5

I tried to append the items in a List<string> to a StringBuilder with LINQ:

items.Select(i => sb.Append(i + ","));

I found a similar question here which explains why the above doesn't work, but I couldn't find an Each of ForEach or anything similar on List which I could use instead.

Is there a neat way of doing this in a one-liner?

Peter Mortensen
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fearofawhackplanet
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3 Answers3

17
items.ForEach(item => sb.Append(item + ","));
miyamotogL
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  • Note that you have to hang on to a List not an IList where this extension is no longer available. That's why I prefer to write my own ForEach that works on IEnumerable. – Tigraine Nov 24 '10 at 12:38
8

You could use a simple foreach loop. That way you have statements which modify the StringBuilder, instead of using an expression with side-effects.

And perhaps your problem is better solved with String.Join(",", items).

CodesInChaos
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    I'd completely forgotten about `String.Join`. Sometimes I really need to break out of my Linq wankathon and remember how people programmed before :) – fearofawhackplanet Nov 24 '10 at 12:47
0

Try this:

 String [] items={"Jan","Feb","Mar"};
 StringBuilder sb=new StringBuilder();
 foreach(var entity in items)
 {
   sb.Append(entity + Environment.NewLine);
 }
 Textbox1.Text=sb.tostring();

Output:

Jan

Feb

Mar

Maghalakshmi Saravana
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