Regular expression to get html without comments

I need to carry out a task that is to get some html out from a webpage. Within the webpage there are commen开发者_运维百科ts and i need to get the html out from within the comments. I hope the example below can help. I need it to be done in c#.

<!--get html from here-->
<div><p>some text in a tag</p></div>
<!--get html from here-->

I want it to return

<div><p>some text in a tag</p></div>

How would I do this??

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What about finding the index of the first delimiter, the index of the second delimiter and "cropping" the string in between? Sounds way simpler, might be as much effective as.

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If all the instances are similarly formatted, an expression like this

<!--[^(-->)]*-->(.*)<!--[^(-->)]*-->

would retrieve everything between two comments. If your "get html from here" text in your comments is well defined, you could be more specific:

<!--get html from here-->(.*)<!--get html from here-->

When you run the RegEx over the string, the Groups collection would contain the HTML between the comments.

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Regexes are not ideal for HTML. If you really do want to process the HTML in all its glory, consider HtmlAgilityPack as discussed in this question. Looking for C# HTML parser

The Simplest Thing That Could Possibly Work is:

string pageBuffer=...;
string wrapping="<!--get html from here-->";
int firstHitIndex=pageBuffer.IndexOf(wrapping) + wrapping.Length;
return pageBuffer.Substring( firstHitIndex, pageBuffer.IndexOf( wrapping, firstHitIndex) - firstHitIndex));

(with error checking that both markers are present)

Depending on your context, WatiN might be useful (not if you're in a server, but if you're on the client side and doing something more interesting that could benefit from full HTML parsing.)

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I encountered with such a requirement to strip off HTML comments. I had been looking for some regular expression based solution so that it can work out of the box with free style commenting and having any type of characters under them.

I tried with it and it worked perfectly for single line, multi-line, comments with Unicode character and symbols.

<!--[\u0000-\u2C7F]*?-->