Write text in text file using C#

Question

1.00/5 (1 vote)

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well in to write text box text into text file. i don this but it over ride my previous line data
how can i write new data on new line ?

What I have tried:

C#

using (StreamWriter sw1 = new StreamWriter(@"D:\text.txt"))
            {
                sw1.WriteLine(textBox1.Text);
                sw1.Close();
            }

Posted 8-May-16 9:13am

Mehran Shafqat

Updated 8-May-16 20:58pm

Santosh Kokatnur

v2

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Comments

Philippe Mori 8-May-16 16:03pm

Use code block for code. Don't be too lazy.

3 solutions

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BillWoodruff · Accepted Answer · 2016-05-08T20:58:00

Since version 2.0 of the .NET Framework, writing text to a file is made very easy:

The System.IO facility provides two useful methods:

File.WriteAllText Method [^]

File.WriteAllLines Method [^]

There are ready-to-use code examples at both those links.

These methods have the advantage that, unlike, using the other techniques shown here, they do not append any extra characters to the text saved to the file.

Comments:

1. any time you save whatever to a stream, or file: verify the path you will use is valid, usable, etc., before attempting to write/save.

Consider: if the file already exists if you wish to over-write it.

2. if the user is going to be selecting the save/write location at run-time: take the time to study the File and Folder Selection Dialogs, and how to configure them so the user can be guided to an appropriate choice.

3. keep in mind that Text is encoded, and may be culture-dependent. plan for that.

Karthik_Mahalingam · Accepted Answer · 2016-05-08T09:26:00

Solution 1

use File.AppendText[^] , well there are many ways to do. this is one of the way.

C#

using (StreamWriter sw1 = File.AppendText(@"D:\text.txt"))
            {
                sw1.WriteLine(textBox1.Text);
               // sw1.Close(); // not necessary, since you are using 'using', it will close while disposing
            }

Posted 8-May-16 9:26am

Karthik_Mahalingam

Updated 8-May-16 9:43am

v3

Comments

Sergey Alexandrovich Kryukov 8-May-16 18:17pm

Right, one of the ways; a 5.
—SA

Karthik_Mahalingam 8-May-16 22:40pm

Thanks Sergey

ThanhNT14 · Accepted Answer · 2016-05-08T17:34:00

Solution 2

You can add option append or not append for StreamWriter.

C#

using (StreamWriter sw1 = new StreamWriter(@"D:\text.txt", true))
{
sw1.WriteLine(textBox1.Text);
sw1.Close();
}

true: add new item on new line.
false: overwrite current file

Posted 8-May-16 17:34pm

ThanhNT14