Verify for multiple signatures Leave feedback
GroupDocs.Signature supports verification of documents for different signature types. This approach requires to add all required verification options to list.
Here are the steps to verify document for multiple signatures with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path or stream as a constructor parameter.
- Instantiate required several VerifyOptions objects (BarcodeVerifyOptions, QrCodeVerifyOptions, DigitalVerifyOptions, TextVerifyOptions) and add instances to List<VerifyOptions> collection.
- Call Verify method of Signature class instance and pass filled list of List<VerifyOptions> to it.
This example shows how to search for different signature types in the document.
using (Signature signature = new Signature("sampleSigned.pdf"))
{
TextVerifyOptions textVerifyOptions = new TextVerifyOptions()
{
AllPages = true, // this value is set by default
SignatureImplementation = TextSignatureImplementation.Stamp,
Text = "John",
MatchType = TextMatchType.Contains
};
BarcodeVerifyOptions barcVerifyOptions = new BarcodeVerifyOptions()
{
AllPages = true, // this value is set by default
Text = "John",
MatchType = TextMatchType.Contains
};
QrCodeVerifyOptions qrcdVerifyOptions = new QrCodeVerifyOptions()
{
AllPages = true, // this value is set by default
Text = "John",
MatchType = TextMatchType.Contains
};
DigitalVerifyOptions digtVerifyOptions = new DigitalVerifyOptions("certificate.pdf")
{
Comments = "Test comment"
};
// verify document signatures
List<VerifyOptions> listOptions = new List<VerifyOptions>();
listOptions.Add(textVerifyOptions);
listOptions.Add(barcVerifyOptions);
listOptions.Add(qrcdVerifyOptions);
listOptions.Add(digtVerifyOptions);
VerificationResult result = signature.Verify(listOptions);
if (result.IsValid)
{
Console.WriteLine("\nDocument was verified successfully!");
}
else
{
Console.WriteLine("\nDocument failed verification process.");
}
}
To learn more about document eSign features, please refer to the advanced usage section.
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
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.
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