Re: FileNotFoundException on file that exists! - C# Discussion Boards

Christian Graus24-Sep-09 0:42

24-Sep-09 0:42

Your best bet I would think, if it's an OCX, is to import it ( that means it's a COM object, right ). Then you will get a wrapper class generated for you.

The alternative is to go to www.pinvoke.net[^] and look for examples there, unless someone other than me can give a more definitive answer.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Re: Calling method from C++ ocx

Luc Pattyn24-Sep-09 0:46

Luc Pattyn

24-Sep-09 0:46

Hi,

you can't marshal a VARIANT, it isn't even supported by the CLR.
The only thing you could do is prototype it as an IntPtr (and ignore it, as you don't have any other method that can digest it).

Smile | :)

Luc Pattyn

Local announcement (Antwerp region): Lange Wapper? Neen!

Re: Calling method from C++ ocx [modified]

Hristo-Bojilov24-Sep-09 0:54

Hristo-Bojilov

24-Sep-09 0:54

I think you should marshal VARIANT type as System.IntPtr and next use Marshal.GetObjectForNativeVariant to convert it to valid CLR object.

[EDIT]
You could also write your own custom marshaler to provide for automatic marshaling from native to managed objects and back.See this MS sample.

Life is a stage and we are all actors!

modified on Thursday, September 24, 2009 7:10 AM

Control.BeginInvoke()

kmb8923-Sep-09 23:53

kmb89

23-Sep-09 23:53

I use the following code to operate my treeview asynchronously.

IAsyncResult result = sourceTree.BeginInvoke(l_CreateTreeNodes, new object[] { sourcenode.Nodes[stables],destinationnode.Nodes[dtables],mSourceInfo.TableNames,mDestinationInfo.TableNames});

While(!result.IsCompleted){}

But asynchronous operation is not completed and 'result.IsCompleted" property is always 'false'.

So, the operation isn't existed from while loop.
I don't know why 'IsCompleted' property is always false.

Confused | :confused:

Re: Control.BeginInvoke()

N a v a n e e t h24-Sep-09 0:05

N a v a n e e t h

24-Sep-09 0:05

If you need blocking calls, why to use BeginInvoke? Use Invoke instead. It is synchronous and waits until the message is processed.

Navaneeth

How to use google | Ask smart questions

Re: Control.BeginInvoke()

PIEBALDconsult24-Sep-09 18:10

PIEBALDconsult

24-Sep-09 18:10

Not that it matters, but why {} rather than ; ?

FileNotFoundException on file that exists!

Thomas ST23-Sep-09 23:50

Thomas ST

23-Sep-09 23:50

Hi, I am running this code:

<br />
string fullFilename = "\\\\server\\share\\DL_JP_462153474_461535959_attest.JPG.pdf";<br />
byte[] bytes = File.ReadAllBytes(fullFilename);

and get this exception:

FileNotFoundException
"Could not find file '\\\\server\\share\\DL_JP_462153474_461535959_attest.JPG.pdf'."

The only problem is that the file does actually exist! Also, it works on files with shorter filenames in the same folder. For example:
\\\\server\\share\\DL_JP_448856461_461530268_462153469.pdf
Does anyone know what this is all about? Confused | :confused:

Re: FileNotFoundException on file that exists!

Keith Barrow24-Sep-09 0:35

Keith Barrow

24-Sep-09 0:35

It's *highly unlikely* that System.IO.File is wrong, but more likey that the path provided is incorrect in some way.

try replacing this:

string fullFilename = "\\\\server\\share\\DL_JP_462153474_461535959_attest.JPG.pdf";

with this

string fullFilename = @"\\server\share\DL_JP_462153474_461535959_attest.JPG.pdf";

If you use the string with the @ symbol rather than your escaped version, you can copy the contents of the string you set fullFilename and perform some manual checks( such as pasting the path\\server\share\DL_JP_462153474_461535959_attest.JPG.pdf into explorer).

CCC solved so far: 2 (including a Hard One!)

Re: FileNotFoundException on file that exists! [solved]

Thomas ST24-Sep-09 1:15

Thomas ST

24-Sep-09 1:15

So that is what the @ is for Smile | :)

Thank you for your answer, but I have to admit that I screwed up, and the file actually doesn't exist D'Oh! | :doh:

I am working with some testdata, and someone placed an error there (possibly on purpose?) Hmmm | :|

That is a lot of hours wasted... Frown | :(

the difference_:
DL_JP_462153474_461535959_attest.JPG.pdf
DL_JP_462143474_461535959_attest.JPG.pdf

Re: FileNotFoundException on file that exists! [solved]

Keith Barrow24-Sep-09 1:34

Keith Barrow

24-Sep-09 1:34

Thomas ST wrote:
That is a lot of hours wasted...

We've all done this sort of thing!

CCC solved so far: 2 (including a Hard One!)

Serializing an inhertid class

tvbarnard23-Sep-09 23:46

tvbarnard

23-Sep-09 23:46

Good day

I am trying to serialize/deserialize a class (for the first time), and the serialization works fine, but as soon as I try to deserialize it, it gives me the exception:

System.Reflection.TargetInvocationException was unhandled
  Message="Exception has been thrown by the target of an invocation."
  Source="mscorlib"

  InnerException: System.Runtime.Serialization.SerializationException
       Message="Member '' was not found."
       Source="mscorlib"
       at Trainer.BoostedClassifier..ctor(SerializationInfo info, StreamingContext context)

The class I'm serializing contains a List<int> type, could this be the source of the error?

