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POString Concatenation Vs String Builder Append
 

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    <p>So...I have this scenario where I have a Foreach loop that loops through a List of Checkboxes to check which are selected. For every selected checkbox, I have to do a pretty long string concatenation, involving 30 different strings of an average length of 20 characters, and then send it out as a HTTP request. 2 of the strings are dependant on the index/value of the checkbox selected.</p> <p>The length of the List of Checkboxes is also variable depending upon the user's data. I would say the average length of the List would be 20, but it can go up to 50-60. So the worst case scenario would be performing the whole string concatenation 60 or so times.</p> <p>For now I'm doing it with simple string concatenation via the '+' operator, but I'm wondering if it would be faster to do it with Stringbuilder. Of course, that means I'd have to either create a Stringbuilder object within the loop, or create it before the loop and call Stringbuilder.Remove at the end of it after sending out the HTTP request.</p> <p>I appreciate any insights anybody can share regarding this issue.</p> <p><strong>EDIT</strong><br> Thanks for all the replies everybody, so from what I've gathered, the best way for me to go about doing this would be something like:</p> <pre><code> StringBuilder sb = new StringBuilder(); foreach (CheckBox item in FriendCheckboxList) { if (item.Checked) { sb.Append(string1); sb.Append(string2); sb.Append(string3); . . . sb.Append(stringLast); SendRequest(sb.ToString()); sb.Length = 0; } } </code></pre>
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    1. COI apologize, it seems I do not understand Stringbuilder well enough. So calling Stringbuilder.ToString() clears the Stringbuilder?
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    2. CONo. Setting the Length property to zero clears it.
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    3. COsomeStringBuilder.length = 0;
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