Append 'List' items to StringBuilder

问题

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?

回答1:

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).

回答2:

items.ForEach(item => sb.Append(item + ","));

回答3:

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

来源：https://stackoverflow.com/questions/4266795/append-list-items-to-stringbuilder