Comments by Midnight Ahri (Top 23 by date)

Thank you, that's exactly where I got the code.
I had read offset and count explanation.
I need to know what condition that will cause the 'while' to loop more than once.

Thats what I need to solve my problem. I apologize of my poor written code. :(

Thankyou very much for your answer, it works for any files now.
Nothing is wrong in my code, the reason why it's not interesting and makes no sense is because my code is messy.
Whatever, I'm going to get A+. =D

Lol.
Actually this code is correct, just like what is in my lecturer powerpoint.
First step is to convert both text and key to ascii code / decimal, then convert the ascii code to binary.
Then combine both binary and convert it back to decimal, and the last step, convert back to text.
I know this encryption is stupid, what I do is also stupid.
But seriously, this is the last step, to encrypt word document.
Everything is already complete.
I can even encrypt/decrypt text document perfectly.
Just like what you said, I encrypt everything including the file binary header that represent the file type or whatever it is that was written in wikipedia.
Thats why the file corrupted.
I know that I can simply call dot net cryptography library.
But even how stupid this project is, my lecturer still able to know that I'm not doing it myself.

Thank you very much for the information, it helps a lot. =D

Thank you very much for the information.
How if I ignore doc / docx / whatever it is.
I'll just read the byte / byte from the file and encrypt it using vernam cipher.
I can even encrypt anything with that.
Is this a good solution?

Now I got my Vernam Cipher Encryption, but still I need a way to read Word Document plain text.
I can't simply choose the file and encrypt it right?

Yes it's true that Caesar Cipher is very weak.
But my main point is to get plain text from word documents.
Can you provide me information about that?

Sorry for my terrible information.
I'm using Caesar Cipher that encrypt character one by one.
Read text file, encrypt then modify text file.
I need explanation of how to read string in word document file without the xml format.

Thank you for answering, my problem is when I combine the character binary and key binary, convert it to ascii code, and convert back to char, it return \0.
Thats why the length of encryption result differ from the text.

Hi, thank you for your interest in helping.
The current device is U.are.U 5000 from Digital Persona.

After googling BioFinger, I'm interested in learning how to connect to that machine.
Can you explain more about BioFinger?

Where exactly I had to put this?
I tried both custom control and my form, still nothing change.
Actually it's not only color, forexample I set multiline to true.
It's still false in the form, it's like the control didn't update anymore from my custom control.

The link is deleted.
Btw I'm pretty sure before I restore my laptop, it's still working.

Yeah I think it's working before I restored my laptop to factory setting and reinstall everything again.
Yes it is in the same project.

So am I wrong about the null value?

I'm not sure what you're doing there, but if you use my code above, you can simply add a int variable and +1 it everytime the loop enter the if.

for (int i = 0; i <= this.dataGridView1.Rows.Count - 1; i++)
{
if ((bool)this.dataGridView1.Rows[i].Cells["ColName"].Value == true)
{
//your query execution here
x += 1;
}
}

Addition :
Save the x variable.

FYI, Object reference not set to an instance of an object means something is null.
And I'm refering to "(bool)this.dataGridView1.Rows[i].Cells["ColName"].Value"
If you're still sure everything is not null, then you had to find out where the error occur and what's null there.

If you're saying my code is not working, then you had to find another solution.
My suggestion, put a breakpoint and search for the code that return that error.

You had to make sure the cell had value.

I changed the solution, "ColName" is the name of your checkbox column.
Tell me if it works.