Managed C++/CLI

Re: Dispatching for events?

2-Apr-08 4:33

Don Rolando wrote:
I cannot modify the design of the library which is embedded in my assembly. I have these callbacks fired from the lib-file's worker thread.

Don Rolando wrote:
I cannot hide the dispatching process from the user (or can I?), because it must be implemented in the app's event handler - so the user has to write that code himself.

That information is very confusing. If it is your assembly, why can't you modify it?

led mike

Don Rolando2-Apr-08 5:54

Don Rolando

2-Apr-08 5:54

The assembly is from me, right... but not the linked lib-file which generates it's own worker threads and calls the callbacks. That's kind of a black box which's architectural design I cannot modify in any way.

But I can try to start the dispatching when firing the event out of these callbacks. That's still within the assembly (but would however not beautify the general architecture),

Silly thing is that I could not find examples for BeginInvoke on delegates for C++/CLI so far... only on controls or in C#; and I read that C++/CLI is different in that case and cannot be handled the same way... but I will get it work soon, I am sure. Smile | :)

migrating from Visual Studio .NET 2003 to Visual Studio 2005

mayag1-Apr-08 0:53

mayag

1-Apr-08 0:53

Hello all,

I'd very grateful for your help with compilation error I get after migrating from Visual Studio .NET 2003 to Visual Studio 2005.

class A is a managed class which contains pointer pPtr to unmanaged class as public member
class B is a managed class, derived from A.
In constructor of B there is an initialization of pPtr

after migrating from Visual Studio .NET 2003 to Visual Studio 2005 I get a compilation error:
cannot access a private member of class A (pPtr)

I'm using Old Syntax.

Thanks in advance,
Maya

Re: migrating from Visual Studio .NET 2003 to Visual Studio 2005

led mike1-Apr-08 4:30

Re: fill and submit a form

1-Apr-08 4:30

mayag wrote:
I'm using Old Syntax.

I don't recommend that.

As to your problem the newer C++ compilers are more standards compliant than the old ones. private is private, as in, not visible to derived classes. If you want derived classes to access the member make it protected, although this is not a normal design holding the principle of encapsulation but that is another matter.

Also Microsoft maintains a page of the breaking changes between compliers which could help you. There are also like a migration guide or something. Also here on CodeProject there exists an excellent set of articles introducing the CLI language extensions, I highly recommend those to anyone new to CLI.

led mike

fill and submit a form

joscha31-Mar-08 9:21

joscha

31-Mar-08 9:21

i have a major problem with the HtmlDocument HtmlElement ... methods...

im tryn to code a browser in wich i can automaticle fill a form and submit it.

this is the form code <code>form name="loginform" method="POST" action="/login.php">
<input class="loginname" type="text" name="name" value="" style="width:8em;" maxlength="60" />
<input class="passwort" type="password" name="password" value="" style="width:8em;" maxlength="60" />
<input type="submit" name="login" value="Login" style="width:7em;" /><br /></code>

this are my attempts

<code> HtmlDocument ^doc = webBrowser1->Document;
label1->Text = doc->Title->ToString();

//HtmlElement ^feld1 = webBrowser1->Document->GetElementsByTagName("name");
//HtmlElement ^feld1 = webBrowser1->Document->Forms->GetElementsByName("loginname");
//feld1->SetAttribute("HALLO",name);
//doc->GetElementsByTagName("loginname");
HtmlElementCollection ^feld2 = webBrowser1->Document->Forms;
feld2->GetElementsByName("loginname");

//HtmlDocument ^feld2 = webBrowser1->Document->Forms->GetElementsByName("name");
//feld2->SetAttribute("Hallo",name);

//HtmlElement ^button = webBrowser1->Document->GetElementById("Login");
//button->InvokeMember;
//HtmlInputDocument ^name = doc("name",0);
//doc->HtmlDocument::Forms::get();

//doc->GetElementsByTagName("login");
//doc->Forms->GetElementsByName("login");
//doc->GetElementById("login")</code>

can anyone help me with this? i'm desperated

led mike31-Mar-08 9:24

Re: fill and submit a form

31-Mar-08 9:24

Is there some specific reason you don't just make a HTTP Post request?

led mike

joscha31-Mar-08 9:33

joscha

31-Mar-08 9:33

well i like to understand this methodes. because i need them later to find links and pictures in the document

Re: fill and submit a form

fredsparkle3-Apr-08 7:44

fredsparkle

3-Apr-08 7:44

I assume you are working inside of DOM from the web browser object?

If so you directly interact with the elements them self, no need to try to submit the post directly as the browser object will do that for you.

System::String^ part = "XYZ";
HtmlElement^ x = WebBrowser::Document::GetElementById("PartNum");
if (x != nullptr)
{
x->SetAttribute("value", part);
x = WebBrowser::Document::GetElementById("Submit");
if (x != nullptr)
{
x->InvokeMember("click");
}
}

text files in C++

Cary D. Rutherford31-Mar-08 5:03

31-Mar-08 5:03

How do I read in words from a text file one at a time? I do not want the blank space or puncuation.
The file is long.

