Adding an Image to Digital Signature Programatically

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Hi,

I need to digitally sign a document (Word/Excel) programatically using C#.
I found few posts on internet showing me how to just add a digital signature.

By default, i am using Microsoft Office Signing capabilities for this purpose.
Now, i want to embed an image to this Digital Signature Programatically and place it at the end of the file.

Can anyone help me?

Please note that if we try to add Digital Signature in Word/Excel file it asks us to select an image. I need to do that programatically

Thanks in Advance

Posted 5-Oct-11 8:47am

YKK Reddy

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Comments

BillWoodruff 5-Oct-11 17:43pm

Can you can use automation to get Excel and/or Word to perform this process via VSTO ?

HIRA_RANU 8-Nov-13 1:15am

how to add digital signature in word document and when i open it then i can find encrypted data

[no name] 6-Oct-11 0:24am

Hi,

Can you post a sample code ?

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

YKK Reddy · Accepted Answer · 2011-12-25T22:56:00

I googled it and asked many experts. They came out with different solutions which proved to be costly (performance was getting hampered).

So i have added image at the end of the word document using Interop assemblies and then applied Digital Signature (using open XML) approach.

Although word/Excel allows choosing an image while digitally signing, it is quite difficult to acheive this.

So, the functionality is broken into 2 parts.
1. Add Image file.
2. Add digital Signature

Adding an Image to Digital Signature Programatically

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Adding an Image to Digital Signature Programatically

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