    catch (GroupDocsSignatureException ex)
    {
        Console.WriteLine($"Common GroupDocsSignatureException: {ex.Message}");
    }
    catch (Exception ex)
    {
        Console.WriteLine($"Common Exception happens only at user code level: {ex.Message}");
    }
    finally
    {
    }
}

More resources

GitHub Examples

You may easily run the code above and see the feature in action in our GitHub examples:

Free Online App 

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