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string to int

 
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  #1
May 7th, 2008
Does anyone know how to convert a "String^" data type in a visual studio 2005 forms app to an "int"? Ive tried atoi and casting to no success. Any ideas? Thanks.
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Re: string to int

 
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  #2
May 7th, 2008
try
C++ Syntax (Toggle Plain Text) 
  1. Int32::Parse(stringname)
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Re: string to int

 
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  #3
May 7th, 2008
C++/CLI handles boxing and unboxing implicitly. Either of these work just peachy:
C++ Syntax (Toggle Plain Text) 
  1. using namespace System;
  2.  
  3. #include <iostream>
  4.  
  5. int main()
  6. {
  7.   String^ s = "123";
  8.   int x = Convert::ToInt32(s);
  9.  
  10.   std::cout << x * x << '\n';
  11. }
C++ Syntax (Toggle Plain Text) 
  1. using namespace System;
  2.  
  3. #include <iostream>
  4.  
  5. int main()
  6. {
  7.   String^ s = "123";
  8.   int x = Int32::Parse(s);
  9.  
  10.   std::cout << x * x << '\n';
  11. }
If at first you don't succeed, keep on sucking until you do succeed.
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Re: string to int

 
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  #4
May 7th, 2008
[edit] misread the OP
Last edited by niek_e; May 7th, 2008 at 12:02 pm.
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Re: string to int

 
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  #5
May 7th, 2008
Thanks, but new issue.

C++ Syntax (Toggle Plain Text) 
  1.  String^    comPort  = "COM" + this->RS232CommPortNum->Value;
  2. int        baudRate = Convert::ToInt32(this->cbBaudRate->ValueMember);
  3. SerialPort com      = gcnew SerialPort(comPort, baudRate);

error C2664: 'System::IO:orts:erialPort:erialPort(System::ComponentModel::IContainer ^)' : cannot convert parameter 1 from 'System::IO:orts:erialPort *' to 'System::ComponentModel::IContainer ^'

this should work but it is giving me a wierd error. There are seven different overloads for SerialPort() and I dont understand why it is interpreting it this way. Any suggestions? Thanks again.

I want to use the SerialPort(SYSTEM string^ portname, int baudrate)
Last edited by Nemoticchigga; May 7th, 2008 at 12:10 pm.
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Re: string to int

 
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  #6
May 7th, 2008
gcnew creates a new managed reference object. You need to declare the variable holding the object as a managed reference:
C++ Syntax (Toggle Plain Text) 
  1. SerialPort^ com = gcnew SerialPort(comPort, baudRate);
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Re: string to int

 
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  #7
May 7th, 2008
Great, I dont have much experience with visual studio forms, thanks a lot for your help.
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