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Array.GetLowerBound 方法

获取 Array 中指定维度的下限。

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

public int GetLowerBound (
	int dimension
)
public int GetLowerBound (
	int dimension
)
public function GetLowerBound (
	dimension : int
) : int
不适用。

参数

dimension

Array 的从零开始的维度,其下限需要确定。

返回值

Array 中指定维度的下限。

异常类型条件

IndexOutOfRangeException

dimension 小于零。

- 或 -

dimension 等于或大于 Rank

GetLowerBound(0) 返回 Array 的第一维的索引下限,GetLowerBound(Rank - 1) 返回 Array 的最后一维的下限。

此方法是 O(1) 操作。

下面的代码示例使用 GetLowerBoundGetUpperBound 初始化一维数组和多维数组。

 using System;
 public class SamplesArray  {
 
    public static void Main()  {
 
       // Creates a new one-dimensional Array of type Int32.
       Array my1DIntArray = Array.CreateInstance( typeof(Int32), 5 );
 
       // Uses GetLowerBound and GetUpperBound in the for loop.
       for ( int i = my1DIntArray.GetLowerBound(0); i <= my1DIntArray.GetUpperBound(0); i++ )
          my1DIntArray.SetValue( i+1, i );
 
       // Displays the bounds and values of the one-dimensional Array.
       Console.WriteLine( "One-dimensional Array:" );
       Console.WriteLine( "Rank\tLower\tUpper" );
       Console.WriteLine( "{0}\t{1}\t{2}", 0, my1DIntArray.GetLowerBound(0), my1DIntArray.GetUpperBound(0) );
       Console.WriteLine( "Values:" );
       PrintValues( my1DIntArray );
       Console.WriteLine();
 
       // Creates a new three-dimensional Array of type Int32.
       Array my3DIntArray = Array.CreateInstance( typeof(Int32), 2, 3, 4 );
 
       // Uses GetLowerBound and GetUpperBound in the for loop.
       for ( int i = my3DIntArray.GetLowerBound(0); i <= my3DIntArray.GetUpperBound(0); i++ )
          for ( int j = my3DIntArray.GetLowerBound(1); j <= my3DIntArray.GetUpperBound(1); j++ )
             for ( int k = my3DIntArray.GetLowerBound(2); k <= my3DIntArray.GetUpperBound(2); k++ )  {
                my3DIntArray.SetValue( (i*100)+(j*10)+k, i, j, k );
             }
 
       // Displays the bounds and values of the multidimensional Array.
       Console.WriteLine( "Multidimensional Array:" );
       Console.WriteLine( "Rank\tLower\tUpper" );
       for ( int i = 0; i < my3DIntArray.Rank; i++ )
          Console.WriteLine( "{0}\t{1}\t{2}", i, my3DIntArray.GetLowerBound(i), my3DIntArray.GetUpperBound(i) );
       Console.WriteLine( "Values:" );
       PrintValues( my3DIntArray );
    }
 
 
    public static void PrintValues( Array myArr )  {
       System.Collections.IEnumerator myEnumerator = myArr.GetEnumerator();
       int i = 0;
       int cols = myArr.GetLength( myArr.Rank - 1 );
       while ( myEnumerator.MoveNext() )  {
          if ( i < cols )  {
             i++;
          } else  {
             Console.WriteLine();
             i = 1;
          }
          Console.Write( "\t{0}", myEnumerator.Current );
       }
       Console.WriteLine();
    }
 }
 /*
 This code produces the following output.
 
 One-dimensional Array:
 Rank    Lower    Upper
 0    0    4
 Values:
     1    2    3    4    5
 
 Multidimensional Array:
 Rank    Lower    Upper
 0    0    1
 1    0    2
 2    0    3
 Values:
     0    1    2    3
     10    11    12    13
     20    21    22    23
     100    101    102    103
     110    111    112    113
     120    121    122    123
*/ 

import System.*;

public class SamplesArray
{
    public static void main(String[] args)
    {
        // Creates a new one-dimensional Array of type Int32.
        Array my1DIntArray = Array.CreateInstance(Int32.class.ToType(), 5);
        // Uses GetLowerBound and GetUpperBound in the for loop.
        for (int i = my1DIntArray.GetLowerBound(0); i <= my1DIntArray.
            GetUpperBound(0); i++) {
            my1DIntArray.SetValue((Int32)(i + 1), i);
        }
        // Displays the bounds and values of the one-dimensional Array.
        Console.WriteLine("One-dimensional Array:");
        Console.WriteLine("Rank\tLower\tUpper");
        Console.WriteLine("{0}\t{1}\t{2}", (Int32)0, (Int32)my1DIntArray.
            GetLowerBound(0), (Int32)my1DIntArray.GetUpperBound(0));
        Console.WriteLine("Values:");
        PrintValues(my1DIntArray);
        Console.WriteLine();
        // Creates a new three-dimensional Array of type Int32.
        Array my3DIntArray = Array.CreateInstance(Int32.class.ToType(), 2, 3, 4);
        // Uses GetLowerBound and GetUpperBound in the for loop.
        for (int i = my3DIntArray.GetLowerBound(0); i <= my3DIntArray.
            GetUpperBound(0); i++) {
            for (int j = my3DIntArray.GetLowerBound(1); j <= my3DIntArray.
                GetUpperBound(1); j++) {
                for (int k = my3DIntArray.GetLowerBound(2); k <= my3DIntArray.
                    GetUpperBound(2); k++) {
                    my3DIntArray.SetValue((Int32)(i * 100 + j * 10 + k), i, j, k);
                }
            }
        }  // Displays the bounds and values of the multidimensional Array.
        Console.WriteLine("Multidimensional Array:");
        Console.WriteLine("Rank\tLower\tUpper");
        for (int i = 0; i < my3DIntArray.get_Rank(); i++) {
            Console.WriteLine("{0}\t{1}\t{2}", (Int32)i, (Int32)my3DIntArray.
                GetLowerBound(i), (Int32)my3DIntArray.GetUpperBound(i));
        }
        Console.WriteLine("Values:");
        PrintValues(my3DIntArray);
    } //main

