SaveFile RichTextBox Problem

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I have a RichTextBox and a Button. 3

This is my code to save the text that was written.

C#

richTextBox1.SaveFile(@"c:/users/hp/desktop/Chat.txt");
richTextBox1.Clear();

I write in the richtextbox but when I click on the Button it doesn't add my new text to previous text file.

Any Idea?

Posted 3-Nov-10 21:45pm

pampam110

Updated 3-Nov-10 22:58pm

Dalek Dave

v2

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Dalek Dave 4-Nov-10 4:58am

Edited for Grammar and Syntax.

6 solutions

Solution 3

There is no Overload available in richtextbox.SaveFile for File appending...

Use the below code to slove your Problem

C#

if (File.Exists("c:\\temp.txt"))
 {
     byte[] FileBuf = File.ReadAllBytes("c:\\temp.txt");
     byte[] RichBuf = Encoding.ASCII.GetBytes(richTextBox1.Text);
     byte[] Total = new byte[FileBuf.Length + RichBuf.Length];
     System.Buffer.BlockCopy(FileBuf, 0, Total, 0, FileBuf.Length);
     System.Buffer.BlockCopy(RichBuf, 0 , Total, FileBuf.Length , RichBuf.Length);
     File.WriteAllBytes("c:\\temp.txt", Total);
 }

Posted 4-Nov-10 0:00am

Rajesh Anuhya

Comments

William Winner 5-Nov-10 15:38pm

this does work, but you're forgetting a very important part of the RichTextBox...the formatting information.

Instead of
byte[] RichBuf = Encoding.ASCII.GetBytes(richTextBox1.Text);
use:
byte[] RichBuf = Encoding.ASCII.GetBytes(richTextBox1.Rtf);

and then you'll preserve the formatting

Solution 1

hi,

try this

richTextBox1.SaveFile("c:\\users\\hp\\desktop\\Chat.txt", RichTextBoxStreamType.RichText)

jerem

Posted 3-Nov-10 22:16pm

JeremH

Comments

pampam110 4-Nov-10 4:52am

thanks. but i guess i didn't mention what i want.
i write something in the richtextbox and then by click the button, it saves to "Chat.txt"
then i clear the text, and write new sentences... i want to save new sentences + old sentences in "Chat.txt"
can you guide me about this problem...
thanks again.

Rajesh Anuhya 4-Nov-10 8:07am

This is not the OP's Requirement....

Solution 2

Use this to find the end and insert an informations

C#

using System;
using System.IO;
class DirAppend
{
    public static void Main(String[] args)
    {
        using (StreamWriter w = File.AppendText("log.txt"))
        {
            Log ("Test1", w);
            Log ("Test2", w);
            // Close the writer and underlying file.
            w.Close();
        }
        // Open and read the file.
        using (StreamReader r = File.OpenText("log.txt"))
        {
            DumpLog (r);
        }
    }
    public static void Log (String logMessage, TextWriter w)
    {
        w.Write("\r\nLog Entry : ");
        w.WriteLine("{0} {1}", DateTime.Now.ToLongTimeString(),
            DateTime.Now.ToLongDateString());
        w.WriteLine("  :");
        w.WriteLine("  :{0}", logMessage);
        w.WriteLine ("-------------------------------");
        // Update the underlying file.
        w.Flush();
    }
    public static void DumpLog (StreamReader r)
    {
        // While not at the end of the file, read and write lines.
        String line;
        while ((line=r.ReadLine())!=null)
        {
            Console.WriteLine(line);
        }
        r.Close();
    }
}

Posted 3-Nov-10 23:27pm

JeremH

Solution 5

Hi
Try it,

using System.IO;

C#

using (StreamReader sr = new StreamReader(@"c:\teste\chat.txt"))
            {
                string text = string.Format("{0}\n{1}", sr.ReadToEnd(), richTextBox1.Text);
                sr.Close();
                using (StreamWriter sw = new StreamWriter(@"c:\teste\chat.txt"))
                {
                    sw.WriteLine(text);
                }
            }

Posted 5-Nov-10 9:08am

osmar.v.c.n

Solution 4

It's Quite Simple...

VB

Dim sw As New StreamWriter("C:\aaa.txt")
sw.Write("Anything U Want To Write....")
sw.Close()

Posted 5-Nov-10 2:33am

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William Winner · Accepted Answer · 2010-11-05T09:45:00

Everyone here seems to be missing the point that this is a RichTextBox!

I am assuming that you want to preserve the formatting information that can be entered into the RichTextBox.

Others are also making it way more complex than it needs to be.

Basically, you want to append the information to the file. But, you want to write the RichText, not the Text.

So, the RichTextBox provides a property called Rtf that is the text with the rich text formatting.

If you want to take the original file and append it, just open a stream writer using File.AppendText and then write the text...like so:

C#

using (StreamWriter writer = File.AppendText(@"c:\teste\chat.txt"))
{
  writer.Write(richTextBox1.Rtf);
}

it's that simple...

SaveFile RichTextBox Problem

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Solution 6

Solution 3

Solution 1

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