Convert.ToUInt64 Method (Double)
.NET Framework (current version)
Converts the value of the specified double-precision floating-point number to an equivalent 64-bit unsigned integer.
This API is not CLS-compliant.
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.
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
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
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