Re: FileNotFoundException error - C# Discussion Boards

26-Mar-09 13:15

I'm getting the above exception where the heading for the Stack Trace is: {"The specified module could not be found. (Exception from HRESULT: 0x8007007E)":null}
This is a windows application using c#.net 2008, and the code is as follows:

private void formEmergePatDB_Load(object sender, EventArgs e)
{
// more code here ........
populate_Images(0, 19); //FileNotFoundException error on this line
{

public void populate_Images(int startImg, int endImg)
{
int img = 0;
// more code here ........
{

Before the populate_Images error the code performs many other similar requests with no problem?
I can't imagine why it can't find the module, it is there and I am sending the appropriate arguments it asks for. Help Anyone!!!

T_Teef26-Mar-09 13:26

T_Teef

26-Mar-09 13:26

i think its a memory error not sure. Wink | ;)

Adam Maras26-Mar-09 13:37

Adam Maras

26-Mar-09 13:37

Can you paste us the contents of your populate_Images function?

Luc Pattyn26-Mar-09 15:34

26-Mar-09 15:34

Hi,

lacking some of the essential information, here is a wild guess: populate_Images() is called successfully, but it contains either a reference to native code using P/Invoke, and some method is not found, or, more likely, it attempts to locate images from external modules (say DLL files) and one of them cannot be found. Check for a typo. Or show us the code; if you do PLEASE use the "code block" button below the edit window.

Smile | :)

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Member 462208927-Mar-09 5:28

27-Mar-09 5:28

Thanks Luc for your help with this, and everyone else that is trying. Thing is, I have a break point on the 1st line of populate_Images routine, which is a simple var declaration, and that code never fires. The error actually happens on the calling line populate_Images(0, 19);

Is it possible to error before it calls the routine? You are correct Luc, the routine uses ImageMagick to render the .pcx images onto 23 or so imageBoxes per page. Code is too much to post here, but here is a portion that uses imageMagick:

public void populate_Images(int startImg, int endImg)
       {
           int img = 0;    //BREAK POINT HERE : NEVER BREAKS

   etc, etc..............................

           //add images into ImageMagick
           for (intI = startImg; intI <= endImg; intI++)
           {
               var imageList = new ImageMagickNET.ImageList();     //THIS LINE HAS GIVEN ME TROUBLE THRU THE ENTIRE PROJECT

               img += 1;
                   //driving from FileListBox
                   string strIm1 = "\\\\swd4fs\\graphics\\" + (commonClass.parseIt(FileListBox.Path.ToString(), "Release")) + "\\";
                   string strIm2 = FileListBox.SelectedIndex.ToString();
                   imageList.ReadImages(strIm1 + strIm2);


               //render 1 images at a time & display if available
               foreach (ImageMagickNET.Image image in imageList)
               {
                   switch (img)
                   {
                       case 1:
                           PictureBox1.Image = image.ToBitmap();
                           break;
                       case 2:
                           PictureBox2.Image = image.ToBitmap();
                           break;
                       case 3:
                           PictureBox3.Image = image.ToBitmap();
                           break;

           etc, etc..............................

                   }
                   break;
               }
   }

imgaMagick works great in vs2005, been have lots of trouble integrating into vs2008.
Thanks for your help

Luc Pattyn27-Mar-09 5:56

27-Mar-09 5:56

Hi,

Member 4622089 wrote:
THIS LINE HAS GIVEN ME TROUBLE THRU THE ENTIRE PROJECT

tells me you are doing something wrong and have chosen to live with it.
you should solve this.

Member 4622089 wrote:
BREAK POINT HERE : NEVER BREAKS

I don't trust breakpoints that much. I prefer adding log statements to see the program evolving.
the simplest log method is Console.WriteLine(string);
If you don't need img right away the compiler might have moved it downwards.

You are omitting to much code for us to help you.
I suggest you start by adding a try{...} catch(Exception exc) {Console.WriteLine(exc.ToString());} first at the caller to populate_Images as well as inside populate_Images.

