Char array to a String using .NET system?

Question

How can I store the contents of a char array into a text file in C# with .NET? I have tried

char[] characters = VarInput.ToCharArray();
System.IO.File.WriteAllText(@"C:\Users\leoga\Documents\Projects_Atom\Pad_Wood\WriteText2CharacterArray.txt", characters);

but it comes up with an error message saying

Argument 2: cannot convert from 'char[]' to 'string'
[C:\Users\leoga\Documents\Projects_Atom\Pad_Wood\converter.csproj]

I have also tried it with File.WriteAllLines() but it still doesn't work. I am using c# and .NET

Is the `VarInput.ToCharArray()` just for sample purposes and your code is really passed/provided a `char[]` with no way to associate it with the original `string` (or there was no `string` to begin with)? Or you do have a `string` and were thinking it can only be written to a file as individual `char`s? — Lance U. Matthews, Dec 01 '19 at 00:44

score 4 · Accepted Answer · answered Nov 30 '19 at 22:07

What type is VarInput? If it's a string initially, just remove the ToCharArray() call and you can write it to a file directly with File.WriteAllText.

File.WriteAllText(path, VarInput);

Once you have a char array, you don't have to convert to a string in order to write to a file. You can also write bytes directly.

var bytes = System.Text.Encoding.UTF8.GetBytes(characters);
File.WriteAllBytes(path, bytes);

ChaosFish · Answer 2 · 2019-12-01T00:40:09.003

0

Reason

Because OP converted the string to an array when there wasn't a need to, you can use it directly.

Other way

code

        public void Write(string path)
        {
            FileStream fs = new FileStream(path, FileMode.Create);
            using (fs)
            {
                StreamWriter sw = new StreamWriter(fs);
                using (sw)
                {
                    string VarInput = "11111111";
                    char[] characters = VarInput.ToCharArray();
                    sw.Write(characters);
                }
            }
        }

About doc

edited Dec 01 '19 at 00:40

answered Nov 30 '19 at 22:16

ChaosFish

62
1
8

It has been updated. Thank you for pointing out. – ChaosFish Dec 01 '19 at 00:42

score -1 · Answer 3 · edited Nov 30 '19 at 22:13

-1

There should be a built in function to run joins on Arrays, converting to String.

Here's an example of doing this to export an array as a CSV:

String result = String.Join(",",arr)

If you're looking to just convert to a String without any delimiters, you can do something like this:

String result = String.Join("",arr)

edited Nov 30 '19 at 22:13

sticky bit

36,626
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answered Nov 30 '19 at 21:52

mochsner

307
2
10

1

Passing an empty string and a `char[]` to `String.Join()` would be the less-efficient alternative to just passing the `char[]` to the [`String(char[])` constructor](https://learn.microsoft.com/dotnet/api/system.string.-ctor#System_String__ctor_System_Char___) (i.e. `String result = new string(arr);`). – Lance U. Matthews Dec 01 '19 at 00:27

Char array to a String using .NET system?

3 Answers3

Reason

Other way