Sign documents with additional image adjustments Leave feedback
GroupDocs.Signature contains ImageAppearance class that implements extra image adjustment setting like
- gray-scale (Grayscale)
- brightness (Brightness)
- contrast (Contrast)
- gamma correction (GammaCorrection)
- border (Border)
Base signature class SignOptions property Appearance should be set with instance of ImageAppearance class to provide additional image adjustment
Here are the steps to setup extra image appearance with GroupDocs.Signature:
- Create new instance of Signature class and pass source document path as a constructor parameter.
- Compose object ofImageAppearance object with all required additional options.
- Set SignOptions.Appearance property with ImageAppearance object.
- Call Sign method of Signature class instance and pass SignOptions to it.
- Analyze SignResult result to check newly created signatures if needed.
This example shows how to specify extra image appearances. See SignResult
using (Signature signature = new Signature("sample.pdf"))
{
ImageSignOptions options = new ImageSignOptions("sample.jpg")
{
// set signature position
Left = 100,
Top = 100,
// set signature rectangle
Width = 100,
Height = 30,
// set signature alignment
VerticalAlignment = Domain.VerticalAlignment.Bottom,
HorizontalAlignment = Domain.HorizontalAlignment.Right,
Margin = new Padding() { Bottom = 20, Right = 20 },
// setup image additional appearance as Brightness and Border
Appearance = new ImageAppearance()
{
Grayscale = true,
Contrast = 0.2f,
GammaCorrection = 0.3f,
Brightness = 0.9f,
Border = new Border()
{
Color = Color.DarkGreen,
DashStyle = DashStyle.DashLongDashDot,
Transparency = 0.5,
Visible = true,
Weight = 2
}
}
};
// sign document to file
signature.Sign("signed.pdf", options);
}
This example shows how to add Text signature to Pdf document with sticker look. See SignResult
using (Signature signature = new Signature("sample.docx"))
{
TextSignOptions options = new TextSignOptions("John Smith")
{
// set signature position
Left = 100,
Top = 100,
// set signature rectangle
Width = 100,
Height = 30,
// setup proper signature implementation
SignatureImplementation = TextSignatureImplementation.Sticker,
Appearance = new PdfTextStickerAppearance()
{
// select sticker icon
Icon = PdfTextStickerIcon.Star,
// setup if popup annotation will be opened by default
Opened = false,
// text content of an annotation
Contents = "Sample",
Subject = "Sample subject",
Title = "Sample Title"
},
// set signature alignment
VerticalAlignment = Domain.VerticalAlignment.Bottom,
HorizontalAlignment = Domain.HorizontalAlignment.Right,
Margin = new Padding() { Bottom = 20, Right = 20 },
// set text color and Font
ForeColor = Color.Red,
Font = new SignatureFont { Size = 12, FamilyName = "Comic Sans MS" },
};
// sign document to file
signature.Sign("signed.docx", options);
}
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 generate image signatures and/or sign your files with them for free, you can use the Generate Image online app.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the other online apps from the GroupDocs.Signature App Product Family.
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