Convert.ToInt64 Method (Single)
.NET Framework 4.5
Converts the value of the specified single-precision floating-point number to an equivalent 64-bit signed integer.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Parameters
- value
- Type: System.Single
The single-precision floating-point number to convert.
Return Value
Type: System.Int64value, rounded to the nearest 64-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.
| Exception | Condition |
|---|---|
| OverflowException | value is greater than Int64.MaxValue or less than Int64.MinValue. |
The following example attempts to convert each element in an array of Single values to a long integer.
float[] values= { Single.MinValue, -1.38e10f, -1023.299f, -12.98f, 0f, 9.113e-16f, 103.919f, 17834.191f, Single.MaxValue }; long result; foreach (float value in values) { try { result = Convert.ToInt64(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 Int64 type.", value); } } // The example displays the following output: // -3.40282346638529E+38 is outside the range of the Int64 type. // -13799999488 is outside the range of the Int64 type. // Converted the Double value -1023.29901123047 to the Int64 value -1023. // Converted the Double value -12.9799995422363 to the Int64 value -13. // Converted the Double value 0 to the Int64 value 0. // Converted the Double value 9.11299983940444E-16 to the Int64 value 0. // Converted the Double value 103.918998718262 to the Int64 value 104. // Converted the Double value 17834.19140625 to the Int64 value 17834. // 3.40282346638529E+38 is outside the range of the Int64 type.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