    public static void PrintValues(Array myArr)
    {
        System.Collections.IEnumerator myEnumerator = myArr.GetEnumerator();
        int i = 0;
        int cols = myArr.GetLength(myArr.get_Rank() - 1);
        while (myEnumerator.MoveNext()) {
            if (i < cols) {
                i++;
            }
            else {
                Console.WriteLine();
                i = 1;
            }
            Console.Write("\t{0}", myEnumerator.get_Current());
        }
        Console.WriteLine();
    } //PrintValues
} //SamplesArray

/*
 This code produces the following output.
 
 One-dimensional Array:
 Rank    Lower    Upper
 0    0    4
 Values:
     1    2    3    4    5
 
 Multidimensional Array:
 Rank    Lower    Upper
 0    0    1
 1    0    2
 2    0    3
 Values:
     0    1    2    3
     10    11    12    13
     20    21    22    23
     100    101    102    103
     110    111    112    113
     120    121    122    123
*/

import System;

// Creates a new one-dimensional Array of type Int32.
var my1DIntArray : System.Array = System.Array.CreateInstance( Int32, 5 );

// Uses GetLowerBound and GetUpperBound in the for loop.
for ( var m : int = my1DIntArray.GetLowerBound(0); m <= my1DIntArray.GetUpperBound(0); m++ )
  my1DIntArray.SetValue( Int32(m+1), m );

// Displays the bounds and values of the one-dimensional Array.
Console.WriteLine( "One-dimensional Array:" );
Console.WriteLine( "Rank\tLower\tUpper" );
Console.WriteLine( "{0}\t{1}\t{2}", 0, my1DIntArray.GetLowerBound(0), my1DIntArray.GetUpperBound(0) );
Console.WriteLine( "Values:" );
PrintValues( my1DIntArray );
Console.WriteLine();

// Creates a new three-dimensional Array of type Int32.
var my3DIntArray : System.Array = System.Array.CreateInstance( Int32, 2, 3, 4 );

// Uses GetLowerBound and GetUpperBound in the for loop.
for ( var i : int = my3DIntArray.GetLowerBound(0); i <= my3DIntArray.GetUpperBound(0); i++ )
  for ( var j : int = my3DIntArray.GetLowerBound(1); j <= my3DIntArray.GetUpperBound(1); j++ )
     for ( var k : int = my3DIntArray.GetLowerBound(2); k <= my3DIntArray.GetUpperBound(2); k++ )  {
        my3DIntArray.SetValue( Int32((i*100)+(j*10)+k), i, j, k );
     }

// Displays the bounds and values of the multidimensional Array.
Console.WriteLine( "Multidimensional Array:" );
Console.WriteLine( "Rank\tLower\tUpper" );
for ( var l : int = 0; l < my3DIntArray.Rank; l++ )
  Console.WriteLine( "{0}\t{1}\t{2}", l, my3DIntArray.GetLowerBound(l), my3DIntArray.GetUpperBound(l) );
Console.WriteLine( "Values:" );
PrintValues( my3DIntArray );
 
 
function PrintValues( myArr : System.Array)  {
   var myEnumerator : System.Collections.IEnumerator  = myArr.GetEnumerator();
   var i : int = 0;
   var cols : int = myArr.GetLength( myArr.Rank - 1 );
   while ( myEnumerator.MoveNext() )  {
      if ( i < cols )  {
         i++;
      } else  {
         Console.WriteLine();
         i = 1;
      }
      Console.Write( "\t{0}", myEnumerator.Current );
   }
   Console.WriteLine();
}
 /*
 This code produces the following output.
 
 One-dimensional Array:
 Rank    Lower    Upper
 0    0    4
 Values:
     1    2    3    4    5
 
 Multidimensional Array:
 Rank    Lower    Upper
 0    0    1
 1    0    2
 2    0    3
 Values:
     0    1    2    3
     10    11    12    13
     20    21    22    23
     100    101    102    103
     110    111    112    113
     120    121    122    123
*/ 

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

Windows Vista、Microsoft Windows XP SP2 和 Windows Server 2003 SP1 支持 Microsoft .NET Framework 3.0。

.NET Framework

受以下版本支持:3.0、2.0、1.1、1.0

.NET Compact Framework

受以下版本支持:2.0、1.0

XNA Framework

受以下版本支持:1.0

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