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Uhhhh.... yeah. You might want to remove your garbage post.
If you're trying to show someone how to do some kind of validation, you're post is completely unreadable and inappropriate. Write an article or tip/trick on it and EXPLAIN WHAT YOU'RE DOING!
If you're trying to ask a question, all you did was post a code dump with no explanation of a problem at all.
Either way, there's nothing anything can do to help until you start explaining what you're intention is with this post.
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Can you not tell the difference between C# and JavaScript?
This space for rent
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I have a mainform (MDI form) and I have another form (Form1) that includes a picturebox and I draw some lines that change acording to my parameters on it. Then I try to open it as mdichild form. However, I obtain the same drawn lines for every child form, How can I get different instance form in for loop?
I wrote this code main form (MDI parent form) (C# Windows Forms Application)
for (int i = 0; i <= 10; i++)
{
Form1 diagram = new Form1(Group, Paradigm, Method, stimChoise, frequncyChoise);
diagram.MdiParent = this;
diagram.Show();
}
In Form 1, I wrote these
public Form1(string group, string paradigm, string method, string stimChoise, string frequncyChoise)
{
InitializeComponent();
showDiagrams(group, paradigm, method, stimChoise, frequncyChoise);
//this function calls pictureBox1.Paint event that draw lines somewhere
}
Thanks in advance!
modified 12-Mar-16 6:19am.
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Where is the code that draws on the 11 child forms?
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thanks for your quick response, sorry for my inadequate question, I refreshed it
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guest80 wrote: I draw some lines that change acording to my parameters on it
Your code doesn't show any parameters for Form1 which could influence the drawing of the lines. You probably want to pass those as arguments to the constructor of Form1 (for which of course you would have to change the constructor signature accordingly first).
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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thanks for your quick response, sorry for my inadequate question, I refreshed it
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Where do you create the Image that you show in the PictureBox?
While your updated source shows arguments to the constructor of Form1 it appears that all instances of Form1 are created with the same argument-values.
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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Actually In Form1, I drag and drop a picturebox on form and assign an image from property window, the picture always will the same, but lines on it (I use picturebox_Paint event) will be different according to parameters(group, paradigm etc)
this is full code in mainform (MDI form) (the class structure a little bit complicated so I tried to ask my question simple form but I couldn't). I am new in programming so sorry for this.
private void treeView2_NodeMouseDoubleClick(object sender, TreeNodeMouseClickEventArgs e)
{
for (int i = 0; i <= ClairBLL.Classes.LoadNodes.groupNames.Length - 1; i++)
{
for (int y = 0; y <= ClairBLL.Classes.LoadNodes.paradigmNames.Length - 1; y++)
{
for (int m = 0; m <= ClairBLL.Classes.LoadNodes.methodNames.Length - 1; m++)
{
for (int f = 0; f <= ClairBLL.Classes.LoadNodes.frequencyNames.Length - 1; f++)
{
if (treeView2.Nodes[i].Nodes[y].Nodes[0].Nodes[m].Nodes[f].IsSelected == true)
{
Group = treeView2.Nodes[i].Text;
Paradigm = treeView2.Nodes[i].Nodes[y].Text;
stimChoise = treeView2.Nodes[i].Nodes[y].Nodes[0].Text;
Method = treeView2.Nodes[i].Nodes[y].Nodes[0].Nodes[m].Text;
frequncyChoise = treeView2.Nodes[i].Nodes[y].Nodes[0].Nodes[m].Nodes[f].Text;
Form1 diagram = new Form1(Group, Paradigm, Method, stimChoise, frequncyChoise);
diagram.MdiParent = this;
diagram.Show();
}
}
}
}
}
}
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No worries  I guess OriginalGriff hit the spot then with the Image instance being/having been shared among your Form1 instances.
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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Copy the image, so that all the children aren't referring to the same one.
If each child creates it's own copy of the image and loads it into the picturebox, then the images are separate. If they all refer to the same image, then any change to one of them changes the image in them all.
And this does not copy the image:
Image image = myPictureBox.Image;
Image otherImage = image;
myOtherPictureBox.Image = otherImage; All it copies is a reference to the same image, in the same way that if you and your girlfriend share a car, you can refer to it as "my car", "her car", or "our car" - three separate references to the same physical vehicle.
