Convert.ToUInt64 Method (Double)
.NET Framework 4
Converts the value of the specified double-precision floating-point number to an equivalent 64-bit unsigned integer.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
- Type: System.Double
The double-precision floating-point number to convert.
Return Value
Type: System.UInt64value, 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.
| Exception | Condition |
|---|---|
| OverflowException | value is less than zero or greater than UInt64.MaxValue. |
The following example attempts to convert each element in an array of Double values to an unsigned long integer.
double[] values= { Double.MinValue, -1.38e10, -1023.299, -12.98, 0, 9.113e-16, 103.919, 17834.191, Double.MaxValue }; ulong result; foreach (double 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: // -1.79769313486232E+308 is outside the range of the UInt64 type. // -13800000000 is outside the range of the UInt64 type. // -1023.299 is outside the range of the UInt64 type. // -12.98 is outside the range of the UInt64 type. // Converted the Double value '0' to the UInt64 value 0. // Converted the Double value '9.113E-16' to the UInt64 value 0. // Converted the Double value '103.919' to the UInt64 value 104. // Converted the Double value '17834.191' to the UInt64 value 17834. // 1.79769313486232E+308 is outside the range of the UInt64 type.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
