Open a .txt file into a richTextBox in C#

Question

I want to be able to open a .txt file up into a richtextbox in c# and also into a global variable i have made called 'notes' but don't know how to do this. This is the code i have at the moment:

OpenFileDialog opentext = new OpenFileDialog();
if (opentext.ShowDialog() == DialogResult.OK)
{
    richTextBox1.Text = opentext.FileName;
    Globals.notes = opentext.FileName;
}

Only problem is it doesn't appear in neither the richtextbox nor in the global varibale, and the global allows it to be viewed in another richtextbox in another form. So please can you help, with ideally the .txt file going into both,

Thanks

score 9 · Accepted Answer · answered Dec 01 '10 at 17:10

9

Do you mean you want to have the text displayed or the filename?

richTextBox1.Text = File.ReadAllText(opentext.FileName); 
Globals.notes = richTextBox1.Text;

You probably also want to correct this to:

if (opentext.ShowDialog() == DialogResult.OK)

answered Dec 01 '10 at 17:10

BlueVoodoo

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I want the text displayed, that is my problem, and trying your code it doesn't recognise the File.ReadAllText part for some reason? – Chris Bacon Dec 01 '10 at 17:19
3

Add 'using System.IO;' or 'System.IO.File.ReadAllText(opentext.FileName);' – BlueVoodoo Dec 01 '10 at 17:55

score 1 · Answer 2 · edited Oct 13 '13 at 15:12

1

if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
    System.IO.StreamReader sr = new System.IO.StreamReader(openFileDialog1.FileName);
    richTextBox1.Text = sr.ReadToEnd();
    sr.Close();
}

edited Oct 13 '13 at 15:12

Anatoliy Nikolaev

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answered Oct 13 '13 at 14:52

Ayush Giri

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score 1 · Answer 3 · answered Dec 01 '10 at 17:15

1

In c# there are not global variables. The closest thing you can get is to make the variable "public static". But a better solution would be to make it an instance variable of an object you have access to, for example your main window class.

answered Dec 01 '10 at 17:15

codymanix

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That is what i am doing, i just the names mixed up, sorry – Chris Bacon Dec 01 '10 at 17:22

score 0 · Answer 4 · answered Dec 13 '13 at 19:10

Try using this, I used it for a chat program and it works fine, you can set your timer rate to whatever you want. You also don't have to use a timer, you can have a button initiate the refresh of the rich text box.

    private void refreshRate_Tick(object sender, EventArgs e)
    {
        richTextBox1.Text = File.ReadAllText(@"path.txt");
    }

Hope this helps!

score 0 · Answer 5 · answered Dec 01 '10 at 17:10

0

FileName property of OpenFileDialog control just gives the full path of file selected by user. In order to read the content of this file, you will need to use a method like File.ReadAllText.

answered Dec 01 '10 at 17:10

Hemant

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I'm using C# 2010 and i don't know it this could be the reason but it does not recognise File.ReadAllText for some reason, what do you think could this be? – Chris Bacon Dec 01 '10 at 17:31
Add 'using System.IO;'at the top of source file. – Hemant Dec 02 '10 at 02:56

score 0 · Answer 6 · answered Dec 25 '21 at 10:32

I hope, I am not late. It seems like there is something like:

OpenFileDialog opentext = new OpenFileDialog();
if (opentext.ShowDialog() == DialogResult.OK)
{
    string selectedFileName = opentext.FileName;
    richTextbox.LoadFile(selectedFileName, RichTextBoxStreamType.UnicodePlainText);
}

Refs

Open a .txt file into a richTextBox in C#

6 Answers6

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