Conversion of array string to array ulong in c#

Question

I have a array of strings having values

string[] words = {"0B", "00", " 00",  "00",  "00", "07",  "3F",  "14", "1D"};

I need it to convert into array of ulong

ulong[] words1;

How should I do it in c#
I think I should add some background.
The data in the string is coming from textbox and I need to write the content of this textbox in the hexUpDown.Value parameter.

What have you tried? Just google for "convert string to ulong" and then repeat that for every element in your array. — MakePeaceGreatAgain, Sep 26 '18 at 14:22
ulong words1 = Convert.ToUInt64(words[1]); Have tried it, but when I execute it I get a error saying "Input string not in correct format" — Parnal p, Sep 26 '18 at 14:25
And try to learn LINQ as soon as possible, it'll make things like this much easier. — SoptikHa, Sep 26 '18 at 14:25
@SoptikHa That´s a really bad suggestion and makes programmers over-use LINQ as "magic tool to make everything easier", while that often leads to harder to read code. In particular if you don´t know the basics behind, which is good old-style looping. — MakePeaceGreatAgain, Sep 26 '18 at 14:27
ulong[] words1 = words.Select(ulong.Parse).ToArray(); I did try this as well, but it gives me the same error. I need to put this value in a hexUpDown.Value which is a part of my design layout — Parnal p, Sep 26 '18 at 14:28
@HimBromBeere I know it can be harder to read, but isn't this a problem that could be (and should be) solved with linq easily? I'm not professional, but I love when I can use LINQ instead of multiple for loops. I personally think LINQ is even more readable than loops with more complex arrays and objects. When I was learning LINQ, I used these simple problems to practice, which helped me a lot when I encountered complex collections later. This experience led me to suggest him to learn it on this problem. — SoptikHa, Sep 26 '18 at 15:42

James Robert Pattison · Answer 1 · 2018-09-26T14:45:14.057

2

var ulongs = words.Select(x => ulong.Parse(x, NumberStyles.HexNumber)).ToArray();

edited Sep 26 '18 at 14:45

answered Sep 26 '18 at 14:32

James Robert Pattison

161
1
9

score 0 · Answer 2 · answered Sep 26 '18 at 14:45

If you need to combine the bytes into 64 bit values then try this (assumes correct endieness).

string[] words = { "0B", "00", " 00", "00", "00", "07", "3F", "14", "1D" };
var words64 = new List<string>();
int wc = 0;
var s = string.Empty;
var results = new List<ulong>();

// Concat string to make 64 bit words
foreach (var word in words) 
{
    // remove extra whitespace
    s += word.Trim();
    wc++;

    // Added the word when it's 64 bits
    if (wc % 4 == 0)
    {
        words64.Add(s);
        wc = 0;
        s = string.Empty;
    }
}

// If there are any leftover bits, append those
if (!string.IsNullOrEmpty(s))
{
    words64.Add(s);
}

// Now attempt to convert each string to a ulong
foreach (var word in words64)
{
    ulong r;
    if (ulong.TryParse(word, 
        System.Globalization.NumberStyles.AllowHexSpecifier, 
        System.Globalization.CultureInfo.InvariantCulture, 
        out r))
    {
        results.Add(r);
    }
}

Results:

List<ulong>(3) { 184549376, 474900, 29 }

Alternatively, I might prefer `for (int i=0; i < (items.Count / 4) + 1; i++) { words64.Add(string.Join(string.Empty, items.Skip(i*4).Take(4))); }` — BurnsBA, Sep 26 '18 at 15:08
ulong words1 = Convert.ToUInt64(words[1],16); This Simply worked for me than any other solutions, bur thanks anyway. — Parnal p, Sep 27 '18 at 11:04

Conversion of array string to array ulong in c#

2 Answers2