Mark Salsbery31-Mar-08 7:12

Mark Salsbery

31-Mar-08 7:12

While there's still data in the file
{
Read an arbitrary amount of the file
Loop through the data read, parsing out the words
}

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Cary D. Rutherford31-Mar-08 7:48

31-Mar-08 7:48

So like this?

while (!eof())<br />
while (fin != '\n')<br />
{<br />
fin >> words[i];<br />
i++;<br />
}<br />
}

Mark Salsbery31-Mar-08 7:59

Mark Salsbery

31-Mar-08 7:59

Something like that should work, although it looks like you're parsing lines, not words.

Many stream classes have built-in support for reading lines of text, but I know of none that
parse words.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Cary D. Rutherford31-Mar-08 8:51

31-Mar-08 8:51

The thing is I need to read them in from a file. Then check then againest the words before it and place them in a binary tree and if that word is in the tree I need to increament a counter to show that there are 2 or have ever many of that word are in the file.
Cary

led mike31-Mar-08 9:10

http://www.cplusplus.com/reference/iostream/manipulators/skipws.html[^]

31-Mar-08 9:10

led mike

Cary D. Rutherford31-Mar-08 9:19

Re: text files in C++ [modified]

31-Mar-08 9:19

led Mike.
thanks so much this is a great help. Big Grin | :-D

Cary D. Rutherford2-Apr-08 9:22

2-Apr-08 9:22

Okay I have a question

const int MAX = 30;<br />
char fileName[MAX];<br />
char name[MAX];<br />
cout << "enter the file name: " << endl;<br />
cin >> name;<br />
fileName = name + ".txt";

My question is when I try and compile this it give me this error.
invalid operands of types `char[30]' and `const char[5]' to binary `operator+'
What is wrong with this code. I was told it is correct however I can not get it to compile.
led mike thanks for the great help on the last problem.

modified on Wednesday, April 2, 2008 3:55 PM

Mark Salsbery2-Apr-08 13:43

Mark Salsbery

2-Apr-08 13:43

Cary D. Rutherford wrote:
What is wrong with this code.

You can't concatenate char arrays like that in C/C++.

Here's one way you could build fileName:

//fileName = name + ".txt";
strcpy(fileName, name);
strcat(fileName, ".txt");

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Cary D. Rutherford2-Apr-08 14:50

How to add Gif file into Datagrid

2-Apr-08 14:50

Thanks Mark. I was told wrong. I thank you for clearing this up for me.
Now it works and I understand.
Thank you again.
Cary

palanirajan30-Mar-08 22:56

palanirajan

30-Mar-08 22:56

hi i have to add the gif file into to my datagrid.
i was very new to vc++ dotnet application. i tried to load gif file like bitmap file, it display the image not the action in the file.
how do i import gif file into datagrid??

thanks in adv
shivapalanirajan k.

iam a software engineer working for varisis technologies bangalore

Cannot open appication on other pc.

Member 454227230-Mar-08 20:40

Member 4542272

30-Mar-08 20:40

I cannot run my application .exe on other pc. Error message like this "The application has failed to start because the application configuration is incorrect. Reinstall the application may fix the problem." But I can open the application on my own pc which I built and debugged the application. What may be the problem?

led mike31-Mar-08 4:25

31-Mar-08 4:25

Member 4542272 wrote:
What may be the problem?

The problem very likely is that you have not fulfilled your responsibility as a developer and read the MSDN Documentation on Deployment for the tools you used in constructing your application. Did I get it right?

led mike

Member 454227231-Mar-08 23:53

Member 4542272

31-Mar-08 23:53

I am still a student. Every semester I change to use different software depend on the project. Frankily speaking, this is the first time I use visual studio. I do admit that I have skipped the MSDN Documentation due to the time constraint. I just did the coding, built and debugged it to come out the .exe file then assumed that it can be run on same window platform on other machine. Did my answer statisfy you?

led mike1-Apr-08 5:22

1-Apr-08 5:22

Member 4542272 wrote:
Did my answer statisfy you?

Yes, I was right. Now let's recap. You don't have time to read the deployment documentation but you do have time to read the same information if someone types it into a forum message? I suggest you take a course in Logic while at the University, it tends to come in handy while developing software.

Member 4542272 wrote:
then assumed

Also you will find that making assumptions doesn't come in very handy while developing software.

led mike

Member 45422722-Apr-08 20:09

Member 4542272

2-Apr-08 20:09

Ya, I will have time to read it because that is the solution. Let see a scenario: if you are going to have test 2 days later and still have ten chapters not yet finish study, even worse that you no pay attention during lecture, what will you do? As for me, i will hope that lecturer can give some tips or go through past year paper question to get some hints. That is what I am doing.

When I started this thread, I didn't have any clue about the problem. If solution is too long to write in forum, I would just expected that someone give me a direction, e.g, read the MSDN deployment documents. Now I will read it, thats all. One more thing, in my field of study, assumption is important and a course of logic not exist in my university.

led mike3-Apr-08 6:19