how-to-use-regular-expressions-to-rearrange-data-cpp-cli.md

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How to: Use Regular Expressions to Rearrange Data (C++/CLI) | Microsoft Docs		11/04/2016			cpp-windows		article	C++	regular expressions [C++], rearranging data data [C++], rearranging	5f91e777-9471-424e-ba75-dca3d1b49e42	9	mikeblome	mblome	ghogen

How to: Use Regular Expressions to Rearrange Data (C++/CLI)

The following code example demonstrates how the .NET Framework regular expression support can be used to rearrange, or reformat data. The following code example uses the xref:System.Text.RegularExpressions.Regex and xref:System.Text.RegularExpressions.Match classes to extract first and last names from a string and then display these name elements in reverse order.

The xref:System.Text.RegularExpressions.Regex class is used to construct a regular expression that describes the current format of the data. The two names are assumed to be separated by a comma and can use any amount of white-space around the comma. The xref:System.Text.RegularExpressions.Match method is then used to analyze each string. If successful, first and last names are retrieved from the xref:System.Text.RegularExpressions.Match object and displayed.

Example

// regex_reorder.cpp  
// compile with: /clr  
#using <System.dll>  
using namespace System;  
using namespace Text::RegularExpressions;  
  
int main()  
{  
   array<String^>^ name =   
   {  
      "Abolrous, Sam",   
      "Berg,Matt",   
      "Berry , Jo",  
      "www.contoso.com"  
   };  
  
   Regex^ reg = gcnew Regex("(?<last>\\w*)\\s*,\\s*(?<first>\\w*)");  
  
   for ( int i=0; i < name->Length; i++ )  
   {  
      Console::Write( "{0,-20}", name[i] );  
      Match^ m = reg->Match( name[i] );  
      if ( m->Success )  
      {  
         String^ first = m->Groups["first"]->Value;  
         String^ last = m->Groups["last"]->Value;  
         Console::WriteLine("{0} {1}", first, last);  
      }  
      else  
         Console::WriteLine("(invalid)");  
   }  
   return 0;  
}  

See Also

.NET Framework Regular Expressions
.NET Programming with C++/CLI (Visual C++)