Convert.ToUInt64 Method (Decimal)

.NET Framework (current version)

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Converts the value of the specified decimal number to an equivalent 64-bit unsigned integer.

This API is not CLS-compliant.

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

Syntax

```[CLSCompliantAttribute(false)]
public static ulong ToUInt64(
decimal value
)
```

Parameters

value
Type: System.Decimal

The decimal number to convert.

Return Value

Type: System.UInt64

value, rounded to the nearest 64-bit unsigned 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.

Exceptions

Exception Condition
OverflowException

value is less than zero or greater than UInt64.MaxValue.

Examples

The following example attempts to convert each element in an array of Decimal values to an unsigned long integer.

```decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
199.55m, 9214.16m, Decimal.MaxValue };
ulong result;

foreach (decimal value in values)
{
try {
result = Convert.ToUInt64(value);
Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
value.GetType().Name, value,
result.GetType().Name, result);
}
catch (OverflowException) {
Console.WriteLine("{0} is outside the range of the UInt64 type.",
value);
}
}
// The example displays the following output:
//    -79228162514264337593543950335 is outside the range of the UInt64 type.
//    -1034.23 is outside the range of the UInt64 type.
//    -12 is outside the range of the UInt64 type.
//    Converted the Decimal value '0' to the UInt64 value 0.
//    Converted the Decimal value '147' to the UInt64 value 147.
//    Converted the Decimal value '199.55' to the UInt64 value 200.
//    Converted the Decimal value '9214.16' to the UInt64 value 9214.
//    79228162514264337593543950335 is outside the range of the UInt64 type.
```

Version Information

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1