To copy an image, you need to copy the underlying bitmap image data, so use the Image.Clone Method (System.Drawing)[^]
[edit]Typos... [/edit]
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
modified 12-Mar-16 10:04am.
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Okay, I will try this way. I hope it works in this time, Thanks for your advice!
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Guys, I am working in C# Project to provide an security to computer/laptop using bluetooth.
I need to enlist the active bluetooth devices nearby your laptop.... I am unable to code it.
Would anyone please help me to with the coding?
(Note: I am able to list all the bluetooth devices that is active devices & the devices that has already been paired to your laptop, but i am unable to differentiate active bluetooth devices)
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Hi people! Do you know how to use portuguese narrator in C#?
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Member 12386471 wrote: how to use portuguese narrator
What is it?
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any body can help me to make a program using windows Form Application Visual C# ?
Description: I want to hide the secret message into audio file(wav), but before the plaintext inserted into audio ,encrypt/decrypt the plaintext using RSA Algorithm and after that the chipertext inserted into audio using modification LSB phase coding technique.
please help me 
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You say you need help and what you want to do but you don't say what kind of help you need.
Did you take a look at the plethora of articles on steganography and encryption on CodeProject?
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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yes I did, but there is no articles on CodeProject about steganography using LSB and phase coding. I really confused about that.
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Since you want to encrypt the message before embedding it into an audio file, your first step would be to get the encryption and decryption going. For that you'll find plenty of help from articles here.
From my understanding, embedding the cipher in the LSB's of an audio file should be rather trivial provided that you can find an audio library that permits you to manipulate the audio stream in that fashion (I'm no expert there). Have you looked for .NET audio libraries?
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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yes.. that's what I want
I need audio library to manipulate the audio stream, but I can't explain since the begining.
do you know the name of audio libraries on framework.NET (C#) ?
and how I can to use it ?
can you explain to me ?
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As I said, I'm no expert for this. The only .NET audio library I know off the top of my head is this one: NAudio - Home[^]. But I don't know if it allows you to do what you want. You'll have to take a look at it. And if it doesn't, look for alternatives: .net audio library - Google Search[^]
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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thanks for your suggest
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You're welcome!
If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson
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What have you tried?
Where are you stuck?
What help do you need?
We aren't here to do it all for you - we'll help, but you need to show that you are trying as well, not just trying to get us to do your job for you! And so far, all you done is say what you want as a result...
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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no no I'm sorry about that, I don't mean like that. I was try to build application about steganography. It was use AES encryption and LSB technique and I had a problem on the extention of audio. The Cover audio is wav and midi but when I was insert chipertext into audio(midi) there is a problem with the code and so much the noise (the SNR is so weak)
this is my code: AES Encryption steganography cover audio using LSB technique
using System;
using System.Drawing;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.IO;
using System.Text;
using System.Windows.Forms;
using System.Threading;
namespace StegAudio
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void buttonnamafile_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
