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Thanks

redfish3420-Dec-05 22:28

redfish34

20-Dec-05 22:28

Thanks for the confirmation. It looks like if i want specific information from the StackTrack, i will have to parse the StackTrace string with RegEx. No biggie, just wanted to make sure i was not overlooking something.

Problem Calling and Creating COM Objects

Soaring Eagle14-Dec-05 17:13

Soaring Eagle

14-Dec-05 17:13

Hi there,

What I want to do is to build a COM Server in C# and call it
from a VC++ Client(visual studio 6).

An example of that is found on :
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vcwlkcominteroppart2cservertutorial.asp

However it's not detailed.The sample example explained provided
on that website doesn't open in the first place so that I can
track it down.

Whenever I try to use regasm or cl that are mentioned to be
command prompt commands I get that no such internal or external
command exist.

Here's what I did:
1-I created a C# project of type "Class library"
2-I have pasted the provided C# Server code in it
3-I set the "register for COM Interop" in the build properties
to "true"
4-I built the project,it was built successfully with no errors
5-I started without debugging but ofcourse it wont' run

In another article I found,it said that before step 4,I should
create a strong name for the assembly using the utitlity sn.exe
but I can't figure out how to use it.
http://www.codeproject.com/csharp/COM_Object_in_C_.asp

As for the C++ client, I just created a new C++ file and pasted
the code.After that I am unable to run the given commands
provided to know what to do next.

Can you please help me out?I am really stuck.

Cheers,
Eagle

Xml Splitter in C#

Markus35014-Dec-05 16:52

Markus350

14-Dec-05 16:52

Hello all,
I'm new to c# and I'm having a heck of time trying to figure out this problem. What I'd like to do is take an xml document that has repeating elements, break it up, and output several xml documents based on the split.
eg...take this
"root"
"whatever"
"something" blah "/something"
"else" blah blah "/else"
"/whatever"
"whatever"
"something" blah2 "/something"
"else" blah2 blah2 "/else"
"/whatever"
"whatever"
"something" blah3 "/something"
"else" blah3 blah3 "/else"
"/whatever"
"/root"
and output three xml separate documents, each containing "root", "whatever", "something", and "else".
I've tried a few things using xmltextreader and writer, but nothing has worked thus far. I'd image I need to store the original document in memory somehow and go forward from there...but that's the thing, I'm not sure how to do this. Any help will be greatly appreciated. Thanks.
ps i used "" rather than tags because i wasn't sure how to get the xml syntax how to appear on the page Blush | :O

-- modified at 22:53 Wednesday 14th December, 2005

(Urgent) switch between tabpages of a tabcontrol by CTrl+tab

LongNguyen14-Dec-05 16:07

LongNguyen

14-Dec-05 16:07

I put a tabcontrol into my form, there are 3 tabpages and I want my user can switch between tabpages by pressing CTrl+tab. How to do this? Confused | :confused:

Note:my project has a mdiform, when I click menu, the form containing tabcontrol appear but if I press ctrl-tab, nothing happens. Cry | :((

I create new project with single form, add a tabcontrol into my form, when pressing Ctrl-tab everything is OK. Why?
Regards.

Change Time and TimeZone Programatically

denpsia14-Dec-05 15:41

denpsia

14-Dec-05 15:41

Hi everybody,

What is difference between a local time and a system time, Correct if I am wrong, system time is time of the system server where your computer is connected. So, if I would change system time I need to change the tme on the server. Right? How would you set(change the local time programatically? Also, using DateTime.UtcNow is to get system time? How to change the system time programatically? How to get and set(change) Time Zone? The System is a remote server and can be access through internet. How to cahnge the time at server?

The situation is this, if the application is to be used by say user from another country, they have their own local time and Time Zone Info, and their own system (server) time. I like these to be configurable. I know that to change timezone I need a class and method inside the System.Globalization. Can you help narrow it down or pinpoint it for setting and getting time zone? Also, how to get a list of Time Zone to be displayed in a Combo Box? Is there a method for this?

I am looking a direct method in setting or getting these values.

denpsia

Handle Picturebox in C# ???

Abubakarsb14-Dec-05 15:04

Abubakarsb

14-Dec-05 15:04

Hello !

