C# Online Compiler | .NET Fiddle

<no name> by Anonymous

using System;
					
public class Program
{
	public static void Main()
	{
		var sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'/><img src='blehblehbleh'></img></body>");
		Console.WriteLine(sanitizedHtml);
		
		sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'></img><IMG src='blehblehbleh'/></body>");
		Console.WriteLine(sanitizedHtml);
		
		sanitizedHtml = RemoveImgTags("<body><IMG src='blehblehbleh'/></body>");
		Console.WriteLine(sanitizedHtml);
		
		sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'></img></body>");
		Console.WriteLine(sanitizedHtml);
		
		sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'></body>");
		Console.WriteLine(sanitizedHtml);
	}
	
	private static string RemoveImgTags(string html)
	{
		var start = -1;

		while ((start = html.IndexOf("<img", StringComparison.OrdinalIgnoreCase)) != -1)
		{
			var end1 = html.IndexOf("/>", start, StringComparison.OrdinalIgnoreCase);
			var end2 = html.IndexOf("/img>", start, (end1 == -1 ? html.Length : end1) - start, StringComparison.OrdinalIgnoreCase);

			if (end1 != -1) end1 += 2;
			if (end2 != -1) end2 += 5;
			
			var end = Math.Min(end1, end2);

			//One of the end tags was -1, i.e not found, so take the max instead (the one that was found)
			if (end == -1)
				end = Math.Max(end1, end2);

			if (end == -1)
				end = html.IndexOf(">", start) + 1;
			
			html = html.Remove(start, end - start);
		}

		return html;
	}
}

​x
 
using System;
                    
public class Program
{
    public static void Main()
    {
        var sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'/><img src='blehblehbleh'></img></body>");
        Console.WriteLine(sanitizedHtml);
        
        sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'></img><IMG src='blehblehbleh'/></body>");
        Console.WriteLine(sanitizedHtml);
        
        sanitizedHtml = RemoveImgTags("<body><IMG src='blehblehbleh'/></body>");
        Console.WriteLine(sanitizedHtml);
        
        sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'></img></body>");
        Console.WriteLine(sanitizedHtml);
        
        sanitizedHtml = RemoveImgTags("<body><img src='blahblahblah'></body>");
        Console.WriteLine(sanitizedHtml);
    }
    
    private static string RemoveImgTags(string html)
    {
        var start = -1;
​
        while ((start = html.IndexOf("<img", StringComparison.OrdinalIgnoreCase)) != -1)
        {
            var end1 = html.IndexOf("/>", start, StringComparison.OrdinalIgnoreCase);
            var end2 = html.IndexOf("/img>", start, (end1 == -1 ? html.Length : end1) - start, StringComparison.OrdinalIgnoreCase);
​
            if (end1 != -1) end1 += 2;
            if (end2 != -1) end2 += 5;
            
            var end = Math.Min(end1, end2);
​
            //One of the end tags was -1, i.e not found, so take the max instead (the one that was found)
            if (end == -1)
                end = Math.Max(end1, end2);
​
            if (end == -1)
                end = html.IndexOf(">", start) + 1;
            
            html = html.Remove(start, end - start);
        }
​
        return html;
    }
}

1
FizzBuzz

Cached Result
Last Run:	6:37:50 pm
Compile:	0.224s
Execute:	3.247s
Memory:	545.16kb
CPU:	0.234s

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