Convert.ToUInt64 Method (Object)

Converts the value of the specified object to a 64-bit unsigned integer.

This API is not CLS-compliant. 

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

[CLSCompliantAttribute(false)]
public static ulong ToUInt64(
	Object value
)

Parameters

value
Type: System.Object

An object that implements the IConvertible interface, or null.

Return Value

Type: System.UInt64
A 64-bit unsigned integer that is equivalent to value, or zero if value is null.

ExceptionCondition
FormatException

value is not in an appropriate format.

InvalidCastException

value does not implement the IConvertible interface.

-or-

The conversion is not supported.

OverflowException

value represents a number that is less than UInt64.MinValue or greater than UInt64.MaxValue.

The return value is the result of invoking the IConvertible.ToUInt64 method of the underlying type of value.

The following example attempts to convert each element in an object array to an unsigned long integer.

object[] values = { true, -12, 163, 935, 'x', new DateTime(2009, 5, 12),
                    "104", "103.0", "-1",
                    "1.00e2", "One", 1.00e2, 16.3e42};
ulong result;

foreach (object 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("The {0} value {1} is outside the range of the UInt64 type.",
                        value.GetType().Name, value);
   }                     
   catch (FormatException) {
      Console.WriteLine("The {0} value {1} is not in a recognizable format.",
                        value.GetType().Name, value);
   }
   catch (InvalidCastException) {
      Console.WriteLine("No conversion to a UInt64 exists for the {0} value {1}.",
                        value.GetType().Name, value);

   }
}                           
// The example displays the following output: 
//    Converted the Boolean value True to the UInt64 value 1. 
//    The Int32 value -12 is outside the range of the UInt64 type. 
//    Converted the Int32 value 163 to the UInt64 value 163. 
//    Converted the Int32 value 935 to the UInt64 value 935. 
//    Converted the Char value x to the UInt64 value 120. 
//    No conversion to a UInt64 exists for the DateTime value 5/12/2009 12:00:00 AM. 
//    Converted the String value 104 to the UInt64 value 104. 
//    The String value 103.0 is not in a recognizable format. 
//    The String value -1 is outside the range of the UInt64 type. 
//    The String value 1.00e2 is not in a recognizable format. 
//    The String value One is not in a recognizable format. 
//    Converted the Double value 100 to the UInt64 value 100. 
//    The Double value 1.63E+43 is outside the range of the UInt64 type.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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