String.IConvertible.ToDouble(IFormatProvider) String.IConvertible.ToDouble(IFormatProvider) String.IConvertible.ToDouble(IFormatProvider) Method

定義

如需這個成員的說明,請參閱 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

參數

provider
IFormatProvider IFormatProvider IFormatProvider

物件,提供特定文化特性格式資訊。An object that provides culture-specific formatting information.

傳回

目前 String 物件的轉換值。The converted value of the current String object.

實作

例外狀況

無法剖析目前 String 物件的值。The value of the current String object cannot be parsed.

目前 String 物件的值是小於 MinValue 或大於 MaxValue 的數字。The value of the current String object is a number less than MinValue or greater than MaxValue.

備註

這個成員是明確介面成員實作,This member is an explicit interface member implementation. 只有在 String 執行個體轉換成 IConvertible 介面時,才能使用這個成員。It can be used only when the String instance is cast to an IConvertible interface. 建議的替代做法是呼叫Convert.ToDouble(String, IFormatProvider)方法。The recommended alternative is to call the Convert.ToDouble(String, IFormatProvider) method.

適用於