Decimal.Compare(Decimal, Decimal) 方法

定义

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

有符号数字,指示 d1d2 的相对值。

返回值 含义
小于零 d1 小于 d2
d1d2 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

适用于

另请参阅