Is it the first call to populate_Images that fails? is any image processed correctly before it fails?
does it fail consistently?

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Member 462208927-Mar-09 6:19

27-Mar-09 6:19

Luc, your assumptions are incorrect. I have not chosen to live with it, I am currently attempting to get it to work. I need to render .pcx images and don't have another way of doing it in .NET, so I found imageMagick, which worked great in 2005 for over a year, and thought I'd be able to get it to work in 2008...it is what I am trying to solve.
Breakpoints never gave me trouble, ever... the code never hits the module, it errors on it's call, therefore I'm not sure if it is imageMagick or something else.
The code I'm omitting is just setting variables as flags, checking other flags for setting a tab panel control, clearing the imageBoxes, and redering 23 images instead of the few I actually posted. The code simply never gets to this routine at all. It is the populate_Images call that fails, consistently and it is the first call to this routine (which at this point is done on my initial page load). No images are rendered at this point, that is what the populate_Images routine does.
Thanks for all your help

Luc Pattyn27-Mar-09 6:53

27-Mar-09 6:53

OK,

1.
something cannot be right. populate_Images() is a regular C# method, it is part of your code, so it does not need another file and it can't be missing or not be found. It can only go wrong inside populate_Images(). So I would add a log statement inside and see it gets executed.
BTW what where the results from the try-catch?

2.
ImageMagick is a library and optionally also an ActiveX component isn't it?
When you install it, there are several checkboxes, one of them makes it available as an ActiveX component, did you check it during installation?

3.
Is GetList() the first call into ImageMagick? Doesn't the library need some initialization? What is inside the ImageMagick constructor? Is the constructor your code, or is there a .NET wrapper available publicly?

4.
Maybe something went wrong with its referencing, so I suggest you:
- remove all ImageMagick stuff from your project (and from the GAC if you use it)
- comment out the calls to it
- re-add a reference to it
- retype the statements using IM while watchinh intellisense works for it.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Member 462208927-Mar-09 11:50

27-Mar-09 11:50

Thanks again Luc.

1. I added a simple log file write to the module as well as wrapped the entire module in a Try...catch error handler, per your suggestion. On the catch I placed a simple Console.WriteLine(ex.Message); None of this code ever fires, the application stops with the original error at populate_Images(0,19);

2. my install of IM seems different from what you describe. I got the code from this site at:

http://www.codeproject.com/KB/dotnet/ImageMagick_in_VBNET.aspx

The instructions are to unzip 3 downloads onto a single folder in a specific order, than to run the install.bat (which is not included, though there are 3 others clean.bat, install-full.bat and install-safe.bat), so I ran the install-full.bat and opened the solution. ran it after copying the missing .dll to the bin/releaseq8 folder and chose the activex control to run. Took the compiled DLL and placed it along with the .pdb library for reference into my vs2008 folder and referenced them in the applications. Same I did on vs2005 the 1st time and it was great.

3. GetList() is not the 1st thing I do, on the:

public partial class formEmergePatDB : Form

before the form load I have the following code (not sure I need this, following the working vs2008):

public ImageMagickNET.ImageList imageList;

4. I will try to remove all IM references, but I don't see how that will change anything since the code never fires at all. Then I will re-compile and re-reference the dll and library and not sure what else, all of this seems like shots in the dark.

Thank you so much for your time and patience Luc

Luc Pattyn27-Mar-09 19:16

27-Mar-09 19:16

Hi,

My suggestion about removing, then reinstalling the references to ImageMagick is based on the possibility you managed to build, then something happened to IM so the references got broken. Hence, the suggestion to re-establish references and rebuild.

I happen to use a native (VB6) application that calls on ImageMagick (native code), so I know how to install that one. However I was unaware of any .NET version, or .NET wrapper, or the article you referred to. Thanks for the info though, it will be useful to me some day.
The article has its own blog, you might want and post there, so the author or someone else might come up with something.

