UInt64.CompareTo方法用于将当前实例与指定对象或另一个UInt64实例进行比较。它返回一个整数，该整数显示当前实例的值是小于，等于还是大于指定对象或另一个UInt64实例的值。此方法的重载列表中有2种方法，如下所示：
- CompareTo(UInt64)方法
- CompareTo(Object)方法
UInt64.CompareTo(UInt64)方法
此方法用于将当前实例与指定的64位无符号长整数进行比较，并返回一个整数，该整数显示当前实例的值是否小于，等于或大于指定的64位无符号长整数。长整数。
句法：
public int CompareTo (ulong value);在这里，它需要一个无符号的long值进行比较。
返回值：返回一个32位带符号的数字，指示当前实例和value参数的相对值，如下所示：
- 小于零：如果当前实例<值
- 零：如果当前实例=值
- 大于零：如果当前实例>值
下面的程序说明了UInt64.CompareTo(UInt64)方法的用法：
范例1：
// C# program to demonstrate the
// UInt64.CompareTo(UInt64) Method
using System;
class GFG {
// Main Method
public static void Main()
{
// Declaring and initializing value1
ulong value1 = 312312131231;
// Declaring and initializing value2
ulong value2 = 523564123;
// using CompareTo() method
int status = value1.CompareTo(value2);
// checking the status
if (status > 0)
Console.WriteLine("{0} is greater than {1}",
value1, value2);
else if (status < 0)
Console.WriteLine("{0} is less than {1}",
value1, value2);
else
Console.WriteLine("{0} is equal to {1}",
value1, value2);
}
}
输出：
312312131231 is greater than 523564123
范例2：
// C# program to demonstrate the
// UInt64.CompareTo(UInt64) Method
using System;
class GFG {
// Main Method
public static void Main()
{
// calling get() method
get(34432425, 708343);
get(3780, 8920);
get(8543453910, 85345340920);
get(7006789, 7006789);
}
// defining get() method
public static void get(ulong value1,
ulong value2)
{
// using CompareTo() method
int status = value1.CompareTo(value2);
// checking the status
if (status > 0)
Console.WriteLine("{0} is greater than {1}",
value1, value2);
else if (status < 0)
Console.WriteLine("{0} is less than {1}",
value1, value2);
else
Console.WriteLine("{0} is equal to {1}",
value1, value2);
}
}
输出：
34432425 is greater than 708343
3780 is less than 8920
8543453910 is less than 85345340920
7006789 is equal to 7006789
UInt64.CompareTo(Object)方法
此方法用于将当前实例与指定对象进行比较，并返回一个整数，该整数指示当前实例的值是小于，等于还是大于对象的值。
句法：
public int CompareTo (object value);在这里，它需要对象与该实例进行比较，或者为null。
返回值：返回一个32位带符号的数字，指示当前实例和value参数的相对值，如下所示：
- 小于零：如果当前实例<值
- 零：如果当前实例=值
- 大于零：如果当前实例>值
异常：如果value不是UInt64，则抛出ArgumentException。
下面的程序说明了UInt64.CompareTo(Object)方法的用法
范例1：
// C# program to demonstrate the
// UInt64.CompareTo(Object) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// Declaring and initializing value1
ulong value1 = 2324313420;
// Declaring and initializing value2
object value2 = (ulong)687.876;
// using CompareTo() method
int status = value1.CompareTo(value2);
// checking the status
if (status > 0)
Console.WriteLine("{0} is greater than {1}",
value1, value2);
else if (status < 0)
Console.WriteLine("{0} is less than {1}",
value1, value2);
else
Console.WriteLine("{0} is equal to {1}",
value1, value2);
}
catch (ArgumentException e)
{
Console.WriteLine("value2 must be null"+
" or an instance of UInt32");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
2324313420 is greater than 687
示例2：对于ArgumentException
// C# program to demonstrate the
// UInt64.CompareTo(Object) Method
using System;
using System.Globalization;
class GFG {
// Main Method
public static void Main()
{
try {
// Declaring and initializing value1
ulong value1 = 104646549854;
// Declaring and initializing value2
object value2 = 1 / 6;
// using CompareTo() method
int status = value1.CompareTo(value2);
// checking the status
if (status > 0)
Console.WriteLine("{0} is greater than {1}",
value1, value2);
else if (status < 0)
Console.WriteLine("{0} is less than {1}",
value1, value2);
else
Console.WriteLine("{0} is equal to {1}",
value1, value2);
}
catch (ArgumentException e)
{
Console.WriteLine("value2 must be null"+
" or an instance of UInt64");
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
}
输出：
value2 must be null or an instance of UInt64
Exception Thrown: System.ArgumentException
参考：
- https://docs.microsoft.com/zh-cn/dotnet/api/system.uint64.compareto?view=netstandard-2.1