Object from comma separated string using linq [closed]

Question

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers.

---

This question does not appear to be about programming within the scope defined in the help center.

Closed 8 years ago.

Improve this question

Finally getting around to learning LINQ. I want to convert the strings to objects. I know there are other ways, but I want to see how it's done using LINQ. This is the best way I've come up with:

using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        string [] lines = new string[2];
        lines[0] = "John, 12345, true";
        lines[1] = "Miles, 45678, true";

        var o = from x in lines
                select new {
                    name = x.Split(',')[0],
                    zip  = Int32.Parse(x.Split(',')[1]),
                    status = bool.Parse(x.Split(',')[2])
                };
        foreach (var p in o) {
            Console.WriteLine(p.name + " - " + p.zip + ", - " + p.status);
        }
    }
}

My question is: Is there a better way without using all those Split()s? Here's a fiddle: http://dotnetfiddle.net/RSY48R.

Answer 1

using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        string [] lines = new string[2];
        lines[0] = "John, 12345, true";
        lines[1] = "Miles, 45678, true";

        var o = from x in lines
                let eachLine = x.Split(',')
                select new {
                    name = eachLine[0],
                    zip  = Int32.Parse(eachLine[1]),
                    status = bool.Parse(eachLine[2])
                };
        foreach (var p in o) {
            Console.WriteLine(p.name + " - " + p.zip + ", - " + p.status);
        }
    }
}

I always think a let is always cleaner here. I don't think there is a nicer way other than the split, looks ok to me.

using System;
using System.Linq;

public class Program
{
    public static void Main()
    {
        string [] lines = new string[2];
        lines[0] = "John, 12345, true";
        lines[1] = "Miles, 45678, true";

        var o = from line in 
                    (
                        from inner in lines
                        select inner.Split(',')
                    )
                select new {
                    name = line[0],
                    zip  = Int32.Parse(line[1]),
                    status = bool.Parse(line[2])
                };
        foreach (var p in o) {
            Console.WriteLine(p.name + " - " + p.zip + ", - " + p.status);
        }
    }
}

Another way of doing it is with an inner select @Habib has show the 'fluent' way of doing this below, this is the query version, which I think makes it easier to see wat is going on.

Enjoy your journey into LINQ!

If you can get a copy of Jon Skeet's 'C# In Depth', the section on LINQ is absolutely brilliant. As is the rest of the book.

Answer 2

var query = lines.Select(r => r.Split(','))
                   .Select(t => new
                       {
                           name = t[0],
                           zip = int.Parse(t[1]),
                           status = bool.Parse(t[2])
                       });
foreach (var p in query)
{
    Console.WriteLine(p.name + " - " + p.zip + ", - " + p.status);
}

And you will get:

John - 12345, - True
Miles - 45678, - True