Decimal.Compare(Decimal, Decimal) 方法

定义

命名空间:

System

程序集:

System.Runtime.dll

Source:

Decimal.cs

比较两个指定的 Decimal 值。

public:
 static int Compare(System::Decimal d1, System::Decimal d2);

public static int Compare (decimal d1, decimal d2);

static member Compare : decimal * decimal -> int

Public Shared Function Compare (d1 As Decimal, d2 As Decimal) As Integer

参数

d1

Decimal

要比较的第一个值。

d2

Decimal

要比较的第二个值。

返回

Int32

有符号数字，指示 d1 和 d2 的相对值。

返回值	含义
小于零	d1 小于 d2。
零	d1 与 d2 相等。
大于零	d1 大于 d2。

示例

以下示例比较了多个 Decimal 值。 请注意，第一个比较表明，尽管对 value2 变量执行了减法运算，但两个值相等。 这是因为 类型 Decimal 具有 29 位精度，而只能用 30 位精度检测这两个值之间的差异。

using System;

public enum Relationship
{  LessThan = -1, Equals = 0, GreaterThan = 1 }

public class Example
{
   public static void Main()
   {
      decimal value1 = Decimal.MaxValue;
      decimal value2 = value1 - .01m;
      Console.WriteLine("{0} {2} {1}", value1, value2,
                        (Relationship) Decimal.Compare(value1, value2));

      value2 = value1 / 12m - .1m;
      value1 = value1 / 12m;
      Console.WriteLine("{0} {2} {1}", value1, value2,
                        (Relationship) Decimal.Compare(value1, value2));

      value1 = value1 - .2m;
      value2 = value2 + .1m;
      Console.WriteLine("{0} {2} {1}", value1, value2,
                        (Relationship) Decimal.Compare(value1, value2));
   }
}
// The example displays the following output:
//     79228162514264337593543950335 Equals 79228162514264337593543950335
//     6602346876188694799461995861.2 GreaterThan 6602346876188694799461995861.1
//     6602346876188694799461995861.0 LessThan 6602346876188694799461995861.2

open System

type Relationship =
    | LessThan = -1
    | Equals = 0
    | GreaterThan = 1

[<EntryPoint>]
let main _ =
    let value1 = Decimal.MaxValue
    let value2 = value1 - 0.01m
    printfn $"{value1} {Decimal.Compare(value1, value2) |> enum<Relationship>} {value2}"

    let value2 = value1 / 12m - 0.1m
    let value1 = value1 / 12m
    printfn $"{value1} {Decimal.Compare(value1, value2) |> enum<Relationship>} {value2}"

    let value1 = value1 - 0.2m
    let value2 = value2 + 0.1m
    printfn $"{value1} {Decimal.Compare(value1, value2) |> enum<Relationship>} {value2}"

    0

// The example displays the following output:
//     79228162514264337593543950335 Equals 79228162514264337593543950335
//     6602346876188694799461995861.2 GreaterThan 6602346876188694799461995861.1
//     6602346876188694799461995861.0 LessThan 6602346876188694799461995861.2

Public Enum Relationship As Integer
    LessThan = -1
    Equals = 0
    GreaterThan = 1
End Enum

Module Example
   Public Sub Main()
      Dim value1 As Decimal = Decimal.MaxValue
      Dim value2 As Decimal = value1 - .01d
      Console.WriteLine("{0} {2} {1}", value1, value2, 
                        CType(Decimal.Compare(value1, value2), Relationship))   
   
      value2 = value1 / 12d - .1d
      value1 = value1 / 12d
      Console.WriteLine("{0} {2} {1}", value1, value2, 
                        CType(Decimal.Compare(value1, value2), Relationship))   
   
      value1 = value1 - .2d
      value2 = value2 + .1d
      Console.WriteLine("{0} {2} {1}", value1, value2, 
                        CType(Decimal.Compare(value1, value2), Relationship))   
   End Sub
End Module
' The example displays the following output:
'     79228162514264337593543950335 Equals 79228162514264337593543950335
'     6602346876188694799461995861.2 GreaterThan 6602346876188694799461995861.1
'     6602346876188694799461995861.0 LessThan 6602346876188694799461995861.2

另请参阅

• CompareTo(Object)
• Equals(Object)