attempted to read or write protected memory!

Question

0.00/5 (No votes)

See more:

my program includes the following code:

C#

try
{
    PrivateRichTextBox1.Text = PrivateRichTextBox1.Text + "Me: " + privateMessageTextBox.Text + "\n";
    PrivateRichTextBox1.SelectionStart = PrivateRichTextBox1.Text.Length;
    PrivateRichTextBox1.ScrollToCaret();
}
catch
{
}

it works perfectly but sometimes the program just stops on the line:

C#

PrivateRichTextBox1.Text = PrivateRichTextBox1.Text + "Me: " + privateMessageTextBox.Text + "\n";

and give me this error:
attempted to read or write protected memory.this is often an indication that other memory is corrupt.

what does that mean ??? what should I do to overcome this error???

thanks in advance :)

Posted 2-Oct-11 2:48am

George_Rasmi

Updated 2-Oct-11 18:38pm

CodingLover

v2

Add a Solution

Comments

Bala Selvanayagam 2-Oct-11 9:19am

I could not re-create the same error message, Is there any specefic sequence or order i need to operate to recreate ?

George_Rasmi 2-Oct-11 12:16pm

you have to write a text in the PrivateMessageTextBox and press Enter to add this text to the PrivateRichTextBox1 ... the code of the PrivateMessageTextBox key_up (Enter) event is this:

private void PrivateMessageTextBox_KeyUp_1(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
PrivateMessageTextBox.Text = PrivateMessageTextBox.Text.Replace("\r\n", "");
if (PrivateMessageTextBox.Text != "")
{
try
{
PrivateRichTextBox1.Text = PrivateRichTextBox1.Text + "Me: " + PrivateMessageTextBox.Text + "\n";
PrivateRichTextBox1.SelectionStart = PrivateRichTextBox1.Text.Length;
PrivateRichTextBox1.ScrollToCaret();
}
catch
{
}
PrivateMessageTextBox.Text = "";
}
}
}
}

but to get that error you will have to execute this function very fast and for many times (I mean try to write one character and then press enter then immediately re write a character and press enter and keep doing this very fast and for many times until the program stops and gives you that error)

[no name] 2-Oct-11 9:22am

That's so strange!
I don't think there is any exception here? Looking at your question I have thought of some kind of accessing and editing some value at some memory address, but your problem is really strange!
Hope others can help you!

Richard MacCutchan 2-Oct-11 12:06pm

Are you sure that both the text box and message box always have some content at the first line above? Add checks for null content before that statement to verify.

George_Rasmi 2-Oct-11 12:20pm

I did that too, but it's not the problem because when I test the program I always write something in the text box

CodingLover 3-Oct-11 0:42am

When you end up with the error, can you find the content in stack trace and post the content here?

Bala Selvanayagam 3-Oct-11 1:27am

Is this happening in random / any sequence of operation?

I have tried your code and have not got any error message,

George_Rasmi 5-Oct-11 3:07am

it happens randomly !

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

RaisKazi · Answer 1 · 2011-10-02T03:24:00

Solution 1

Have a look at below link.

MSDN Forum

Posted 2-Oct-11 3:24am

RaisKazi

Comments

George_Rasmi 2-Oct-11 12:20pm

it didn't help :(

Costica U · Answer 2 · 2011-10-02T18:36:00

Solution 2

It seems that you are not alone. Take a look at http://stackoverflow.com/questions/596413/attempted-to-read-or-write-protected-memory[^]

Posted 2-Oct-11 18:36pm

Costica U