Programming Forums > Application Development > C++

The Dark · Apr 21st, 2006, 5:30 AM

Try

txtItem->Text = "0";
String current;
current = txtItem->Text;

Animatronic · Apr 21st, 2006, 6:38 AM

(Toggle Plain Text)

txtItem->Text = "0";
String ^ current;
current = txtItem->Text;

Why the txtItem->Text = "0" bit? Thats going to clear any data that your about to read...

DaWei · Apr 21st, 2006, 7:01 AM

Actually, it makes a zero-shaped character, neh?

Twilight · Apr 21st, 2006, 3:32 PM

Quote:

Originally Posted by Animatronic

(Toggle Plain Text)

txtItem->Text = "0";
String ^ current;
current = txtItem->Text;

Why the txtItem->Text = "0" bit? Thats going to clear any data that your about to read...

I just put it there so I know I wouldn't have issues with it trying to read something that wasn't there. It'll go once I actually have to read stuff.

And the ^ thing fixed it for me, so could somebody mind telling me jsut what the hell that thing does?

Twilight · Apr 21st, 2006, 4:15 PM

Also, how do I go about converting a String ^ type string to an integer value? In regualr C++, I would just use atoi() or something along those lines, but it won't let me do it with these new managed variable types.

And just to clarify, if I have a string containing "4388", I would need int a = 4388, not just the ascii value of each character.

Twilight · Apr 22nd, 2006, 12:48 AM

And is it possible to convert these new Strings into old C++ style strings, so I can use the same functions on them?

nnxion · Apr 22nd, 2006, 5:00 AM

Well I don't know why you are doing C++.NET, I would definitely use C# for that. If you know C++ and/or Java it's pretty easy to do most of the stuff in C#.

Animatronic · Apr 22nd, 2006, 6:51 AM

I agree with nnxion, if your want to develop on .net, and you can use any lanuage, use C#. It was developed from sratch for .net and so is the most natural lanuage to use. C++/CLI (C++.net) on the other hand, was developed as a managed / unmanaged transition layer so developers could still use their favourite unmanaged libraries in a .net enviroment. It certainly wasn't developed to be easy to use and confuses the hell out of me about it's subtle managed / unmanaged rules.

As for parsing if your using a managed type parse using a managed technique dont try to convert back and forth between managed / unmanaged types, just learn to do it the managed way. Thats what C++/CLI is about know how to do everything in both the managed and unmanaged way.

This shoulld work:

(Toggle Plain Text)

	String ^ S = "54";
	int i = int::Parse(S);

Twilight · Apr 22nd, 2006, 5:12 PM

Quote:

Originally Posted by nnxion

Well I don't know why you are doing C++.NET, I would definitely use C# for that. If you know C++ and/or Java it's pretty easy to do most of the stuff in C#.

All I did was grab Visual C++, because I thought it would be the most familiar. However, if C# is easier, I'll definitely give it a try. Know where I can pick up free development software?

Jimbo · Apr 22nd, 2006, 5:39 PM

http://msdn.microsoft.com/vstudio/express/visualcsharp/

Apr 21st, 2006, 5:30 AM	#21
The Dark Expert Programmer Join Date: Jun 2005 Posts: 852 Rep Power: 4	Try (Toggle Plain Text) txtItem->Text = "0"; String current; current = txtItem->Text; txtItem->Text = "0"; String current; current = txtItem->Text;

Apr 21st, 2006, 6:38 AM	#22
Animatronic Programmer Join Date: Jun 2005 Posts: 99 Rep Power: 4	(Toggle Plain Text) txtItem->Text = "0"; String ^ current; current = txtItem->Text; txtItem->Text = "0"; String ^ current; current = txtItem->Text; Why the txtItem->Text = "0" bit? Thats going to clear any data that your about to read...

Apr 21st, 2006, 7:01 AM	#23
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Actually, it makes a zero-shaped character, neh? __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Apr 22nd, 2006, 5:00 AM	#27
nnxion Programming Guru Join Date: Jun 2005 Location: elemental plane Posts: 1,429 Rep Power: 5	Well I don't know why you are doing C++.NET, I would definitely use C# for that. If you know C++ and/or Java it's pretty easy to do most of the stuff in C#. __________________ "Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for." -- Socrates

Apr 22nd, 2006, 6:51 AM	#28
Animatronic Programmer Join Date: Jun 2005 Posts: 99 Rep Power: 4	I agree with nnxion, if your want to develop on .net, and you can use any lanuage, use C#. It was developed from sratch for .net and so is the most natural lanuage to use. C++/CLI (C++.net) on the other hand, was developed as a managed / unmanaged transition layer so developers could still use their favourite unmanaged libraries in a .net enviroment. It certainly wasn't developed to be easy to use and confuses the hell out of me about it's subtle managed / unmanaged rules. As for parsing if your using a managed type parse using a managed technique dont try to convert back and forth between managed / unmanaged types, just learn to do it the managed way. Thats what C++/CLI is about know how to do everything in both the managed and unmanaged way. This shoulld work: (Toggle Plain Text) String ^ S = "54"; int i = int::Parse(S); String ^ S = "54"; int i = int::Parse(S);

Apr 21st, 2006, 4:15 PM	#25
Twilight Programmer Join Date: Apr 2006 Location: Calgary, Alberta Posts: 67 Rep Power: 3	Also, how do I go about converting a String ^ type string to an integer value? In regualr C++, I would just use atoi() or something along those lines, but it won't let me do it with these new managed variable types. And just to clarify, if I have a string containing "4388", I would need int a = 4388, not just the ascii value of each character.

Apr 22nd, 2006, 12:48 AM	#26
Twilight Programmer Join Date: Apr 2006 Location: Calgary, Alberta Posts: 67 Rep Power: 3	And is it possible to convert these new Strings into old C++ style strings, so I can use the same functions on them?

Apr 22nd, 2006, 5:39 PM	#30
Jimbo Battle Programmer Join Date: Feb 2006 Location: Bellevue, WA, USA Posts: 766 Rep Power: 3	http://msdn.microsoft.com/vstudio/express/visualcsharp/

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Programming Forums > Application Development > C++

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