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replace <select>

Posted on 2012-03-29
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Last Modified: 2012-03-31
I have a string with <select></select> tag. I would like to replace all select tags (with everything in it) with  '______'.

For example "One and  <select><option value="Some text"</option></select> two and
<select><option value="Another text"</option></select>.

This should be come "One and _____ two and _____.
How can I do that?
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Question by:johnkainn
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4 Comments
 
LVL 23

Expert Comment

by:wdosanjos
ID: 37781805
Here is an option using Regular Expressions:
var rx = new Regex(@"<select>.*?(</select>)", RegexOptions.IgnoreCase | RegexOptions.Singleline);
var s = "One and  <select><option value=\"Some text\"</option></select> two and <select><option value=\"Another text\"</option></select>.";

var replaced = rx.Replace(s, "______");

Console.WriteLine(replaced);

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Output:
One and  ______ two and ______.

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I hope this helps.
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Author Comment

by:johnkainn
ID: 37783089
Thank you very much. I used line to simplify.
Actually I would like to replace with different word for each select tag.
I keep the words in an array and there are the same number of items in the array as there are select tags in the string. Do you know how to do this?
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LVL 23

Accepted Solution

by:
wdosanjos earned 2000 total points
ID: 37783275
Please try the following:
var rx = new Regex(@"<select>.*?(</select>)", RegexOptions.IgnoreCase | RegexOptions.Singleline);
var s = "One and <select><option value=\"Some text\"</option></select> two and <select><option value=\"Another text\"</option></select>.";
var r = new String[]{"*First*", "*Second*"};

var replaced = rx.Replace(s, new MatchReplacements(r).MatchEvaluator);

Console.WriteLine(replaced);

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MatchReplacements class:
public class MatchReplacements
{
	private String[] _replacements;
	private int _next;
	
	public MatchEvaluator MatchEvaluator { get; private set; }
	
	public MatchReplacements(String[] replacements)
	{
		_replacements = replacements;
		this.MatchEvaluator = new MatchEvaluator(ReplaceCC);
	}
		
	public string ReplaceCC(Match m)
	{
		return _replacements[_next++];
	}
}

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Output:
One and *First* two and *Second*.

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Author Closing Comment

by:johnkainn
ID: 37791946
Thank you very much.
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