C# cannot convert from 'string' to systems.io; HELP?

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The purpose of the code is for to enter a new users data, and write it to that users file. But the file name needs to be created in the users name.

I had the data being written to the file working completely fine, but when I tried to make the name generate from the variable, it doesn't work. I get errors such as:
Argument 1: cannot convert from 'string' to 'System.IO.Stream' FUNCOCO2

Error CS0165 Use of unassigned local variable 'sName' FUNCOCO2

Error CS1503 Argument 2: cannot convert from 'string' to 'System.Text.Encoding'

As you can probably tell, I'm very new to programming.

What I have tried:

case 2: //enter new user
                        //Enter new user information and add them to file
                    Console.Write("Please Enter the number of users you wish to log: ");
                    iUserNumber = Convert.ToInt32(Console.ReadLine());

                    //open file for writing, in APPEND mode
                    using (StreamWriter sw = new StreamWriter("NewUser" +sName,".txt", true))
                    {

                        //loop for each user
                        for (iCount = 1; iCount <= iUserNumber; iCount++)
                        {
                            // enter details
                            Console.Write("Please Enter your Name" + iCount + ": ");
                            sName = Console.ReadLine();

                            Console.Write("Please Enter the Name of your School: ");
                            sSchoolName = Console.ReadLine();
                            Console.WriteLine();

                            Console.Write("Please Enter the Name of your Class: ");
                            sClassName = Console.ReadLine();

                            // write to file
                            sw.WriteLine(sName);
                            Console.WriteLine();
                            sw.WriteLine(sSchoolName);
                            Console.WriteLine();
                            sw.WriteLine(sClassName);


                            Console.WriteLine("User data entered: ");

                        }

                    }

Posted 1-Dec-16 2:51am

Member 12881221

Updated 1-Dec-16 5:02am

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Comments

cvogt61457 1-Dec-16 9:43am

Which lines are having the errors?
What are the types of sName, sSchoolName, and sClassName? (I'm guessing string)

2 solutions

Solution 3

When you're creating the StreamWriter object, you don't yet know the users name because you haven't asked for it yet. I would do it this way:

C#

case 2: //enter new user
{
    //Enter new user information and add them to file
    Console.Write("Please Enter the number of users you wish to log: ");
    iUserNumber = Convert.ToInt32(Console.ReadLine());

    for (int i = 1; i < iUserCount; i++)
    {
        // enter details
        Console.Write("Please Enter your Name: ");
        sName = Console.ReadLine();
        Console.WriteLine();

        Console.Write("Please Enter the Name of your School: ");
        sSchoolName = Console.ReadLine();
        Console.WriteLine();

        Console.Write("Please Enter the Name of your Class: ");
        sClassName = Console.ReadLine();

        // write to file (using a method)
        CreateUserFile(sName, sSchool, sClass);
    }
}
break;

and the method would look like this:

C#

private void CreateUserFile(string studentName, string schoolName, string className)
{
    using (StreamWriter writer = new StreamWriter(string.Concat("NewUser_", studentName, ".txt"), true))
    {
        writer.WriteLine(name);
        writer.WriteLine(school);
        writer.WriteLine(className);
    }
}

Of course, this code is not robust at all, because there is no error handling to prevent "stupid user tricks"™, but I suppose that's okay since this is homework.

Posted 1-Dec-16 5:02am

#realJSOP

Updated 1-Dec-16 7:34am

v2

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OriginalGriff · Accepted Answer · 2016-12-01T03:53:00

Probably, it's this line:

C#

using (StreamWriter sw = new StreamWriter("NewUser" +sName,".txt", true))

(But double clicking the error message will take you to the right line just to be sure)
And it's probably teh comma that is doing it.
Change:

C#

new StreamWriter("NewUser" +sName,".txt", true))

To:

C#

new StreamWriter("NewUser" +sName+".txt", true))

or better:

C#

string path = string.Format("NewUser{0}.txt", sname);
using (StreamWriter sw = new StreamWriter(path, true))

And you should be fine.
It would be a good idea to use a folder other than the default though: it works in development but tends to fail in production because the application folder is write protected. Better to get used to using a specific data folder which is always read / write instead.