Spliting a String in C++/CLI

[T RATHA KRISHNAN]

Hi! I've a file called test.ini. The contents of this file is: PreviousCheck =true LID =ratha PWD =rtrrules I've to read the file and assign each value after the equal(=) sign to three System::String^ variables. I don't want the text preceding the equal sign(i.e PreviousCheck =,LID = and PWD = all I don't want). How to do this in C++/CLI?

[Ger Hayden]

Firstly, what you are doing is better suited to the app.config key/value approach. But to answer the question investigate the 'Split' method on the String^ class in C++/CLI to achieve what you want.

Ger

[T RATHA KRISHNAN]

Hi! I used the following code to get a line from the file(and then I will split it into parts).

System::IO::StreamReader reader("test.ini", System::IO::FileMode::Open);
System::String^ line = reader.ReadLine();

But I got the following error: error C2664: 'System::IO::StreamReader::StreamReader(System::IO::Stream ^,bool)' : cannot convert parameter 1 from 'const char [17]' to 'System::IO::Stream ^' Reason: cannot convert from 'const char *' to 'System::IO::Stream ^' No user-defined-conversion operator available, or Cannot convert an unmanaged type to a managed type How to get rid of this error?

[Ger Hayden]

I suggest putting "Test.INI" in a variable defined as String^ e.g.

String^ FileName;
FileName = String::Format("Test.INI");

Finally when you are splitting your input strings define the index character as wchar_t

Ger

[John Schroedl]

This seems to work:

#include "stdafx.h"

using namespace System;

int main(array<String ^> ^args)
{
array<String^>^ lines = System::IO::File::ReadAllLines("C:\\temp\\test.ini", System::Text::Encoding::UTF8);

Console::WriteLine("Key\\t\\tValue");

for each (String^ line in lines)
{
	if (String::IsNullOrWhiteSpace(line))
		continue;

	int offset = line->LastIndexOf("=");
	if (offset >= 0) 
	{
		String^ key = line->Substring(0, offset)->Trim();
		String^ value = line->Substring(offset+1)->Trim();

		Console::WriteLine(key + "\\t\\t" + value);
	}
}

return 0;

}

John

[Lost User]

T.RATHA KRISHNAN wrote:

How to get rid of this error?

I think this is a subtle one; you have provided a char* in parameter 1 of the constructor, but no such constructor exists. You need to use a String object as the path parameter for the compiler to select the correct constructor. You can find all the gory details here[^] on MSDN.

I must get a clever new signature for 2011.