Decimal.Compare(Decimal, Decimal) 方法

定义

比较两个指定的 Decimal 值。Compares two specified Decimal values.

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。The first value to compare.

d2
Decimal

要比较的第二个值。The second value to compare.

返回

有符号数字,指示 d1d2 的相对值。A signed number indicating the relative values of d1 and d2.

返回值Return value 含义Meaning
小于零Less than zero d1 小于 d2d1 is less than d2.
Zero d1d2 相等。d1 and d2 are equal.
大于零Greater than zero d1 大于 d2d1 is greater than d2.

示例

下面的示例比较了几个 Decimal 值。The following example compares several Decimal values. 请注意,第一个比较表明两个值相等,尽管对 value2 变量执行了减法运算。Note that the first comparison indicates that the two values are equal despite the subtraction operation performed on the value2 variable. 这是因为 Decimal 类型的精度为29位,而这两个值之间的差异只能用30位精度来检测。This is because the Decimal type has 29 digits of precision, whereas a difference between these two values can be detected only with 30 digits of precision.

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
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