Convert first index in array to int

Question

I have a list of strings called parentRows which contains strings that look like this:

"176,c-4454"
"177,c-34324"

I've used .split(',') to put them in a string[]

var arr = parentRow.Split(',');

because essentially what I want is that when I loop through the list, if the user input matches arr[1], then I want to convert arr[0] to an int and store it in the user's information.

Code snippet:

if (p.ParentCode != "")
{                   
    foreach(var parentRow in parentRows)
    {
        var arr = parentRow.Split(',');
                           
        if(arr[1] == p.ParentCode)
        {
            int asInt = arr[0].Select(s => int.Parse(s));
        }
    }
}

as you can see I've tried int asInt = arr[0].Select(s => int.Parse(s)); but I just get the error

"Error CS1503 Argument 1: cannot convert from 'char' to 'System.ReadOnlySpan<char>"

How would one go about achieving what I want?

Thank you in advance!

TheGeneral · Accepted Answer · 2020-10-23 09:30:07Z

5

I guess you just want to parse element 0 (arr[0])

int value =  int.Parse(arr[0])

The long story is SomeString.Select projects a string to an array of char, and int.Parse has an overload for ReadOnlySpan. The compiler assumes through the overload resolution that is the best fit for what want to do. Which is what the error is telling you

"Error CS1503 Argument 1: cannot convert from 'char' to 'System.ReadOnlySpan"

answered Oct 23, 2020 at 9:30

TheGeneral

82k9 gold badges111 silver badges151 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Michał Turczyn · Accepted Answer · 2020-10-23 09:35:26Z

2

Try below code:

if(! string.IsNullOrEmpty(p.ParentCode) )
{
    var l = parentRows
      .Select(r => r.Split(','))               // split every item in array by comma
      .Where(r => r[1] == p.ParentCode)        // select only those, which second element matches the code
      .Select(r => int.Parse(r[0])).ToArray(); // select only first element of slpitted string casting it to int
}

answered Oct 23, 2020 at 9:35

Michał Turczyn

41.2k18 gold badges58 silver badges87 bronze badges

Collectives™ on Stack Overflow

Convert first index in array to int

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related