I am developing a Desktop base not Web base application in C# by using Visual Studio 2003 I want to show images in one column of datagrid against each Product Id by using Picturebox which is coming from Database I also want to raise events against the click and mouseover events of each picturebox Moreover I want to edit images too in Database by using "OpenFileDialog" in Datagrid plz tell me how can i do that????

Please also intimate me on my email address "abubakar.malik@gmail.com"

Regards,

AbuBakar

Copying more than 1 textbox field to Clipboard

apoc50314-Dec-05 13:19

apoc503

14-Dec-05 13:19

Is there a way to copy more than 1 textbox to the clipboard? I tried doing individual statements for each textbox but the last one is the only one that shows up.

textBox1.SelectAll();<br />
Clipboard.SetDataObject(textBox11.SelectedText,true);<br />
<br />
textBox2.SelectAll();<br />
Clipboard.SetDataObject(textBox2.SelectedText, true);

I need to copy the contents of 13 textboxes to the clipboard and somehow (if possible)paste them onto a Word document with a line break inbetween each field.

Any suggestions?
Thanks!

Apoc

Re: Copying more than 1 textbox field to Clipboard

enjoycrack14-Dec-05 14:33

enjoycrack

14-Dec-05 14:33

How about this...

var content = textbox1.value + textbox2.value+...<br />
clipboard.setDataObject(conten,true);

Hope you get the idea...

<< >>

Re: Copying more than 1 textbox field to Clipboard

apoc50314-Dec-05 14:46

apoc503

14-Dec-05 14:46

You rock!

Thanks so much!

Apoc

.NET 2003 after C# Express Install

Stephen McAllister14-Dec-05 9:52

Stephen McAllister

14-Dec-05 9:52

Hi,

After installing C# Express Install I have a COM error in an application.

Additional information: COM object with CLSID {10020200-E260-11CF-AE68-00AA004A34D5} is either not valid or not registered.

The object is the SQLDMO Interop.

How can I register the dll. I tried regsvr32 but a dll entry point error occurs.

Thanks for any help.

Stephen

Re: .NET 2003 after C# Express Install

Gulfraz Khan16-Dec-05 6:36

Gulfraz Khan

16-Dec-05 6:36

I think the sqldmo.dll is replaced with a new sqldmo.dll (came with Express edition)
try finding it from another machine and copy it to System32 folder than
use regsvr32

i hope it works!

Re: .NET 2003 after C# Express Install

Stephen McAllister16-Dec-05 12:14

Stephen McAllister

16-Dec-05 12:14

Thanks.

I uninstalled and reinstalled and it is all good now. Teaches me for installing it when I have other work to do.

Should of known better.

Threading question

Steve Messer14-Dec-05 9:09

Steve Messer

14-Dec-05 9:09

I am trying to figure out how to sent an event or set a callback when a thread finishes its work.

Lets say that I have 3 functions called:

1) GetData1()  // Gets a list of items ( id, name, age )
2) GetData2()  // Gets an item where id = an id from the list from GetData1() ( num, color, etc )
3) GetData3()  // Gets an item where color = color from the list in from GetData2()

Each function depends on the results of the prior function in order to be able to do its work.

These threads cannot block the main application thread.However, GetData1() may block GetData2() and GetData3()
and GetData2() can block GetData3()

Each of these worker threads make calls to and XML server, and when a given thread finishes I need to start the next one.

The threads can take a long time to complete their task, meaning minutes and not milliseconds etc.

How can I know when a previous thread has finsihed?

Thanks

-- modified at 15:10 Wednesday 14th December, 2005

Re: Threading question

Judah Gabriel Himango14-Dec-05 9:19

Judah Gabriel Himango

14-Dec-05 9:19

You can pass a delegate into the various BeginInvoke methods to have a function execute when the thread is done. For example,

ThreadStart method1 = GetData1();
method1.BeginInvoke(myCallbackFunction, null);

...

void MyCallbackFunction(IAsyncResult result)
{
   // GetData1 is done!
}

Does this help? Or am I not understanding your problem?

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Bought a House!
Judah Himango

Re: Threading question

WillemM14-Dec-05 9:23

WillemM

14-Dec-05 9:23

Hehe, stupid of me this is also a solution.

WM.

What about weapons of mass-construction?

Re: Threading question

Steve Messer14-Dec-05 9:33

Steve Messer

14-Dec-05 9:33

This seems to be what I am looking for.

The snipit you provided doesn't compile, but I can look up the syntax.

