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Anonymous wrote:
dfgdfgdf
Are you learning ABCD......
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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Yes, you ARE a moron. Next...
Christian Graus - Microsoft MVP - C++
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very funny 
V
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My problem is that i need to do some addition, subtraction, and multiplication on a number and then display the result in a textbox or label or something like that so that it is displayed in the window. I have been trying to find how to convert from an int to a system::string (if it is even possible) but could not find anything. Am i going about this wrong just cannot figure out how to do it correctly. I am using microsoft visual c++ express edition 2005 beta 2.
I have tried searching the web for anything like this and could not find anything that would work. I have been working on this for over a week now and connot figure it out. I am new to programming so it is probably pretty simple but i cant find any help on this. Any help that anyone could offer would be greatly appreciated.
-Kyle
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system::string means you're using managed C++, not normal C++ ? system::string has a Format method to do what you want. If you were using C++, then istringstream or *shudder* sprintf would convert int to string, or CString::Format ( from memory ).
Christian Graus - Microsoft MVP - C++
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i am using managed c++. if you could include a sample code of how to use the System::String Format function it would help out greatly. i looked at it but it asked for a System::String and a System::Object what would i put for the each and where does the int variable go?
if i use a textbox named txt and an int variable named num, would it be:
txt->Text->Format(txt->Text, num);
is this right or am i way off??
thank you for the help.
-Kyle
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The system::string is the format string, and the object is the object to format. You can pass in as many objects as you like, they are numbered from 0.
txt->Text = System::String::Format("{0}", num);
Christian Graus - Microsoft MVP - C++
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I tried that a few different ways some ways compiled but did not do what i wanted it to and the way that was posted gives me the following error:
error C2664: 'System::String ^System::String::Format(System::String ^,System::Object ^)' : cannot convert parameter 1 from 'int' to 'System::String ^'<br />
1> No user-defined-conversion operator available, or<br />
1> No standard conversion exists from the boxed form of the arithmetic type to the target type
and would not compile.
i searched the web and found the stringbuilder class and was wondering if this would do what i wanted it to.
- Kyle
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A string builder will do what you want, but it's overkill.
The basic problem is that MC++ is a crappy kludge, I'm glad I've never used it in depth. You need to manually box your integer for string::format to work. You do it like this:
int n = 2003;
Console::WriteLine(System::String::Format("{0}", __box(n)));
That is, this is an example of how to box your integer.
Christian Graus - Microsoft MVP - C++
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if i try this it gives me the following error:
error C2227: left of '->ToString' must point to class/struct/union/generic type<br />
1> type is 'int'
- Kyle
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Thank you Jose Lamas Rios. The num.ToString() worked.
I had been tring for quite some time to figure that out thank you very much.
- Kyle
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i have sdk netmeeting3, i want to edit its. but i can't edit its with class wizart on VC++, can i?
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You cannot edit the SDK, no. You can merely use the headers and lib files to link to it, so your code can call it.
Christian Graus - Microsoft MVP - C++
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I am learning Visual C++.net and have found that WinExec is no longer used/supported. I am trying to create a Windows Form employing a combo box. I want the user to select an item from the drop down list and have them run a program when the run button is clicked. How do I get The SelectedIndexChanged event to fire whenever the user selects a new program? Thanks for your inputs.
RRL
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cupdoze wrote:
have them run a program when the run button is clicked
If that's the bit you're stuck on, the answer is ::ShellExecute.
Christian Graus - Microsoft MVP - C++
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cupdoze wrote:
have found that WinExec is no longer used/supported.
In continuation With Mr. Graus,
you can refer this article too.....
http://www.codeproject.com/system/newbiespawn.asp[^]
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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can give some example of source code or project to write the server and client programming
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I searched this site by typing 'client server' in the search dialog you can see just below the Code Project logo above, and found this[^].
Christian Graus - Microsoft MVP - C++
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After downloaded the server and client source code, I do not know how to build 2 project that one is for client and another is for server. can give some guide to build it? I really weak in computer programming and never touch Visual C++ before..
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Are you being asked to do this by your boss or your teacher ? It's a really significant task if you've never used C++ before, if you can abandon it for something simpler, that would be sensible.
Why can't you build it ? What happens ? All you need to do is open the project and choose 'build', assuming you have the right version of VC++ ( I'm not sure which the project uses, actually )
Christian Graus - Microsoft MVP - C++
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It's the inevitable...
I wrote a menu in the resource file and I entered it into the CreateWindowEx function call and it shows up. I also added code to the message handler to catch clicks. However, when I click items, nothing happens. Here's the handler:
switch (Msg) {<br />
case WM_COMMAND: {<br />
HandleMenuFunctions (hWnd, wParam);<br />
return 0;<br />
} break;<br />
default: {<br />
return DefWindowProc (hWnd, Msg, wParam, lParam);<br />
} break;<br />
}
HandleMenuFunctions is just a function that has another switch to do different things based on the menu item selected:
void HandleMenuFunctions (HWND hWnd, WPARAM wParam) {<br />
switch (LOWORD(wParam)) {<br />
case ID_FILE_QUIT: {<br />
MessageBox (hWnd, "Posting Quit Message now", "Notice", MB_ICONINFORMATION);<br />
PostQuitMessage(0);<br />
} break;<br />
default: { MessageBox (hWnd, "Encountered unknown menu ID", "Notice", MB_ICONSTOP); } break;<br />
}<br />
}
(excuse that smiley face, that should be a PostQuitMessage(0); call.)
Also, when I go to click the menu, it only shows me the popup menu under File every other time. The other times I click, the menu just loses focus. I don't know if that's important or not. Thanks in advance.
edit: I put breakpoints on that first WM_COMMAND case to see if the message is ever captured and it isn't. Either I'm catching the wrong message or something is wrong with the menu. I noticed that there are ways to declare a menu when I register the class in WNDCLASSEX and also when I call CreateWindowEx. I tried only declaring the menu when I register the class and the menu doesn't show, but when I declare it only in CreateWindowEx, it shows up. That might be important too.
solution: I fixed the problem, it had to do with my main message loop, it also fixed the thing where the menu loses focus. I removed the PeekMessage call and just let GetMessage get the message. Here's what I ended up with:
while (GetMessage(msg, NULL, 0, 0)) {<br />
if (msg->message == WM_QUIT) {
return ((int) msg->wParam);<br />
}<br />
TranslateMessage(msg);<br />
DispatchMessage(msg);<br />
}<br />
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