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Editorial Team
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Asked: 2026-05-23T14:41:47+00:00

I store emails and their attachments in a database. I’m using a WPF WebBrowser

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I store emails and their attachments in a database. I’m using a WPF WebBrowser and the NavigateToString method to display the html body of emails. It works but when emails use embedded images with a content id (cid), i can’t display them. I saved all embedded images as attachments when i save emails in database. I could create and store images in temporary files of the current user and replace cid references with an absolute path on user’s disk but i think it’s not the best way…

Have you got some ideas ?

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1 Answer

  1. Editorial Team

    I finally found a good way :

    I replaced the cid references of all images with base64 image data (RFC 2557) like this :

    <img src="data:image/png;base64,RAAAtuhhx4dbgYKAAA7...more data....." alt="test">

    You can use the following code to generate the base64 string :

    string base64Str = Convert.ToBase64String(File.ReadAllBytes(@"C:\Temp\test.png"));

    Remarks : doesn’t work with IE6

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