Invalid URL converting byte array to base64

Question

Im using signaturepad from Nuget, everything is fine with the exception of trying to recreate signatures from the byte array stored on the server.

My Model has

public byte[] MySignature { get; set; }

and in my index view I have this to try and display the signature, but all I ever get is invalid urls

<td>
        @{
            if (item.MySignature != null)
            {
                <img src="@string.Format("data:image/jpeg;base64,{0}", Convert.ToBase64String(item.MySignature));" />
            }
        }
</td>

Am I missing something plainly obvious?

Not quite sure if it's your problem, but the semicolon ; is not necessary at the end. — juunas
– juunas, Commented Mar 2, 2017 at 21:13
You sir, are a legend. Originally I put it altogether in multiple lines and the ; was just left over from a copy paste. Worked like a charm. If you wanna add an answer I'll mark it. — Kevin Knapp
– Kevin Knapp, Commented Mar 2, 2017 at 22:11

juunas · Accepted Answer · 2017-03-02 22:14:11Z

1

Turns out my guess was right :)

The semicolon at the end of the src attribute value was superfluous:

<img src="@string.Format("data:image/jpeg;base64,{0}", Convert.ToBase64String(item.MySignature));" />

It must be:

<img src="@string.Format("data:image/jpeg;base64,{0}", Convert.ToBase64String(item.MySignature))" />

The reason is that the first one includes the semicolon in the base-64 string, which makes it invalid.

answered Mar 2, 2017 at 22:14

juunas

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