CODEWITHSUNDEEP
c#text-files
jo13
jo13

Reputation: 209

Replacing the same string multiple times in a file with different input in C#

I currently have a text file that has a couple of sentences that looks like this:

Hello. Your name is <name> and the username you have chosen is <username>. 
Your password is <password>. Your friend's username is <username> 
and their password is <password>.

What I first do is ask the user the following questions:

 public string questions(string sentences)
            {
                Console.Write("Enter Your Name: ");
                string name = Console.ReadLine();
                Console.Write("Enter Your Username: ");
                string userName= Console.ReadLine();
                Console.Write("Enter Your Password: ");
                string password= Console.ReadLine();
                string textFile = File.ReadAllText(sentences);
                textFile = textFile.Replace("<name>", name);
                textFile = textFile.Replace("<username>", userName);
                textFile = textFile.Replace("<password>", password);
                File.WriteAllText(sentences, textFile);
                return textFile;
        }

When the user inputs their name, it's not a problem because there is only one <name>, however, when it comes to the password and username, it's a problem. For example, when the user inputs the username, it replaces everything in the file that says <username> when I only want to replace the first <username>. What I would like this program to do is to read the file and every time it encounters <name>, <password>, or <username> to prompt the user to enter their name, password or username and replace only that placeholder, not all the placeholders with similar names.

Is there a way I can edit my current code to achieve this? I thought about numbering stuff in the text file like <name1> or <username1> but then this would only work with this particular text file. What if the text file contains an unknown amount of usernames or passwords?

Upvotes: 0

Views: 217

Answers (1)

Gene R
Gene R

Reputation: 3744

you can try Regex.Replace

var regex = new Regex("<username>");
textFile = regex.Replace(textFile, userName, 1);

Upvotes: 2

Related Questions