GetFileName(dlg, textBoxHideFile, false);
}
private void buttontempatfile_Click(object sender, EventArgs e)
{
SaveFileDialog dlg = new SaveFileDialog();
GetFileName(dlg, textBoxDestFile, true);
}
private void GetFileName(FileDialog dialog, TextBox control, bool useFilter)
{
if (useFilter) { dialog.Filter = "Wave Audio (*.wav)|*.wav|MIDI (*.mid)|*.mid";}
if (dialog.ShowDialog(this) == DialogResult.OK)
{
control.Text = dialog.FileName;
}
}
private string GetFileExtension(string filename)
{
return filename.Substring(filename.Length - 3, 3);
}
private void buttoncariaudio_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
GetFileName(dlg, textBoxHideAudio, true);
}
private void buttonfileakhir_Click(object sender, EventArgs e)
{
SaveFileDialog dlg = new SaveFileDialog();
GetFileName(dlg, textBoxExtDest, false);
}
private void buttonsembunyi_Click(object sender, EventArgs e)
{
if(textBoxHideAudio.Text.Length == 0)
{
errorProvider1.SetError(textBoxHideAudio, "You forgot to choose a carrier file.");
}
else if(textBoxPWH.Text.Length == 0)
{
errorProvider1.SetError(textBoxPWH, "You forgot to write a key.");
}
else if(textBoxDestFile.Text.Length == 0)
{
errorProvider1.SetError(textBoxDestFile, "The resulting carrier file must be saved somewhere.");
}
else if (textBoxHideFile.Text.Length == 0)
{
errorProvider1.SetError(textBoxHideFile, "What am I supposed to hide?");
}
else
{
//before we hide the message into the wav file, we must encrypt it first
//in this case, we are using Rijndael encryption
MyEncryptor encryptor = new MyEncryptor(textBoxPWH.Text); //we use the key password as a secret phase
String encryptedMessage = encryptor.Encrypt(GetMessageString());
//reset all the stream first
Stream sourceStream = null;
FileStream destinationStream = null;
WaveStream audioStream = null;
Stream messageStream = GetMessageStream(encryptedMessage); //write the encrypted message into the stream
Stream keyStream = GetKeyStream();
string fileExtension; //fileextension indicating the format of audio file as the carrier of the secret message
fileExtension = GetFileExtension(textBoxHideAudio.Text);
if (fileExtension.Equals("wav"))
{
try
{
//how many samples do we need
long countSampleRequired = WaveUtility.CheckKeyForMessage(keyStream, messageStream.Length);
if (countSampleRequired > Int32.MaxValue)
{
throw new Exception("Message too long, or bad key! This message/key combination requires " + countSampleRequired + " samples, only " + Int32.MaxValue + " samples are allowed.");
}
//use wav file as the carrier
sourceStream = new FileStream(textBoxHideAudio.Text, FileMode.Open);
this.Cursor = Cursors.WaitCursor;
//create empty file for the carrier wave
destinationStream = new FileStream(textBoxDestFile.Text, FileMode.Create);
//copy the carrier file's header
audioStream = new WaveStream(sourceStream, destinationStream);
if (audioStream.Length <= 0)
{
throw new Exception("Invalid WAV file");
}
//are there enough samples in the carrier wave?
if (countSampleRequired > audioStream.CountSamples)
{
String errorReport = "The carrier file is too small for this message and key!\r\n"
+ "Samples available: " + audioStream.CountSamples + "\r\n"
+ "Samples needed: " + countSampleRequired;
throw new Exception(errorReport);
}
//hide message
WaveUtility utility = new WaveUtility(audioStream, destinationStream);
utility.Hide(messageStream, keyStream);
}
catch (Exception ex)
{
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally
{
if (keyStream != null) { keyStream.Close(); }
if (messageStream != null) { messageStream.Close(); }
if (audioStream != null) { audioStream.Close(); }
if (sourceStream != null) { sourceStream.Close(); }
if (destinationStream != null) { destinationStream.Close(); }
this.Cursor = Cursors.Default;
MessageBox.Show("file has success Inserted");
}
}
else if (fileExtension.Equals("mid"))
{
//i'll make it simple, coz the method is slightly different in code than wav. Another reason is that i'm lazy enough not to port the code.
try
{
this.Cursor = Cursors.WaitCursor;
MidiUtility utility = new MidiUtility();
utility.HideMessage(textBoxHideAudio.Text, textBoxDestFile.Text, messageStream, keyStream);
}
catch (Exception ex)
{
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally
{
if (keyStream != null) { keyStream.Close(); }
if (messageStream != null) { messageStream.Close(); }
if (audioStream != null) { audioStream.Close(); } //actually, these two streams aren't needed in this method
if (sourceStream != null) { sourceStream.Close(); } //but let's write them anyway...
