Save Array to text in C#

Question

I've read a file from a text file and parsed the data I want, but I don't know how to save the parsed data in form to the file. Are you able to assist me? I've also included a snippet from the file. https://ibb.co/G5hTtky --> link for the image

public static void Main(string[] args)
    {
        StreamReader streamReader = File.OpenText(@"C:\Users\asr050322.txt");
        string text = streamReader.ReadToEnd();
        
        string[] linesArray = text.Split("BOH");
            for (int i = 0; i < linesArray.Length; i++)
            {
                if (linesArray[i].Substring(24, 5) == "UXOAP")
                {
                 File.WriteAllLines(@"C:\Users\HeUXOAP050322.txt", Array.ConvertAll(linesArray[i], x => x.ToString()));
                }

                if (linesArray[i].Substring(24, 5) == "UXOGS")
                {
                 File.WriteAllLines(@"C:\Users\UXOGS050322.txt", Array.ConvertAll(linesArray[i], x => x.ToString()));
                }
            }
    }

Are you looking for File.AppendAll(Lines|Text) ...

spzvtbg
– spzvtbg

2022-05-27 13:21:17 +00:00
Commented May 27, 2022 at 13:21 — spzvtbg
– spzvtbg, Commented May 27, 2022 at 13:21

Sean · Accepted Answer · 2022-05-27 13:21:54Z

2

File.WriteAllLines() will overwrite an existing file, so as you loop, you will only keep the latest data.

Use File.AppendText("path/to/file", linesArray[i]); This will create a file if it does not exist, then appends the data to the end of the existing file.

answered May 27, 2022 at 13:21

Sean

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2 Comments

Bigask Over a year ago

thank you very much, i did AppendAllText and it worked, and i have another question how do we prepend a string or a character to LinesArray[i]

Sean Over a year ago

as simple as string line = "prefix_string" + linesArray[i]. if you need to build a string with a lot of concats, replacing, etc, check out StringBuilder

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