IConvertible Interface defines methods that convert the current instance to a language runtime type : IConvertible « Data Types « C# / C Sharp

1. C# / C Sharp
2. Data Types
3. IConvertible

IConvertible Interface defines methods that convert the current instance to a language runtime type

 

    using System;

  class Complex : IConvertible
  {
    double  x;
    double  y;

    public Complex(double x, double y)
    {
      this.x = x;
      this.y = y;
    }

    public TypeCode GetTypeCode()
    {
      return TypeCode.Object;
    }

    bool IConvertible.ToBoolean(IFormatProvider provider)
    {
      if(  (x != 0.0) || (y != 0.0) )
        return true;
      else
        return false;
    }

    double GetDoubleValue()
    {
      return Math.Sqrt(x*x + y*y);
    }

    byte IConvertible.ToByte(IFormatProvider provider)
    {
      return Convert.ToByte(GetDoubleValue());
    }

    char IConvertible.ToChar(IFormatProvider provider)
    {
      return Convert.ToChar(GetDoubleValue());
    }

    DateTime IConvertible.ToDateTime(IFormatProvider provider)
    {
      return Convert.ToDateTime(GetDoubleValue());
    }

    decimal IConvertible.ToDecimal(IFormatProvider provider)
    {
      return Convert.ToDecimal(GetDoubleValue());
    }

    double IConvertible.ToDouble(IFormatProvider provider)
    {
      return GetDoubleValue();
    }

    short IConvertible.ToInt16(IFormatProvider provider)
    {
      return Convert.ToInt16(GetDoubleValue());
    }

    int IConvertible.ToInt32(IFormatProvider provider)
    {
      return Convert.ToInt32(GetDoubleValue());
    }

    long IConvertible.ToInt64(IFormatProvider provider)
    {
      return Convert.ToInt64(GetDoubleValue());
    }

    sbyte IConvertible.ToSByte(IFormatProvider provider)
    {
      return Convert.ToSByte(GetDoubleValue());
    }

    float IConvertible.ToSingle(IFormatProvider provider)
    {
      return Convert.ToSingle(GetDoubleValue());
    }

    string IConvertible.ToString(IFormatProvider provider)
    {
      return String.Format("({0}, {1})", x, y);
    }

    object IConvertible.ToType(Type conversionType, IFormatProvider provider)
    {
      return Convert.ChangeType(GetDoubleValue(),conversionType);
    }

    ushort IConvertible.ToUInt16(IFormatProvider provider)
    {
      return Convert.ToUInt16(GetDoubleValue());
    }

    uint IConvertible.ToUInt32(IFormatProvider provider)
    {
      return Convert.ToUInt32(GetDoubleValue());
    }

    ulong IConvertible.ToUInt64(IFormatProvider provider)
    {
      return Convert.ToUInt64(GetDoubleValue());
    }

  }
  class Class1
  {
    static void Main(string[] args)
    {
      Complex    testComplex = new Complex(4,7);

      Console.WriteLine(Convert.ToBoolean(testComplex));
    }
  }

   
  

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