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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)

public static byte ToByte(
	string value
)

Parameters

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 null.

ExceptionCondition
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 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.

		public void ConvertStringByte(string stringVal) {
			byte byteVal = 0;
			
			try {
				byteVal = System.Convert.ToByte(stringVal);
				System.Console.WriteLine("{0} as a byte is: {1}",
					stringVal, byteVal);
			} 
			catch (System.OverflowException) {
				System.Console.WriteLine(
					"Conversion from string to byte overflowed.");
			}
			catch (System.FormatException) {
				System.Console.WriteLine(
					"The string is not formatted as a byte.");
			}
			catch (System.ArgumentNullException) {
				System.Console.WriteLine(
					"The string is null.");
			}

			//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

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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