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I want to insert a while loop in the following code in order to insert more than one record.

The code output asks for Name and ID and then print them out in a text file.

Here is my code:

Console.Write(" Enter your ID: ");
int ID = int.Parse(Console.ReadLine());
Console.Write(" Enter your Name: ");
string Name = Console.ReadLine();
Console.WriteLine(" Thank you! you are logged in as " + Name + " " + ID);
StreamWriter sw = new StreamWriter("fileone.txt", true);
Console.SetOut(sw);
Console.WriteLine("Thank you! you are logged in as " + Name + " " + ID);
Console.Read();

sw.Close();

How can I use while loop in order to to let the program ask for another 10 records to enter?

Any answers would be appreciated.

Thanks in advance.

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Do you just need to know how to do a while loop and then you can put it in where ever you need? msdn.microsoft.com/en-us/library/2aeyhxcd(v=vs.71).aspx – DROP table users Apr 25 at 15:14
why don't you just put it in a for loop since it is a static number of times it has to run? – Thewads Apr 25 at 15:22
@DROPtableusers: Btw, the reason I downvoted your (now-deleted) answer is that you opened 10 StreamWriter objects on one file all the same time and didn't synchronize their write buffers in any way. – Ben Voigt Apr 25 at 15:22
@BenVoigt I was trying to illustrate how you would put a while loop in to loop through their code 10 times, your points are valid admittedly, but not what I was trying to illustrate. I think that your comment would have been more helpful than a down-vote. No big deal. – DROP table users Apr 25 at 15:37
@DROPtableusers: I was commenting but you can't leave comments on a deleted answer. – Ben Voigt Apr 25 at 17:03
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2 Answers

up vote 1 down vote accepted

I have reformatted your code. You can use Int32.TryParse() while safely convert ID to Integer. 

                int count = 0;
                while (count < 10)
                {
                    Console.Write(" Enter your ID: ");
                    int ID = int.Parse(Console.ReadLine());

                    Console.Write(" Enter your Name: ");
                    string Name = Console.ReadLine();

                    string output = string.Format("Thank you! you are logged in as {0} {1}", Name, ID);
                    Console.WriteLine(output);
                    File.AppendAllText("fileone.txt", output + Environment.NewLine);

                    count++;
                }
share|improve this answer
Thank you very much. It works very well. – MISHAK Apr 25 at 16:04
2  
It might be desirable to collect all the output in a StringBuilder and use just one file I/O call, instead of repeatedly opening and closing the file. – Ben Voigt Apr 25 at 17:04
Does anyone know how to insert update/delete methods in this code in order to delete specific entries/records from the text file? Thank you. – MISHAK Apr 25 at 17:06
up vote 0 down vote

Not sure I understand. Wrap your code inside a for loop?

for (int i=0; i<10; i++)
{
  ... your code
}

Of course you'll have to use the i loop variable to construct a different tile name for each user Id and password pair.

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