Need some help on a problem please.
In fact I got a base64 string named "image" like that :
data:image/pjpeg;base64,iVBORw0KGgoAAAANSUhE...
I need to replace the part "data:image/pjpeg;base64," by "".
I try this way :
imageSrc = image.Replace("data:image/(png|jpg|gif|jpeg|pjpeg|x-png);base64,", "");
But it doesn't work.
Is somebody has an idea on that.
Thanks a lot
You should use the static Replace method on the Regex class.
imageSrc = Regex.Replace(image, "data:image/(png|jpg|gif|jpeg|pjpeg|x-png);base64,", "");
Well, for starters your code is doing String.Replace instead of Regex.Replace.
imageSrc = Regex.Replace(image, "data:image/(png|jpg|gif|jpeg|pjpeg|x-png);base64,", "");
But Regex is a rather heavy for this use case, why not just take everything after the comma?
imageSrc = image.SubString(image.IndexOf(",") + 1);
You are just using String.Replace, but you should use Regex.Replace for regular expressions.
But why not just use Substring?
imageSrc = image.Substring(image.IndexOf(',') + 1)
Since you know that your string is always starting with data:image/..., you don't need regular expressions at all.
Keep it simple and just take the substring after the first ,.
String.Replace() has no overload with regexp. Use Regex.Replace() instead.
There is a mistake in your regex, you must specify ?: for images alternatives and use Regex object, so :
Regex.Replace("data:image/(?:png|jpg|gif|jpeg|pjpeg|x-png);base64,", "");
it should work
?: is not required. That operator only tells the Regex engine not to create a backreference. Your solution works, and is more efficient, but it is not correct to say the original Regex has a mistake. I still maintain that Substring is the best solution here. :)