Convert.ToSByte Method (Double)

Converts the value of the specified double-precision floating-point number to an equivalent 8-bit signed integer.

This API is not CLS-compliant. 

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

[CLSCompliantAttribute(false)]
public static sbyte ToSByte(
	double value
)

Parameters

value
Type: System.Double

The double-precision floating-point number to convert.

Return Value

Type: System.SByte
value, rounded to the nearest 8-bit signed integer. If value is halfway between two whole numbers, the even number is returned; that is, 4.5 is converted to 4, and 5.5 is converted to 6.

ExceptionCondition
OverflowException

value is greater than SByte.MaxValue or less than SByte.MinValue.

The following example attempts to convert each element in an array of Double values to a signed byte.

double[] numbers = { Double.MinValue, -129.5, -12.7, 0, 16,
                     103.6, 255.0, 1.63509e17, Double.MaxValue};
sbyte result;

foreach (double number in numbers)
{
   try {
      result = Convert.ToSByte(number);
      Console.WriteLine("Converted the {0} value {1} to the {2} value {3}.",
                        number.GetType().Name, number,
                        result.GetType().Name, result);
   }
   catch (OverflowException) {
      Console.WriteLine("The {0} value {1} is outside the range of the SByte type.",
                        number.GetType().Name, number);
   }
}                                  
// The example displays the following output: 
//    The Double value -1.79769313486232E+308 is outside the range of the SByte type. 
//    The Double value -129.5 is outside the range of the SByte type. 
//    Converted the Double value -12.7 to the SByte value -13. 
//    Converted the Double value 0 to the SByte value 0. 
//    Converted the Double value 16 to the SByte value 16. 
//    Converted the Double value 103.6 to the SByte value 104. 
//    The Double value 255 is outside the range of the SByte type. 
//    The Double value 1.63509E+17 is outside the range of the SByte type. 
//    The Double value 1.79769313486232E+308 is outside the range of the SByte type.

.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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