How to: Use Regular Expressions to Validate Data Formatting (C++/CLI)
The following code example demonstrates the use of regular expressions to verify the formatting of a string. In the following code example, the string should contain a valid phone number. The following code example uses the string "\d{3}-\d{3}-\d{4}" to indicate that each field represents a valid phone number. The "d" in the string indicates a digit, and the argument after each "d" indicates the number of digits that must be present. In this case, the number is required to be separated by dashes.
Example
// regex_validate.cpp
// compile with: /clr
#using <System.dll>
using namespace System;
using namespace Text::RegularExpressions;
int main()
{
array<String^>^ number =
{
"123-456-7890",
"444-234-22450",
"690-203-6578",
"146-893-232",
"146-839-2322",
"4007-295-1111",
"407-295-1111",
"407-2-5555",
};
String^ regStr = "^\\d{3}-\\d{3}-\\d{4}$";
for ( int i = 0; i < number->Length; i++ )
{
Console::Write( "{0,14}", number[i] );
if ( Regex::IsMatch( number[i], regStr ) )
Console::WriteLine(" - valid");
else
Console::WriteLine(" - invalid");
}
return 0;
}