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POWhat is the C# Regex equivalent to Java's appendReplacement and appendTail
 

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  1. POWhat is the C# Regex equivalent to Java's appendReplacement and appendTail
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    <p><strong>UPDATE</strong></p> <p>Here is what I came up with. I haven't tested it yet because it is part of a much larger piece of code that still needs to be ported.</p> <p>Can you see anything that looks out of place?</p> <pre><code>private const string tempUserBlock = "%%%COMPRESS~USER{0}~{1}%%%"; string html = "some html"; int p = 0; var userBlock = new ArrayList(); MatchCollection matcher = preservePatterns[p].Matches(html); int index = 0; StringBuilder sb = new StringBuilder(); int lastValue = 0; foreach(Match match in matcher){ string matchValue = match.Groups[0].Value; if(matchValue.Trim().Length &gt; 0) { userBlock.Add(matchValue); int curIndex = lastValue + match.Index; sb.Append(html.Substring(lastValue, curIndex)); sb.AppendFormat(tempUserBlock, p, index++); lastValue = curIndex + match.Length; } } sb.Append(html.Substring(lastValue)); html = sb.ToString(); </code></pre> <hr> <p><strong>ORIGINAL POST BELOW:</strong></p> <p>Here is the original Java:</p> <pre><code>private static final String tempUserBlock = "%%%COMPRESS~USER{0}~{1}%%%"; String html = "some html"; int p = 0; List&lt;String&gt; userBlock = new ArrayList&lt;String&gt;(); Matcher matcher = patternToMatch.matcher(html); int index = 0; StringBuffer sb = new StringBuffer(); while (matcher.find()) { if (matcher.group(0).trim().length() &gt; 0) { userBlock.add(matcher.group(0)); matcher.appendReplacement(sb, MessageFormat.format(tempUserBlock, p, index++)); } } matcher.appendTail(sb); html = sb.toString(); </code></pre> <p>And my C# conversion so far</p> <pre><code>private const string tempUserBlock = "%%%COMPRESS~USER{0}~{1}%%%"; string html = "some html"; int p = 0; var userBlock = new ArrayList(); MatchCollection matcher = preservePattern.Matches(html); int index = 0; StringBuilder sb = new StringBuilder(); for(var i = 0; i &lt; matcher.Count; ++i){ string match = matcher[i].Groups[0].Value; if(match.Trim().Length &gt; 0) { userBlock.Add(match); // WHAT DO I DO HERE? sb.Append( string.Format(tempUserBlock, p, index++) ); } } // WHAT DO I DO HERE? matcher.appendTail(sb); html = sb.toString(); </code></pre> <p><strong>See comment above, where I ask, "WHAT DO I DO HERE?"</strong></p> <p><em><strong>Clarification</em></strong><br> The Java code above is performing string replacement on some HTML. It saves the originally replaced text because it needs to be re-inserted later after some whitespace compression is completed.</p>
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    1. COSo what's the problem?
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    2. COCan you better define the issue, like, what is the expected result and what is the result you're getting?
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    3. COI'm guessing its the parts marked with `// WHAT DO I DO HERE?`
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