Searching for document signatures with exception handling

GroupDocs.Signature provides different error messages due to validation issues, missing required data, files etc. For handling these exceptions class GroupDocsSignatureException should be used.

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

• Compose try-catch block above Search  method with catching GroupDocsSignatureException type error.

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 our GitHub examples:

• GroupDocs.Signature for .NET examples, plugins, and showcase
• GroupDocs.Signature for Java examples, plugins, and showcase
• Document Signature for .NET MVC UI Example 
• Document Signature for .NET App WebForms UI Example
• Document Signature for Java App Dropwizard UI Example
• Document Signature for Java Spring UI Example

Free Online App 

Along with full-featured .NET library we provide simple, but powerful free Apps.
You are welcome to eSign PDF, Word, Excel, PowerPoint documents with free to use online GroupDocs Signature App.