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passing values within methods in a form

hi, i'm kind of stuck.i have 2 methods.
and i have declared a byte[] abc in menuItemSnap_Click method.
my question is : in another method, how do i get abc that is declare in menuItemSnap_Click method???

Code Snippet
private void menuItemSnap_Click(object sender, EventArgs e)
{
 CameraCaptureDialog camCapture = new CameraCaptureDialog();
 camCapture.InitialDirectory = @"\My Documents\My Pictures";
 camCapture.Mode = CameraCaptureMode.Still;

 if (camCapture.ShowDialog() == DialogResult.OK)
 {
 fileName = camCapture.FileName; // Get filename and create image.
 Show();
 pictureBoxCamera.Image = new Bitmap(fileName);
 pictureBoxCamera.SizeMode = PictureBoxSizeMode.StretchImage;
 camCapture.Dispose();
  
 }

 else
 {
 this.Close();
 } 
FileStream fs = File.OpenRead(camCapture.FileName);
 byte[] abc = new byte[fs.Length];
 fs.Read(bytes, 0, bytes.Length);
}


private void SendQUERY()
{
// i want to get abc which is declared in previous method

}

thanks in advance

rookie_rockie Monday, July 09, 2007 9:13 AM

You will need to declare abc outside of your method like so:

Code Snippet

private byte[] abc = null;

private void menuItemSnap_Click(object sender, EventArgs e)
{
// set abc here
}

private void SendQUERY()
{
if (abc != null)
{
// perform an operation
}
}

UsualDosage Monday, July 09, 2007 12:12 PM

Try this:

Code Snippet

private byte[] abc = null;

private void menuItemSnap_Click(object sender, EventArgs e)
{
CameraCaptureDialog camCapture = new CameraCaptureDialog();
camCapture.InitialDirectory = @"\My Documents\My Pictures";
camCapture.Mode = CameraCaptureMode.Still;

if (camCapture.ShowDialog() == DialogResult.OK)
{
fileName = camCapture.FileName; // Get filename and create image.
Show();
pictureBoxCamera.Image = new Bitmap(fileName);
pictureBoxCamera.SizeMode = PictureBoxSizeMode.StretchImage;
camCapture.Dispose();

}

else
{
this.Close();
}
FileStream fs = File.OpenRead(camCapture.FileName);

abc = new byte[fs.Length]; // removed byte[]

fs.Read(bytes, 0, bytes.Length);
}

private void SendQUERY()
{
// i want to get abc which is declared in previous method
if (abc != null)

{

// do something with abc

}
}

Remember that your variable name is "abc", not "byte[] abc". The "byte[]" declares the variable. So we're moving the declaration out of the event handler, which promotes it to class scope instead of local scope.

Christopher Payne Tuesday, July 10, 2007 10:15 PM

You will need to declare abc outside of your method like so:

Code Snippet

private byte[] abc = null;

private void menuItemSnap_Click(object sender, EventArgs e)
{
// set abc here
}

private void SendQUERY()
{
if (abc != null)
{
// perform an operation
}
}

UsualDosage Monday, July 09, 2007 12:12 PM

hmmm. but byte[] abc needs to get the value of camcapture.filename

rookie_rockie Monday, July 09, 2007 11:17 PM

Right, and since it's declared inside the class (private access modifier), you set it with menuItemSnap_Click. Then, if you reference it later in another method, we check to see if it's null (has not been set yet), and if it's not, we perform some other logic on it.

UsualDosage Tuesday, July 10, 2007 9:35 PM

Try this:

Code Snippet

private byte[] abc = null;