CODEWITHSUNDEEP
c#text
user2828891
user2828891

Reputation: 21

Replace specfic text at a line

I want to replace a specific text at in a line at a specific part. Example text:

begin 355 weapon item_type=weapon
begin 356 armor item_type=armor

I want to replace item_type=weapon to item_type=none at line 1 by value 355 from it without replacing all weapon text from it and to not clean all lines and replace all with 1 line. Here is my code so far:

private void button2_Click(object sender, EventArgs e)
{
    var data = File
                .ReadLines("itemdata.txt")
                .Where(x => x.Contains(itemSrchtxt.Text))
                .Take(1)
                .SelectMany(x => x.Split('\t'))
                .Select(x => x.Split('='))
                .Where(x => x.Length > 1)
                .ToDictionary(x => x[0].Trim(), x => x[1]);
    StreamReader reader = new StreamReader(Directory.GetCurrentDirectory() + @"\itemdata.txt");
    string content = reader.ReadLine();
    reader.Close();
    content = Regex.Replace(content, data["item_type"], textitem_type.Text);
      StreamWriter write = new StreamWriter(Directory.GetCurrentDirectory() + @"\itemdata.txt");
    write.WriteLine(content);
    write.Close();
}

Here is the real line I use:

item_begin  questitem   783 [_alankells_receipt]    item_type=questitem

Upvotes: 0

Views: 138

Answers (1)

acfrancis
acfrancis

Reputation: 3681

This isn't in LINQ but LINQ looks like overkill for what you want:

var lines = File.ReadAllLines(Directory.GetCurrentDirectory() + @"\itemdata.txt");
if (lines.Length > 0)
{
    var fields = lines[0].Split('\t');
    if (fields.Length >= 4 && fields[1] == "355" && fields[3] == "item_type=weapon")
        fields[3] = "item_type=none";
    lines[0] = string.Join("\t", fields);
}
File.WriteAllLines(Directory.GetCurrentDirectory() + @"\itemdata.txt", lines);

Complete test

Create a file called C:\temp\t.txt. Open it in Notepad and paste this in:

begin   355 weapon  item_type=weapon
begin   356 armor   item_type=armor

Make sure there is a tab (\t) and not a space between 355 and weapon and same on the second line between 356 and armor (the tab is coming out as a space when I copy-paste). Save the file and close Notepad.

Run this code (I use LinqPad):

var lines = File.ReadAllLines(@"C:\temp\t.txt");
if (lines.Length > 0)
{
    var fields = lines[0].Split('\t');
    if (fields.Length >= 4 && fields[1] == "355" && fields[3] == "item_type=weapon")
        fields[3] = "item_type=none";
    lines[0] = string.Join("\t", fields);
}
File.WriteAllLines(@"C:\temp\t.txt", lines);

Open the file again in Notepad.

Upvotes: 2

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