I have a page that sends html5 canvas data, encoded as a base64 bmp image (using this algorithm http://devpro.it/code/216.html) to a serverside process that converts it into a System.Drawing.Image object and does some operations on it.
In my local environment, this works just fine, but on my ec2 instance I get the following error:
System.ArgumentException: Parameter is not valid. at
System.Drawing.Image.FromStream(Stream stream, Boolean
useEmbeddedColorManagement, Boolean validateImageData) at
System.Drawing.Image.FromStream(Stream stream, Boolean
useEmbeddedColorManagement)
My code looks as follows:
System.Drawing.Image image = null;
string b64string = "...";
byte[] sf = Convert.FromBase64String(b64string );
using (MemoryStream s = new MemoryStream(sf, 0, sf.Length))
{
image = System.Drawing.Image.FromStream(s, false);
}
...
Here's a text file with a sample b64string that I'm using to test: https://docs.google.com/leaf?id=0BzVLGmig1YZ3MTM0ODBiNjItNzk4Yi00MzI5LWI5ZWMtMzU1OThlNWEyMTU5&hl=en_US
I've also tried the following and had the same results:
System.Drawing.ImageConverter converter = new System.Drawing.ImageConverter();
image = converter.ConvertFrom(sf) as System.Drawing.Image;
Any insight would be greatly appreciated!
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