Convert::ToSByte Method (String, IFormatProvider)
Converts the specified string representation of a number to an equivalent 8-bit signed integer, using the specified culture-specific formatting information.
Assembly: mscorlib (in mscorlib.dll)
[CLSCompliantAttribute(false)] public: static signed char ToSByte( String^ value, IFormatProvider^ provider )
Parameters
- value
- Type: System::String
A string that contains the number to convert.
- provider
- Type: System::IFormatProvider
An object that supplies culture-specific formatting information.
| Exception | Condition |
|---|---|
| ArgumentNullException | value is nullptr. |
| FormatException | value does not consist of an optional sign followed by a sequence of digits (0 through 9). |
| OverflowException | value represents a number that is less than SByte::MinValue or greater than SByte::MaxValue. |
provider is an IFormatProvider instance that obtains a NumberFormatInfo object. The NumberFormatInfo object provides culture-specific information about the format of value. If provider is nullptr, the NumberFormatInfo for the current culture is used.
If you prefer not to handle an exception if the conversion fails, you can call the SByte::TryParse method instead. It returns a Boolean value that indicates whether the conversion succeeded or failed.
The following example converts string representations of SByte values with the ToSByte method, using an IFormatProvider object.
// Example of the Convert::ToSByte( String* ) and // Convert::ToSByte( String*, IFormatProvider* ) methods. using namespace System; using namespace System::Globalization; const __wchar_t * protoFmt = L"{0,-20}{1,-20}{2}"; // Get the exception type name; remove the namespace prefix. String^ GetExceptionType( Exception^ ex ) { String^ exceptionType = ex->GetType()->ToString(); return exceptionType->Substring( exceptionType->LastIndexOf( '.' ) + 1 ); } void ConvertToSByte( String^ numericStr, IFormatProvider^ provider ) { Object^ defaultValue; Object^ providerValue; // Convert numericStr to SByte without a format provider. try { defaultValue = Convert::ToSByte( numericStr ); } catch ( Exception^ ex ) { defaultValue = GetExceptionType( ex ); } // Convert numericStr to SByte with a format provider. try { providerValue = Convert::ToSByte( numericStr, provider ); } catch ( Exception^ ex ) { providerValue = GetExceptionType( ex ); } Console::WriteLine( gcnew String( protoFmt ), numericStr, defaultValue, providerValue ); } int main() { // Create a NumberFormatInfo object and set several of its // properties that apply to numbers. NumberFormatInfo^ provider = gcnew NumberFormatInfo; // These properties affect the conversion. provider->NegativeSign = "neg "; provider->PositiveSign = "pos "; // These properties do not affect the conversion. // The input string cannot have decimal and group separators. provider->NumberDecimalSeparator = "."; provider->NumberNegativePattern = 0; Console::WriteLine( "This example of\n" " Convert::ToSByte( String* ) and \n" " Convert::ToSByte( String*, IFormatProvider* ) " "\ngenerates the following output. It converts " "several strings to \nSByte values, using " "default formatting or a NumberFormatInfo object.\n" ); Console::WriteLine( gcnew String( protoFmt ), "String to convert", "Default/exception", "Provider/exception" ); Console::WriteLine( gcnew String( protoFmt ), "-----------------", "-----------------", "------------------" ); // Convert strings, with and without an IFormatProvider. ConvertToSByte( "123", provider ); ConvertToSByte( "+123", provider ); ConvertToSByte( "pos 123", provider ); ConvertToSByte( "-123", provider ); ConvertToSByte( "neg 123", provider ); ConvertToSByte( "123.", provider ); ConvertToSByte( "(123)", provider ); ConvertToSByte( "128", provider ); ConvertToSByte( "-129", provider ); } /* This example of Convert::ToSByte( String* ) and Convert::ToSByte( String*, IFormatProvider* ) generates the following output. It converts several strings to SByte values, using default formatting or a NumberFormatInfo object. String to convert Default/exception Provider/exception ----------------- ----------------- ------------------ 123 123 123 +123 123 FormatException pos 123 FormatException 123 -123 -123 FormatException neg 123 FormatException -123 123. FormatException FormatException (123) FormatException FormatException 128 OverflowException OverflowException -129 OverflowException FormatException */
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.