[c#] C# Syntax - Split String into Array by Comma, Convert To Generic List, and Reverse Order

What is the correct syntax for this:

IList<string> names = "Tom,Scott,Bob".Split(',').ToList<string>().Reverse();

What am I messing up? What does TSource mean?

List<string> names = "Tom,Scott,Bob".Split(',').Reverse().ToList();

This one works.

Try this:

List<string> names = new List<string>("Tom,Scott,Bob".Split(','));
names.Reverse();

If you are trying to

1. Use multiple delimiters
2. Filter any empty strings
3. Trim leading/trailing spaces

following should work:

string str = "Tom Cruise, Scott, ,Bob | at";
IEnumerable<string> names = str
                            .Split(new char[]{',', '|'})
                            .Where(x=>x!=null && x.Trim().Length > 0)
                            .Select(x=>x.Trim());

Output

• Tom
• Cruise
• Scott
• Bob
• at

Now you can obviously reverse the order as others suggested.

What your missing here is that .Reverse() is a void method. It's not possible to assign the result of .Reverse() to a variable. You can however alter the order to use Enumerable.Reverse() and get your result

var x = "Tom,Scott,Bob".Split(',').Reverse().ToList<string>()

The difference is that Enumerable.Reverse() returns an IEnumerable<T> instead of being void return

List<string> names = "Tom,Scott,Bob".Split(',').Reverse().ToList();

This one works.

Try this:

List<string> names = new List<string>("Tom,Scott,Bob".Split(','));
names.Reverse();

What your missing here is that .Reverse() is a void method. It's not possible to assign the result of .Reverse() to a variable. You can however alter the order to use Enumerable.Reverse() and get your result

var x = "Tom,Scott,Bob".Split(',').Reverse().ToList<string>()

The difference is that Enumerable.Reverse() returns an IEnumerable<T> instead of being void return

Try this:

List<string> names = new List<string>("Tom,Scott,Bob".Split(','));
names.Reverse();

List<string> names = "Tom,Scott,Bob".Split(',').Reverse().ToList();

This one works.

I realize that this question is quite old, but I had a similar problem, except my string had spaces included in it. For those that need to know how to separate a string with more than just commas:

string str = "Tom, Scott, Bob";
  IList<string> names = str.Split(new string[] {","," "},
  StringSplitOptions.RemoveEmptyEntries);

The StringSplitOptions removes the records that would only be a space char...

List<string> names = "Tom,Scott,Bob".Split(',').Reverse().ToList();

This one works.

Try this:

List<string> names = new List<string>("Tom,Scott,Bob".Split(','));
names.Reverse();

If you are trying to

1. Use multiple delimiters
2. Filter any empty strings
3. Trim leading/trailing spaces

following should work:

string str = "Tom Cruise, Scott, ,Bob | at";
IEnumerable<string> names = str
                            .Split(new char[]{',', '|'})
                            .Where(x=>x!=null && x.Trim().Length > 0)
                            .Select(x=>x.Trim());

Output

• Tom
• Cruise
• Scott
• Bob
• at

Now you can obviously reverse the order as others suggested.

What your missing here is that .Reverse() is a void method. It's not possible to assign the result of .Reverse() to a variable. You can however alter the order to use Enumerable.Reverse() and get your result

var x = "Tom,Scott,Bob".Split(',').Reverse().ToList<string>()

The difference is that Enumerable.Reverse() returns an IEnumerable<T> instead of being void return

I realize that this question is quite old, but I had a similar problem, except my string had spaces included in it. For those that need to know how to separate a string with more than just commas:

string str = "Tom, Scott, Bob";
  IList<string> names = str.Split(new string[] {","," "},
  StringSplitOptions.RemoveEmptyEntries);

The StringSplitOptions removes the records that would only be a space char...