Decimal.IConvertible.ToDouble(IFormatProvider) 方法

定义

有关此成员的说明,请参见 ToDouble(IFormatProvider)For a description of this member, see ToDouble(IFormatProvider).

 virtual double System.IConvertible.ToDouble(IFormatProvider ^ provider) = IConvertible::ToDouble;
double IConvertible.ToDouble (IFormatProvider provider);
Function ToDouble (provider As IFormatProvider) As Double Implements IConvertible.ToDouble

参数

provider
IFormatProvider

忽略此参数。This parameter is ignored.

返回

当前实例的值,已转换为 DoubleThe value of the current instance, converted to a Double.

实现

注解

此成员是显式接口成员的实现。This member is an explicit interface member implementation. 它只能在 Decimal 实例被强制转换为 IConvertible 接口时使用。It can be used only when the Decimal instance is cast to an IConvertible interface. 建议的替代方法是调用 Decimal.ToDouble 方法或 Convert.ToDouble 方法。The recommended alternative is to call either the Decimal.ToDouble method or the Convert.ToDouble method.

由于 Double 的有效位数低于 Decimal,因此此操作可能会产生舍入错误。Because a Double has fewer significant digits than a Decimal, this operation may produce round-off errors.

适用于