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Decimal.ToInt64 Method

Converts the value of the specified Decimal to the equivalent 64-bit signed integer.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static long ToInt64(
	decimal d
)

Parameters

d
Type: System.Decimal

The decimal number to convert.

Return Value

Type: System.Int64
A 64-bit signed integer equivalent to the value of d.

ExceptionCondition
OverflowException

d is less than Int64.MinValue or greater than Int64.MaxValue.

The return value is the integral part of the decimal value; fractional digits are truncated.

The following example uses the ToInt64 method to convert decimal numbers to Int64 values.

using System;

class Example
{
   public static void Main( )
   {
      decimal[] values = { 123m, new Decimal(123000, 0, 0, false, 3), 
                           123.999m, 18446744073709551615.999m, 
                           18446744073709551616m, 9223372036854775807.999m, 
                           9223372036854775808m, -0.999m, -1m, 
                           -9223372036854775808.999m, 
                           -9223372036854775809m };

      foreach (var value in values) {
         try {             
            long number = Decimal.ToInt64(value);
            Console.WriteLine("{0} --> {1}", value, number);       
         }
         catch (OverflowException e)
         {
             Console.WriteLine("{0}: {1}", e.GetType().Name, value);
         }   
      }
   }
}
// The example displays the following output: 
//   123 --> 123 
//   123.000 --> 123 
//   123.999 --> 123 
//   OverflowException: 18446744073709551615.999 
//   OverflowException: 18446744073709551616 
//   9223372036854775807.999 --> 9223372036854775807 
//   OverflowException: 9223372036854775808 
//   -0.999 --> 0 
//   -1 --> -1 
//   -9223372036854775808.999 --> -9223372036854775808 
//   OverflowException: -9223372036854775809

.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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