Re: Threading question

Judah Gabriel Himango14-Dec-05 9:38

Judah Gabriel Himango

14-Dec-05 9:38

It should compile under .NET 2.0 syntax (where delegates can be inferred from the method passed). If you're not using a C# 2.0 compiler, you'll need to explicitly create the delegates:

ThreadStart method1 = new ThreadStart(GetData1);
AsyncCallback callback = new AsyncCallback(myCallbackFunction);
method1.BeginInvoke(callback, null);

...

void MyCallbackFunction(IAsyncResult result)
{
   // GetData1 is done!
}

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Bought a House!
Judah Himango

-- modified at 15:40 Wednesday 14th December, 2005

Re: Threading question

Steve Messer14-Dec-05 9:51

Steve Messer

14-Dec-05 9:51

Thanks that did the trick.

Sorry, but I am still in the stone ages using .net 1.1 and Visual Studio 2003 Smile | :)

Thanks again

Re: Threading question

Steve Messer14-Dec-05 11:09

Steve Messer

14-Dec-05 11:09

Well, it compiles but it doesn't ever call the callback function

Here is my callback function

void MyCallbackFunction(IAsyncResult result)
{   
    // GetData1 is done!}
    if( result.IsCompleted )
       MessageBox.Show( "Callback triggered");
}

Here is how I am calling it

ThreadStart method1 = new ThreadStart(RequestVehicles);
AsyncCallback callback = new AsyncCallback(MyCallbackFunction);
method1.BeginInvoke(callback, null);

Thread tThread = new Thread( method1 );
tThread.IsBackground = true;
tThread.Start();

Have I done something wrong?

-- modified at 17:19 Wednesday 14th December, 2005

Re: Threading question

Judah Gabriel Himango14-Dec-05 11:58

Judah Gabriel Himango

14-Dec-05 11:58

In that code snippet, you're calling RequestVehicles 2 times: once when you call method1.BeginInvoke method, and again when you explicitly create your Thread and call .Start on the thread. Just remove that explicit thread creation, it's redundant. Your code should look like:

ThreadStart method1 = new ThreadStart(RequestVehicles);
AsyncCallback callback = new AsyncCallback(MyCallbackFunction);
method1.BeginInvoke(callback, null);

void MyCallbackFunction(IAsyncResult result)
{   
    // GetData1 is done!}
    if( result.IsCompleted )
       MessageBox.Show( "Callback triggered");
}

Note that if you used

Thread t = ...
t.Start()

it will not call any callback method. Only BeginInvoke does that.

Re: Threading question

Steve Messer14-Dec-05 12:02

Steve Messer

14-Dec-05 12:02

Thanks I will try that directly

Re: Threading question

WillemM14-Dec-05 9:20

WillemM

14-Dec-05 9:20

Sounds rather complex, let me think:

Every process should have some kind of semaphore. GetData2 should call wait on the semaphore of GetData1. GetData1 should call signal on the semaphore it has, so that GetData2 continues. GetData3 should call wait on the semaphore of GetData2 and GetData2 should call signal on the semaphore it has, to let GetData3 continue.

This should work just fine and you dont have to worry about a lot of the synchronisation here Smile | :)

There are other ways to do this, but this is by far the simplest solution I can think of.

WM.

What about weapons of mass-construction?

-- modified at 15:21 Wednesday 14th December, 2005 (Fixed some minor spelling issues Poke tongue | ;-P

)

Re: Threading question

Robert Rohde14-Dec-05 10:43

Robert Rohde

14-Dec-05 10:43

Although it seems you already found a solution just another question:
If those three threads get executed sequentially (one after the other) why don't you just call all three methods in a single thread?

Re: Threading question

Steve Messer14-Dec-05 11:17

Steve Messer

14-Dec-05 11:17

Worth a look, thanks

Re: Threading question

Steve Messer14-Dec-05 16:40

Steve Messer

14-Dec-05 16:40

I used a combination of both tips

ThreadStart method1 = new ThreadStart(DoRequests); 
AsyncCallback callback = new AsyncCallback(MyCallbackFunction);
method1.BeginInvoke(callback, null);

void DoRequests()
{
   RequestVehicles();
   RequestCustomers();
   RequestServiceSales();
}

void MyCallbackFunction(IAsyncResult result)
{
   if( result.IsCompleted )
   {
      // All data received add to database or whatever
   }
}

Thanks All

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