Question

I am not sure how to go about this. I have a dynamic comma delimited string:

A - B, Hello, C - D, World

I need to take that string and remove/filter out all instances of items that have a ” – ” in it. So the desired result would be a new string that would look like this:

Hello, World

Now if this cannot be done using string manipulation, the string comes from a

IEnumerable<string>

using linq. So maybe there is a way to get my desired result by using LINQ.

Here is the code:

var apps = lbAppGroup.Items.Cast<ListItem>().Where(i => i.Selected).Select(i => i.Value);
string selectedAppValues = String.Join(", ", apps.ToArray());

This returns my initial example.

I am using C# 3.5. Any direction or examples would be greatly appreciated!

Answer 1

Just do it with LINQ like you’re already doing:

var apps = lbAppGroup.Items.Cast<ListItem>().Where(i => i.Selected && !i.Value.Contains("-")).Select(i => i.Value);
string selectedAppValues = String.Join(", ", apps.ToArray());

Also, you could use a regular expression like this:

Regex re = new Regex("(?<=[,^]\s*)[^-]+(?=[,$])");

But you would only do that if you only had the string.