Searching for document signatures with exception handling

GroupDocs.SignatureΒ providesΒ different error messages due to validation issues, missing required data, files etc. For handling these exceptions classΒ GroupDocsSignatureExceptionΒ should be used.

Here are the steps to handle exceptions from GroupDocs.Signature while searching for document signatures:

Exception handling while searching for document signatures

This example shows how to handle GroupDocs.Signature exceptions.

try
{
    // dont specify Password on protected document
    LoadOptions loadOptions = new LoadOptions();
    using (Signature signature = new Signature("samplePasswordProtected.pdf"))
    {
        DigitalSearchOptions options = new DigitalSearchOptions()
        {
        };
        // sign document to file
        List<DigitalSignature> signatures = signature.Search<DigitalSignature>(options);
    }
}
catch (GroupDocsSignatureException ex)
{
    Console.WriteLine("GroupDocs Signature Exception: " + ex.Message);
}
catch (Exception ex)
{
    Console.WriteLine("System Exception: " + ex.Message);
}

More resources

GitHub Examples

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

Free Online Apps

Along with the full-featured .NET library, we provide simple but powerful free online apps.

To sign PDF, Word, Excel, PowerPoint, and other documents you can use the online apps from the GroupDocs.Signature App Product Family.