I would appreciate any ideas to what this exception might be hinting at. (let me know if more info is needed)

tvb

Re: Serializing an inhertid class

tvbarnard24-Sep-09 0:00

tvbarnard

24-Sep-09 0:00

Sorry, I forgot to mention why my heading is called serializing an inherited class;

My class I am serializing also contains a list of my own object type (List<Object>), but the objects themselves are inherited instantiations.

In other words, I'm serializing:

MainClass <-- being serialized. Which contains,

List<Object> <-- where an the objects are of type,

InhertiedObj : Object

If that makes any sense?

I would post the code, but it is unfortunately very long.

tvb

Create a word document without using Interop object [modified]

Swetha Srinivasan23-Sep-09 22:38

Swetha Srinivasan

23-Sep-09 22:38

Hi Is it possible to create a word document without using third party libraries and the interop object in c
# programatically??

modified on Thursday, September 24, 2009 5:02 AM

Re: Create a word document without using Interop object

stancrm23-Sep-09 22:42

stancrm

23-Sep-09 22:42

Yes, just write your own codes. Here is the file format :

http://www.microsoft.com/interop/docs/OfficeBinaryFormats.mspx[^]

Create new form

tamir90123-Sep-09 22:14

tamir901

23-Sep-09 22:14

Hi,

I have a form that gets data from DB,
i created an event when the form deactivate the current form gets this.Hide() and a new form is open.

my problem if how i can reopen the first window?
if i write-

FirstWindow frmFirst = new FirstWindow();
frmFirst.Show();

a new form is open, but not the first form (the one that i turn to Hide()).

How can i solve this????
Frown | :(

Re: Create new form

OriginalGriff23-Sep-09 22:27

OriginalGriff

23-Sep-09 22:27

You will have to either
1) Keep a reference to the original form and pass it to the new form when you create it, and before you hid the original.
or
2) hook into an event from the second form to the original form which causes the original to re-display itself.

The second is better practice as it doesn't require form2 to know anything outside itself - it just throws an "I'm done" event.

Niether is too complex, the second is a few extra lines of code.

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Re: Create new form

tamir90123-Sep-09 22:29

tamir901

23-Sep-09 22:29

answer:
main Form

this.Hide();
            MiniForm frmMini = new MiniForm( sender);
            frmMini.Show();
            frmMini.TopMost = true;

SubForm:

private void MainForm_Deactivate(object sender, EventArgs e)
        {
                        this.Hide();
            MiniForm frmMini = new MiniForm( sender);
            frmMini.Show();
            frmMini.TopMost = true;
            
        }
private void MiniForm_Click(object sender, EventArgs e)
        {
            this.Close();

            frmMain.Show();

        }

Problem related to grid

lalit1423-Sep-09 21:03

lalit14

23-Sep-09 21:03

I have a grid and some textboxes

Grid have data from database and i added a EDIT button with fields.

The thing i want is---->

Whenever i click on edit button the data associated with it will get display in textbox.

I hope u all got what i want.

Thanks in advance.

Re: Problem related to grid

OriginalGriff23-Sep-09 21:56

OriginalGriff

23-Sep-09 21:56

So whats the problem?
In the button click event, get the info from the selected cell of the grid, and put it in the text box.
Which bit are you having difficulty with? What have you tried?

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Re: Problem related to grid

lalit1423-Sep-09 23:23

lalit14

23-Sep-09 23:23

Nothing clicking in my mind, what code to write in it?

Re: Problem related to grid

OriginalGriff24-Sep-09 0:29

OriginalGriff

24-Sep-09 0:29

lalit14 wrote:
Nothing clicking in my mind, what code to write in it?

Write a button click event handler, hooked to your button.
In the handler, write the code to:
1) Find the selected cell in your grid.
2) Get the text from the cell.
3) Put the text into your TextBox.

At least two of these are simple, one-line-of-code-at-the-most bits of software.

What have you tried?

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Re: Problem related to grid

lalit1424-Sep-09 19:54

lalit14

24-Sep-09 19:54

Thanks dude

its working....!!

Re: Problem related to grid

OriginalGriff25-Sep-09 0:07

OriginalGriff

25-Sep-09 0:07

You are welcome! Glad to hear it.

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Re: Problem related to grid

Vimalsoft(Pty) Ltd23-Sep-09 22:23

Vimalsoft(Pty) Ltd

23-Sep-09 22:23

OriginalGriff is Correct, if you want to edit the gridview in ASP.net, you must enable the appropriate properties that will show you the edit,Delete and update per row and if you click on Edit,you do not need to write a code to do that, ASP.NET already will do it for you. The Values will be Presented in a Textbox , and in edit more for you to edit and the Update and Cancel Button will be available options for you.

Vuyiswa Maseko,

Few companies that installed computers to reduce the employment of clerks have realized their expectations.... They now need more and more expensive clerks even though they call them "Developers" or "Programmers."

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
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vuyiswa@its.co.za
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i need some help

Mohamed El-Wehishy23-Sep-09 20:20

Mohamed El-Wehishy

23-Sep-09 20:20

hi
i have two forms
i want after 3 seconds the first form is hiden and the second one is appeared
sorry for that silly question but the first form has user control that playing a movie
i trying to use the usually code to hide the first one
but
it is not disappeared and the second is appeared
thanks very much

Mohamed

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