Sign document with Image signature - advanced
GroupDocs.Signature provides ImageSignOptions class to specify different options for Image signature as follow
- signature alignment (HorizontalAlignment, VerticalAlignment)
- margins (Margin)
- additional extensions and appearances (Extensions, Appearance)
Here are the steps to add Image signature into document with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path as a constructor parameter.
- Instantiate the ImageSignOptions object according to your requirements and specify image signature options.
- Call Sign method of Signature class instance and pass ImageSignOptions to it.
- Analyze SignResult result to check newly created signatures if needed.
This example shows how to specify different Image signature options. See SignResult
using (Signature signature = new Signature("sample.xlsx"))
{
ImageSignOptions options = new ImageSignOptions("sample.jpg")
{
// set signature position
Left = 100,
Top = 100,
// set signature rectangle
Width = 100,
Height = 30,
// set signature alignment
// when VerticalAlignment is set the Top coordinate will be ignored.
// Use Margin properties Top, Bottom to provide vertical offset
VerticalAlignment = Domain.VerticalAlignment.Top,
// when HorizontalAlignment is set the Left coordinate will be ignored.
// Use Margin properties Left, Right to provide horizontal offset
HorizontalAlignment = Domain.HorizontalAlignment.Right,
Margin = new Padding() { Top = 20, Right = 20 },
// set rotation
RotationAngle = 45,
// setup image additional appearance as Brightness and Border
Appearance = new ImageAppearance()
{
Brightness = 0.9f,
Border = new Border()
{
Color = Color.DarkGreen,
DashStyle = DashStyle.DashLongDashDot,
Transparency = 0.5,
Visible = true,
Weight = 2
},
}
};
// sign document to file
SignResult signResult = signature.Sign("sgnedSample.xlsx", options);
Console.WriteLine("List of newly created signatures:");
int number = 1;
foreach (BaseSignature temp in signResult.Succeeded)
{
Console.WriteLine($"Signature #{number++}: Type: {temp.SignatureType} Id:{temp.SignatureId}, Location: {temp.Left}x{temp.Top}. Size: {temp.Width}x{temp.Height}");
}
}
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.