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String::IsNullOrEmpty Method
Visual Studio 2010
Indicates whether the specified string is nullptr or an Empty string.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
- Type: System::String
The string to test.
Return Value
Type: System::Booleantrue if the value parameter is nullptr or an empty string (""); otherwise, false.
The following example determines whether each of three strings has a value, is an empty string or is nullptr.
using namespace System; String^ Test( String^ s ) { if (String::IsNullOrEmpty(s)) return "is null or empty"; else return String::Format( "(\"{0}\") is neither null nor empty", s ); } int main() { String^ s1 = "abcd"; String^ s2 = ""; String^ s3 = nullptr; Console::WriteLine( "String s1 {0}.", Test( s1 ) ); Console::WriteLine( "String s2 {0}.", Test( s2 ) ); Console::WriteLine( "String s3 {0}.", Test( s3 ) ); } // The example displays the following output: // String s1 ("abcd") is neither null nor empty. // String s2 is null or empty. // String s3 is null or empty.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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