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Convert::ToByte Method (String)

Converts the specified string representation of a number to an equivalent 8-bit unsigned integer.

Namespace:  System
Assemblies:   System.Runtime.Extensions (in System.Runtime.Extensions.dll)
  mscorlib (in mscorlib.dll)

static unsigned char ToByte(
	String^ value


Type: System::String

A string that contains the number to convert.

Return Value

Type: System::Byte
An 8-bit unsigned integer that is equivalent to value, or zero if value is nullptr.


value does not consist of an optional sign followed by a sequence of digits (0 through 9).


value represents a number that is less than Byte::MinValue or greater than Byte::MaxValue.

Using the ToByte(String) method is equivalent to passing value to the Byte::Parse(String) method. value is interpreted by using the formatting conventions of the current thread culture.

If you prefer not to handle an exception if the conversion fails, you can call the Byte::TryParse method instead. It returns a Boolean value that indicates whether the conversion succeeded or failed.

The following example converts a String value to a Byte.

   void ConvertStringByte( String^ stringVal )
      Byte byteVal = 0;

         byteVal = System::Convert::ToByte( stringVal );
         System::Console::WriteLine( " {0} as a Byte is: {1}",
            stringVal, byteVal );
      catch ( System::OverflowException^ ) 
            "Conversion from String to Byte overflowed." );
      catch ( System::FormatException^ ) 
            "The String is not formatted as a Byte." );
      catch ( System::ArgumentNullException^ ) 
         System::Console::WriteLine( "The String is 0." );

      //The conversion from Byte to String is always valid.
      stringVal = System::Convert::ToString( byteVal );
      System::Console::WriteLine( " {0} as a String is {1}",
         byteVal, stringVal );

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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