• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 325
  • Last Modified:

Process Not Releasing

My coworker has an application that he is working on that views dicom images using the ezdicom activex tool.  He added functionality to print the images into the application.  The only way he could figure to go about it was to use a function in the activex tool that writes the image to a file and then say graphics.drawimage from that file.  It works fine and prints, but the problem is that in order to become efficient, after printing the image he tries to delete the file that was generated from the image and gets an error saying that the file could not be accessed because it was in use by another process.  For the life of us, we cannot figure out what is causing this error, because if we change the image and click print again, causing it to write a new image to the same file, it works with not problem.  It is just when it tries to delete the file.  Any ideas what could be causing this????????????

Thanks,
Kendal
0
gvector1
Asked:
gvector1
1 Solution
 
sonicblisCommented:
Can you post the code you are using to write the image to the directory?  It is likely that there is a lock placed by the object opening the file for writing that you are not explicitly releasing, similar to when you create a text file for writing with a TextWriter and don't call the .Close() method.
0
 
gvector1Author Commented:
It is an activex control that writes the file.  There is no explicit close methods within the control to release the file.  Here is all of the printing code that we are using.

            private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
            {
                  double factor=0;
//                  get_the_imagesize(width, height);
                  the_ezdicom.DCMsaveToFile = @"c:\emr\tempdcm.jpg";
//                  // Draw a picture.
                  if (Convert.ToInt32(width)>1000)
                  {
//                        if (Convert.ToInt32(width) == 2048)
//                              factor = .415;
//                        else if (Convert.ToInt32(width) == 2500)
//                              factor = .34;
                        factor = .34;
                        double pwidth = (factor * Convert.ToInt32(width));
                        double pheight = (factor * Convert.ToInt32(height));
                        e.Graphics.DrawImage(Image.FromFile(@"c:\emr\tempdcm.jpg"),0,0,Convert.ToInt32(pwidth), Convert.ToInt32(pheight));
                  }
                  else
                  {
                        e.Graphics.DrawImage(Image.FromFile(@"c:\emr\tempdcm.jpg"),75,75,Convert.ToInt32(width.Trim()),Convert.ToInt32(height.Trim()));
                  }
//                  Indicate that this is the last page to print.
                  e.HasMorePages = false;

            }

            private void menuItem2_Click(object sender, System.EventArgs e)
            {
                  PrintDialog printDialog1 = new PrintDialog();
                  printDialog1.Document = printDocument1;
                  DialogResult result = printDialog1.ShowDialog();
                  
                  if (result == DialogResult.OK)
                  {
                        printDocument1.Print();
                  }

            }

All of this code currently works, but if I add a line (File.Delete("C:\emr\tempecm.jpg")) at the end of menuItem2_click() event, I get the in use by other process error.  Again, the control is an EZDicom Control.  What do you think?

Thanks,
Kendal
0
 
gillgatesCommented:
You could try setting the variable to null...

private void menuItem2_Click(object sender, System.EventArgs e)
{
       PrintDialog printDialog1 = new PrintDialog();
       printDialog1.Document = printDocument1;
       DialogResult result = printDialog1.ShowDialog();
               
       if (result == DialogResult.OK)
       {
             printDocument1.Print();
       }
       the_ezdicom = null;
       File.Delete("C:\emr\tempecm.jpg");
}

0
Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
gvector1Author Commented:
I don't believe we will be able to do that as it is an activex control that is also displaying the image and accepting user interaction.  Any other suggestions????

Thanks,
Kendal
0
 
KelmenCommented:
We faced similar problem with COM object.

Maybe you should try the GC.Collect(), to force a resourses release after you done with your printing.

Our experience is with CDONTS stuff, have to use the GC.Collect() twice! And even sometime it also doesn't work (on rare occasion). The requirement changed at later so we abandon it.
0
 
gvector1Author Commented:
I cannot believe it.  It WORKED!!!!!  Thanks a million.  So do you think it was just the dicom control not releasing the file after using it????  The points are yours.

Thanks again,
Kendal
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

The 14th Annual Expert Award Winners

The results are in! Meet the top members of our 2017 Expert Awards. Congratulations to all who qualified!

Tackle projects and never again get stuck behind a technical roadblock.
Join Now