C# Decimal.CompareTo()用法及代碼示例

此方法用於將當前實例與指定的對象或Decimal進行比較，並返回其相對值的指示。此方法的重載列表中有2種方法，如下所示：

CompareTo(Decimal)方法
CompareTo(Object)方法

Decimal.CompareTo(Decimal) Method

此方法用於將當前實例與指定的Decimal對象進行比較，並返回其相對值的比較。

用法:

public int CompareTo (decimal value);

在這裏，需要對象與該實例進行比較。

返回值：它返回一個32位帶符號的數字，指示當前實例和value參數的相對值，如下所示：

小於零：如果當前實例
零：如果當前實例=值
大於零：如果當前實例>值

以下示例程序旨在說明Decimal.CompareTo(Decimal)方法的用法

示例1:

// C# program to demonstrate the 
// Decimal.CompareTo(Double) Method 
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
  
        // Declaring and initializing value1 
        decimal value1 = 10; 
  
        // Declaring and initializing value2 
        decimal value2 = 20; 
  
        // compare both decimal value 
        // 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); 
    } 
}

輸出：

10 is less than 20

示例2:

// C# program to demonstrate the 
// Decimal.CompareTo(Double) Method 
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        // calling get() method 
        get(5, 7); 
        get(30, 20); 
        get(10, 20); 
        get(7, -12); 
    } 
  
    // defining get() method 
    public static void get(decimal value1, 
                          decimal 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); 
    } 
}

輸出：

5 is less than 7
30 is greater than 20
10 is less than 20
7 is greater than -12

Decimal.CompareTo(Object) Method

此方法用於將當前實例與指定對象進行比較，並返回其相對值的比較。

用法:

public int CompareTo (object value);

在這裏，它需要對象與該實例進行比較，或者為null。

返回值：它返回一個32位帶符號的數字，指示當前實例和value參數的相對值，如下所示：

小於零：如果當前實例
零：如果當前實例=值
大於零：如果當前實例>值

異常：如果value不為null，則拋出ArgumentException。

下麵的程序說明Decimal.CompareTo(Object)方法的用法

示例1:

// C# program to demonstrate the 
// Decimal.CompareTo(object) Method 
using System; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        try { 
  
            // Declaring and initializing value1 
            decimal value1 = 10; 
  
            // Declaring and initializing value2 
            object value2 = (decimal)9.8765400E+2; 
  
            // compare both decimal value 
            // using CompareTo() method 
            int status = value1.CompareTo(value2); 
  
            // cheking 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 decimal"); 
            Console.Write("Exception Thrown: "); 
            Console.Write("{0}", e.GetType(), e.Message); 
        } 
    } 
}

輸出：

10 is less than 987.654

示例2:對於ArgumentException

// C# program to demonstrate the 
// Decimal.CompareTo(object) Method 
using System; 
using System.Globalization; 
  
class GFG { 
  
    // Main Method 
    public static void Main() 
    { 
        try { 
  
            // Declaring and initializing value1 
            decimal value1 = 10; 
  
            // Declaring and initializing value2 
            object value2 = 1 / 3; 
  
            // 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 decimal"); 
            Console.Write("Exception Thrown: "); 
            Console.Write("{0}", e.GetType(), e.Message); 
        } 
    } 
}

輸出：

value2 must be decimal
Exception Thrown: System.ArgumentException

參考：

https://docs.microsoft.com/en-us/dotnet/api/system.decimal.compareto?view=netframework-4.7.2

相關用法

注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 Decimal.CompareTo() Method in C#。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。