I looked at the batch files, the full install needs two .reg files, did you find those? I didn't. Without them, the necessary registry entries will not be present; and with them, it may fail on Vista, because at last Vista implements some registry protection. Are you using Vista?

Final tought: since there are lots of DLLs involved, one probably calling all the others, the folder holding them might need to appear in the Windows PATH environment variable.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Can you read session status from a windows service?

S. Senthil Kumar27-Mar-09 7:06

S. Senthil Kumar

27-Mar-09 7:06

Here's what I would do.

If the assembly containing the faulting code is unmanaged/mixed mode, I'd try opening it in Depends[^] and see if there are any missing dependencies.

If it is managed, I'd try enabling Fusion logging [^] and checking out the exception stack trace for the missing dependency.

Regards
Senthil [MVP - Visual C#]
_____________________________
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Beyondard26-Mar-09 11:41

Beyondard

26-Mar-09 11:41

Hello everyone,

I am writing a service that needs to do different things depending on the session state, I am currently handling the OnSessionChange event, but I'm running into a little bit of trouble:

if I turn on the computer and log in right away, the service has not started by the time I log in and that first log in is not registered in my service.

My question is: is there a way to read if there is a user logged in and what state the session is in (logged in, locked, remote logged in, etc) that I can check during the OnStart event?

Editable Combobox

OldSchoolToC#26-Mar-09 11:14

OldSchoolToC#

26-Mar-09 11:14

I want to use an editable combobox. I set the DropDownStyle as DropDown. Now I'm unsure what event to use to collect the value of whatever the user inputs. I've tried comboBox1_TextChanged and comboBox1_TextUpdate, but they are triggered as soon as the first character is typed. I tried comboBox1_SelectionChangeCommitted, which wasn't triggered at all with the edit.

I'm sure this must be something simple that I'm missing.

Thanks!

J$26-Mar-09 13:34

26-Mar-09 13:34

If you're trying to get the Text that was typed into a combobox all you need to do is read the comboBox.Text property.

OldSchoolToC#26-Mar-09 14:07

OldSchoolToC#

26-Mar-09 14:07

Actually, I am trying to find an event that will tell me that someone has finished entering text, so that I can then read the comboBox.Text property. The combobox_TextChanged event fired immediately after the first character is input. I'm look for an event that will recognize when the input is committed. I'm not sure how combobox_TextUpdate is different from combobox_TextChanged.

Luc Pattyn26-Mar-09 15:38

26-Mar-09 15:38

Hi,

OldSchoolToC# wrote:
I'm not sure how combobox_TextUpdate is different from combobox_TextChanged.

that detail is hidden in the documentation.

OldSchoolToC# wrote:
someone has finished entering text

how could anyone tell? do you do something special when entering the last character? Your app won't read your mind, so either you implement a time-out mechanism (bad idea), or you make the user do something special, like clicking a button to start acting on the new information. How does the find dialog work in MS Word or Windows Explorer? it has a TextBox and a "Find" button.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

dybs26-Mar-09 16:47

dybs

26-Mar-09 16:47

What about using the LostFocus and TextChanged event (I think that's it)? You could set a flag in the TextChanged event, and if that flag is true on LostFocus, then your change is committed.

Or, use OnKeyPress and check that the Enter key was pressed.

Dybs

OldSchoolToC#26-Mar-09 16:54

OldSchoolToC#

26-Mar-09 16:54

Thanks! Your suggestion is very helpful. I think I have a good idea now of what I need to do.

Dave Kreskowiak26-Mar-09 18:10

Dave Kreskowiak

26-Mar-09 18:10

And what if the use want's to cancel and not use the data typed into the Combo?? His idea is not a good one... Clicking on a Cancel button will cause the LostFocus event to fire on the Combo first.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

dybs27-Mar-09 15:43

dybs

27-Mar-09 15:43

Good point, I didn't think about cancelling the change. In that case, forget about LostFocus and just use OnKeyPress and require the user to press Enter or Tab to commit the text. I think for a lot of people it's just habit anyway to press Enter or Tab when you're done entering text for a field.

Dybs