if (destinationStream != null) { destinationStream.Close(); }
}
}
}
}
private Stream GetMessageStream()
{
BinaryWriter messageWriter = new BinaryWriter(new MemoryStream());
//open the file to be hidden
FileStream fs = new FileStream(textBoxHideFile.Text, FileMode.Open);
int filelength = (int)fs.Length;
messageWriter.Write(filelength); //save the length of file into binary stream
byte[] buffer = new byte[fs.Length]; //allocate the buffer as big as the file length
fs.Read(buffer, 0, filelength); //read the file into the buffer
messageWriter.Write(buffer); //save the buffer into binary stream
fs.Close(); //close the file when operation finished
messageWriter.Seek(0, SeekOrigin.Begin);
return messageWriter.BaseStream;
}
private Stream GetMessageStream(string message)
{
BinaryWriter messageWriter = new BinaryWriter(new MemoryStream());
messageWriter.Write(message.Length);
messageWriter.Write(Encoding.ASCII.GetBytes(message));
messageWriter.Seek(0, SeekOrigin.Begin);
return messageWriter.BaseStream;
}
private String GetMessageString()
{
FileStream fs = new FileStream(textBoxHideFile.Text, FileMode.Open);
StreamReader rd = new StreamReader(fs);
return rd.ReadToEnd();
}
private Stream GetKeyStream()
{
BinaryWriter keyWriter = new BinaryWriter(new MemoryStream());
//write the password to the binary stream
keyWriter.Write(Encoding.ASCII.GetBytes(textBoxPWH.Text));
keyWriter.Seek(0, SeekOrigin.Begin);
return keyWriter.BaseStream;
}
private void buttonekstract_Click(object sender, EventArgs e)
{
if (textBoxHideAudio.Text.Length == 0)
{
errorProvider1.SetError(textBoxHideAudio, "You forgot to choose a carrier file.");
}
else if (textBoxPWH.Text.Length == 0)
{
errorProvider1.SetError(textBoxPWH, "You forgot to write a key.");
}
else
{
this.Cursor = Cursors.WaitCursor;
FileStream sourceStream = null;
WaveStream audioStream = null;
//create an empty stream to receive the extracted message
MemoryStream messageStream = new MemoryStream();
Stream keyStream = GetKeyStream();
string fileExtension; //fileextension indicating the format of audio file as the carrier of the secret message
fileExtension = GetFileExtension(textBoxHideAudio.Text);
if (fileExtension.Equals("wav"))
{
try
{
//open the carrier file
sourceStream = new FileStream(textBoxHideAudio.Text, FileMode.Open);
audioStream = new WaveStream(sourceStream);
WaveUtility utility = new WaveUtility(audioStream);
//extract the message from the carrier wave
utility.Extract(messageStream, keyStream);
messageStream.Seek(0, SeekOrigin.Begin);
//save result to a file
FileStream fs = new FileStream(textBoxExtDest.Text, FileMode.Create);
//before the result message is saved in the destination file, decrypt it first
MyEncryptor decryptor = new MyEncryptor(textBoxPWH.Text); //we use the key password as a secret phase
StreamReader rd = new StreamReader(messageStream);
String decryptedMessage = decryptor.Decrypt(rd.ReadToEnd());
StreamWriter wr = new StreamWriter(fs);
wr.Write(decryptedMessage);
wr.Flush();
fs.Close();
}
catch (Exception ex)
{
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally
{
if (keyStream != null) { keyStream.Close(); }
if (messageStream != null) { messageStream.Close(); }
if (audioStream != null) { audioStream.Close(); }
if (sourceStream != null) { sourceStream.Close(); }
this.Cursor = Cursors.Default;
MessageBox.Show("Ekstraksi Pesan Telah Selesai");
}
}
else if (fileExtension.Equals("mid"))
{
try
{
MidiUtility utility = new MidiUtility();
utility.ExtractMessage(textBoxHideAudio.Text, null, messageStream, keyStream);
messageStream.Seek(0, SeekOrigin.Begin);
//save result to a file
FileStream fs = new FileStream(textBoxExtDest.Text, FileMode.Create);
//before the result message is saved in the destination file, decrypt it first
MyEncryptor decryptor = new MyEncryptor(textBoxPWH.Text); //we use the key password as a secret phase
StreamReader rd = new StreamReader(messageStream);
String decryptedMessage = decryptor.Decrypt(rd.ReadToEnd());
StreamWriter wr = new StreamWriter(fs);
wr.Write(decryptedMessage);
wr.Flush();
fs.Close();
}
catch (Exception ex)
{
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message);
}
finally
{
if (keyStream != null) { keyStream.Close(); }
if (messageStream != null) { messageStream.Close(); }
if (audioStream != null) { audioStream.Close(); }
if (sourceStream != null) { sourceStream.Close(); }
this.Cursor = Cursors.Default;
MessageBox.Show("Extraction Messages Completed");
}
}
}
}
}
}
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