How do I assign the value of a textbox as a filename

Question

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I writing a small file application.

I have two text boxes, "textBox1" is for entering a note for a file, this creates a .txt file.

Second one is to read from the file. I need to assign the value of TextBox1 to a variable(filename) so that it will name the text file dynamically. I may be going about this the wrong way. Any help will be greatly appreciated. Below is the code. Waiting for some reply.

private void btnWrite_Click(object sender, EventArgs e)
 {
     String filename = textbox1.Text;
      // write a line of text to the file
     TextWriter te = new StreamWriter(???);
      // close the stream
     te.Close();
 }

 private void btnRead_Click(object sender, EventArgs e)
 {
     // create reader & open file
     TextReader tr = new StreamReader(???);

     // read a line of text
     txtRead.Text = tr.ReadLine();

     // close the stream
     tr.Close();
 }

Posted 14-Mar-12 0:36am

Member 8648589

Updated 17-May-16 22:47pm

RaisKazi

v3

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5 solutions

Solution 5

Try this

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace CP_346448_How_do_I_assign_the_value_of_a_textbox_as_a_filena
{
    class Program
    {
        static void Main(string[] args)
        {
              String filename ;
            filename=Console.ReadLine();
             // write a line of text to the file
            TextWriter te = new StreamWriter(filename );
             // close the stream
            te.WriteLine("Hi");
            te.Close();

             // create reader & open file
            TextReader tr = new StreamReader(filename);
 
            // read a line of text
           Console.WriteLine( tr.ReadLine());
           
            // close the stream
            tr.Close();
            Console.ReadKey();
        }
      
    }
}

Posted 14-Mar-12 2:00am

RDBurmon

Comments

Member 8648589 14-Mar-12 8:03am

where the file will be created,since we are not specifying the file path..

nagendrathecoder 14-Mar-12 8:08am

This won't create a file. OP wants to create and write file.

Member 8648589 14-Mar-12 8:11am

but i want the file to be created with that textbox value name...:(

nagendrathecoder 14-Mar-12 8:16am

check the link in my updated answer. You can use File.Create method to create a file.

Member 8648589 14-Mar-12 8:23am

but can we use the textbox value to be the filename....

for ex....if i type in the textbox "hello"....i want the file to be created as hello.txt..is there any possible way i can do that....

nagendrathecoder 14-Mar-12 8:36am

yes, just supply this value to File.Create() method after adding some directory name to filename e.g c:\hello.txt.

RDBurmon 15-Mar-12 9:52am

Hello OP ,
I think you got your answer if no then reply

Solution 3

you can directly create the file using the following Method of file class.

System.Io.file.writealltext(filePath,Filecontent);

here filePath is going to be the full address of your file location.

i.e, if u having a folder (coding) in D: drive of u r system.
then so the filePath must be concatinated with u r filename.

if u r textbox1.value is File1.txt

then filePath=D:\coding\File1.txt

so u can give filename dynamically from U r textbox.

Posted 14-Mar-12 1:34am

Pasha494

Comments

Member 8648589 14-Mar-12 8:15am

error is cuming in the code
System.Io.file.writealltext(filePath,Filecontent);

there is no writealltext method in System.io.file

Solution 2

Your code is refactored as:

C#

private void btnWrite_Click(object sender, EventArgs e)
 {
     String filename = textbox1.Text;
      // write a line of text to the file
     TextWriter te = new StreamWriter(???);
     using (StreamWriter writer = new StreamWriter(filename))
     {
           writer.Write("content to be written");
           // close the stream
           writer.Close();
     }
 }

C#

private void btnRead_Click(object sender, EventArgs e)
{
    // create reader & open file
    TextReader tr = new StreamReader(???);


	using (StreamReader reader = new StreamReader(filename))
	{
	        // read a line of text
	        txtRead.Text = reader.ReadLine();

           // close the stream
           reader.Close();
	}
}

Posted 14-Mar-12 1:34am

Ganesan Senthilvel

Comments

Member 8648589 14-Mar-12 7:45am

where the file will be created,since we are not specifying the file path...

Member 8648589 14-Mar-12 8:24am

but can we use the textbox value to be the filename.... for ex....if i type in the textbox "hello"....i want the file to be created as hello.txt..is there any possible way i can do that....

nagendrathecoder 14-Mar-12 8:36am

yes, just supply this value to File.Create() method after adding some directory name to filename e.g c:\hello.txt.

Solution 1

What problem are you facing? Are you getting any error?

If you want to know how to read and write using StreamReader and StreamWriter then refer this[^]

-----------Updated--------------------
Chech this[^]

Posted 14-Mar-12 1:27am

nagendrathecoder

Updated 14-Mar-12 1:53am

v2

Comments

Member 8648589 14-Mar-12 7:31am

i want to use the textbox value that we enter to be the name of file in which the value gets stored...

private void btnWrite_Click(object sender, EventArgs e)
{
String filename = textbox1.Text;
// write a line of text to the file
TextWriter te = new StreamWriter(filename);
// close the stream
te.Close();
}

when i give code like this ..no file is created..

nagendrathecoder 14-Mar-12 7:53am

check my updated solution,

nagendrathecoder 14-Mar-12 7:56am

Check my updated solution. You can use File.Create() method to create a file.

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ProEnggSoft · Accepted Answer · 2012-03-14T02:38:00

You can try

C#

private void btnWrite_Click(object sender, EventArgs e)
{
//Application.StartupPath gives the path of the executable file of the application.
    String filename = string.Format("{0}\{1}.txt",Application.StartupPath, textbox1.Text);
    string textToWrite = "Assign the text to write here";
    File.WriteAllText(filename, textToWrite);

    //You can use
    //File.AppendAllText(filename, textToWrite);
    //to append the text to the end of an existing file

}
private void btnRead_Click(object sender, EventArgs e)
{
    String filename = String filename = string.Format("{0}\{1}.txt",
                Application.StartupPath, textbox1.Text);
    string textFromFile = File.ReadAllText(filename);
}

How do I assign the value of a textbox as a filename

5 solutions

Solution 6

Solution 5

Solution 3

Solution 2

Solution 1

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