LessThanOrEqual 运算符

TimeSpan.LessThanOrEqual 运算符

更新:2007 年 11 月

指示指定的 TimeSpan 是否小于或等于另一个指定的 TimeSpan

命名空间:  System
程序集:  mscorlib(在 mscorlib.dll 中)

public static bool operator <=(
	TimeSpan t1,
	TimeSpan t2
)
J# 不支持重载运算符。
JScript 不支持重载运算符。

参数

t1
类型:System.TimeSpan
TimeSpan
t2
类型:System.TimeSpan
TimeSpan

返回值

类型:System.Boolean
如果 t1 的值小于或等于 t2 的值,则为 true;否则为 false

下面的代码示例使用 LessThanOrEqual 运算符,将几个 TimeSpan 对象同一个参考 TimeSpan 进行比较。

// Example of the TimeSpan relational operators.
using System;

class TSRelationalOpsDemo
{
    const string dataFmt = "{0,34}    {1}" ;

    // Compare TimeSpan parameters, and display them with the results.
    static void CompareTimeSpans( TimeSpan Left, TimeSpan Right, 
        string RightText )
    {
        Console.WriteLine( );
        Console.WriteLine( dataFmt, "Right: " + RightText, Right );
        Console.WriteLine( dataFmt, "Left == Right", Left == Right );
        Console.WriteLine( dataFmt, "Left >  Right", Left > Right );
        Console.WriteLine( dataFmt, "Left >= Right", Left >= Right );
        Console.WriteLine( dataFmt, "Left != Right", Left != Right );
        Console.WriteLine( dataFmt, "Left <  Right", Left < Right );
        Console.WriteLine( dataFmt, "Left <= Right", Left <= Right );
    }

    static void Main( )
    {
        TimeSpan Left = new TimeSpan( 2, 0, 0 );

        Console.WriteLine(
            "This example of the TimeSpan relational operators " +
            "generates \nthe following output. It creates several " +
            "different TimeSpan \nobjects and compares them with " +
            "a 2-hour TimeSpan.\n" );
        Console.WriteLine( dataFmt, 
            "Left: TimeSpan( 2, 0, 0 )", Left );

        // Create objects to compare with a 2-hour TimeSpan.
        CompareTimeSpans( Left, new TimeSpan( 0, 120, 0 ), 
            "TimeSpan( 0, 120, 0 )" );
        CompareTimeSpans( Left, new TimeSpan( 2, 0, 1 ), 
            "TimeSpan( 2, 0, 1 )" );
        CompareTimeSpans( Left, new TimeSpan( 2, 0, -1 ), 
            "TimeSpan( 2, 0, -1 )" );
        CompareTimeSpans( Left, TimeSpan.FromDays( 1.0 / 12D ), 
            "TimeSpan.FromDays( 1 / 12 )" );
    } 
} 

/*
This example of the TimeSpan relational operators generates
the following output. It creates several different TimeSpan
objects and compares them with a 2-hour TimeSpan.

         Left: TimeSpan( 2, 0, 0 )    02:00:00

      Right: TimeSpan( 0, 120, 0 )    02:00:00
                     Left == Right    True
                     Left >  Right    False
                     Left >= Right    True
                     Left != Right    False
                     Left <  Right    False
                     Left <= Right    True

        Right: TimeSpan( 2, 0, 1 )    02:00:01
                     Left == Right    False
                     Left >  Right    False
                     Left >= Right    False
                     Left != Right    True
                     Left <  Right    True
                     Left <= Right    True

       Right: TimeSpan( 2, 0, -1 )    01:59:59
                     Left == Right    False
                     Left >  Right    True
                     Left >= Right    True
                     Left != Right    True
                     Left <  Right    False
                     Left <= Right    False

Right: TimeSpan.FromDays( 1 / 12 )    02:00:00
                     Left == Right    True
                     Left >  Right    False
                     Left >= Right    True
                     Left != Right    False
                     Left <  Right    False
                     Left <= Right    True
*/ 


// Example of the TimeSpan relational operators.
import System.*;

class TSRelationalOpsDemo
{
    private static String dataFmt = "{0,34}    {1}";

    // Compare TimeSpan parameters, and display them with the results.
    static void CompareTimeSpans(TimeSpan left, TimeSpan right,
            String rightText)
    {
        Console.WriteLine();
        Console.WriteLine(dataFmt, "Right: " + rightText, right);
        Console.WriteLine(dataFmt, "Left == Right", ((System.Boolean)
            Convert.ToBoolean((left.CompareTo(right)) == 0)).toString());
        Console.WriteLine(dataFmt, "Left >  Right", ((System.Boolean)
            Convert.ToBoolean((left.CompareTo(right)) > 0)).toString());
        Console.WriteLine(dataFmt, "Left >= Right", ((System.Boolean)
            Convert.ToBoolean((left.CompareTo(right)) >= 0)).toString());
        Console.WriteLine(dataFmt, "Left != Right", ((System.Boolean)
            Convert.ToBoolean((left.CompareTo(right)) != 0)).toString());
        Console.WriteLine(dataFmt, "Left <  Right", ((System.Boolean)
            Convert.ToBoolean((left.CompareTo(right)) < 0)).toString());
        Console.WriteLine(dataFmt, "Left <= Right", ((System.Boolean)
            Convert.ToBoolean((left.CompareTo(right)) <= 0)).toString());
    } //CompareTimeSpans

    public static void main(String[] args)
    {
        TimeSpan left = new TimeSpan(2, 0, 0);

        Console.WriteLine(("This example of the TimeSpan relational operators"
            + "generates \nthe following output. It creates several "
            + "different TimeSpan \nobjects and compares them with " 
            +    "a 2-hour TimeSpan.\n"));
        Console.WriteLine(dataFmt, "left: TimeSpan( 2, 0, 0 )", left);

        // Create objects to compare with a 2-hour TimeSpan.
        CompareTimeSpans(left, new TimeSpan(0, 120, 0),
            "TimeSpan( 0, 120, 0 )");
        CompareTimeSpans(left, new TimeSpan(2, 0, 1), 
            "TimeSpan( 2, 0, 1 )");
        CompareTimeSpans(left, new TimeSpan(2, 0, -1),
            "TimeSpan( 2, 0, -1 )");
        CompareTimeSpans(left, TimeSpan.FromDays((1.0 / 12.0)), 
            "TimeSpan.FromDays( 1 / 12 )");
    } //main
} //TSRelationalOpsDemo

/*
This example of the TimeSpan relational operators generates
the following output. It creates several different TimeSpan
objects and compares them with a 2-hour TimeSpan.

         left: TimeSpan( 2, 0, 0 )    02:00:00

      right: TimeSpan( 0, 120, 0 )    02:00:00
                     left == right    True
                     left >  right    False
                     left >= right    True
                     left != right    False
                     left <  right    False
                     left <= right    True

        right: TimeSpan( 2, 0, 1 )    02:00:01
                     left == right    False
                     left >  right    False
                     left >= right    False
                     left != right    True
                     left <  right    True
                     left <= right    True

       right: TimeSpan( 2, 0, -1 )    01:59:59
                     left == right    False
                     left >  right    True
                     left >= right    True
                     left != right    True
                     left <  right    False
                     left <= right    False

right: TimeSpan.FromDays( 1 / 12 )    02:00:00
                     left == right    True
                     left >  right    False
                     left >= right    True
                     left != right    False
                     left <  right    False
                     left <= right    True
*/


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