本文整理匯總了C#中System.IFormattable接口的典型用法代碼示例。如果您正苦於以下問題：C# IFormattable接口的具體用法？C# IFormattable怎麽用？C# IFormattable使用的例子？那麽, 這裏精選的接口代碼示例或許可以為您提供幫助。
IFormattable接口屬於System命名空間，在下文中一共展示了IFormattable接口的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: Temperature
//引入命名空間
using System;
using System.Globalization;
public class Temperature : IFormattable
{
private decimal temp;
public Temperature(decimal temperature)
{
if (temperature < -273.15m)
throw new ArgumentOutOfRangeException(String.Format("{0} is less than absolute zero.",
temperature));
this.temp = temperature;
}
public decimal Celsius
{
get { return temp; }
}
public decimal Fahrenheit
{
get { return temp * 9 / 5 + 32; }
}
public decimal Kelvin
{
get { return temp + 273.15m; }
}
public override string ToString()
{
return this.ToString("G", CultureInfo.CurrentCulture);
}
public string ToString(string format)
{
return this.ToString(format, CultureInfo.CurrentCulture);
}
public string ToString(string format, IFormatProvider provider)
{
if (String.IsNullOrEmpty(format)) format = "G";
if (provider == null) provider = CultureInfo.CurrentCulture;
switch (format.ToUpperInvariant())
{
case "G":
case "C":
return temp.ToString("F2", provider) + " °C";
case "F":
return Fahrenheit.ToString("F2", provider) + " °F";
case "K":
return Kelvin.ToString("F2", provider) + " K";
default:
throw new FormatException(String.Format("The {0} format string is not supported.", format));
}
}
}示例2: Main
public class Example
{
public static void Main()
{
// Use composite formatting with format string in the format item.
Temperature temp1 = new Temperature(0);
Console.WriteLine("{0:C} (Celsius) = {0:K} (Kelvin) = {0:F} (Fahrenheit)\n", temp1);
// Use composite formatting with a format provider.
temp1 = new Temperature(-40);
Console.WriteLine(String.Format(CultureInfo.CurrentCulture, "{0:C} (Celsius) = {0:K} (Kelvin) = {0:F} (Fahrenheit)", temp1));
Console.WriteLine(String.Format(new CultureInfo("fr-FR"), "{0:C} (Celsius) = {0:K} (Kelvin) = {0:F} (Fahrenheit)\n", temp1));
// Call ToString method with format string.
temp1 = new Temperature(32);
Console.WriteLine("{0} (Celsius) = {1} (Kelvin) = {2} (Fahrenheit)\n",
temp1.ToString("C"), temp1.ToString("K"), temp1.ToString("F"));
// Call ToString with format string and format provider
temp1 = new Temperature(100) ;
NumberFormatInfo current = NumberFormatInfo.CurrentInfo;
CultureInfo nl = new CultureInfo("nl-NL");
Console.WriteLine("{0} (Celsius) = {1} (Kelvin) = {2} (Fahrenheit)",
temp1.ToString("C", current), temp1.ToString("K", current), temp1.ToString("F", current));
Console.WriteLine("{0} (Celsius) = {1} (Kelvin) = {2} (Fahrenheit)",
temp1.ToString("C", nl), temp1.ToString("K", nl), temp1.ToString("F", nl));
}
}輸出：
0.00 °C (Celsius) = 273.15 K (Kelvin) = 32.00 °F (Fahrenheit) -40.00 °C (Celsius) = 233.15 K (Kelvin) = -40.00 °F (Fahrenheit) -40,00 °C (Celsius) = 233,15 K (Kelvin) = -40,00 °F (Fahrenheit) 32.00 °C (Celsius) = 305.15 K (Kelvin) = 89.60 °F (Fahrenheit) 100.00 °C (Celsius) = 373.15 K (Kelvin) = 212.00 °F (Fahrenheit) 100,00 °C (Celsius) = 373,15 K (Kelvin) = 212,00 °F (Fahrenheit)