Gets the lower bound of the specified dimension in the Array.
Namespace:
System
Assembly:
mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public Function GetLowerBound ( _
dimension As Integer _
) As Integer
Dim instance As Array
Dim dimension As Integer
Dim returnValue As Integer
returnValue = instance.GetLowerBound(dimension)
public int GetLowerBound(
int dimension
)
public:
int GetLowerBound(
int dimension
)
public function GetLowerBound(
dimension : int
) : int
Parameters
- dimension
- Type: System..::.Int32
A zero-based dimension of the Array whose lower bound needs to be determined.
GetLowerBound(0) returns the lower bound for the indexes of the first dimension of the Array, and GetLowerBound(Rank - 1) returns the lower bound of the last dimension of the Array.
This method is an O(1) operation.
The following code example uses GetLowerBound and GetUpperBound to initialize a one-dimensional array and a multidimensional array.
Imports System
Imports Microsoft.VisualBasic
Public Class SamplesArray
Public Shared Sub Main()
' Creates a new one-dimensional Array of type Int32.
Dim my1DIntArray As Array = Array.CreateInstance(GetType(Int32), 5)
' Uses GetLowerBound and GetUpperBound in the for loop.
Dim i As Integer
For i = my1DIntArray.GetLowerBound(0) To my1DIntArray.GetUpperBound(0)
my1DIntArray.SetValue(i + 1, i)
Next i
' Displays the bounds and values of the one-dimensional Array.
Console.WriteLine("One-dimensional Array:")
Console.WriteLine("Rank" + ControlChars.Tab + "Lower" _
+ ControlChars.Tab + "Upper")
Console.WriteLine("{0}" + ControlChars.Tab + "{1}" _
+ ControlChars.Tab + "{2}", 0, my1DIntArray.GetLowerBound(0), _
my1DIntArray.GetUpperBound(0))
Console.WriteLine("Values:")
PrintValues(my1DIntArray)
Console.WriteLine()
' Creates a new three-dimensional Array of type Int32.
Dim my3DIntArray As Array = _
Array.CreateInstance(GetType(Int32), 2, 3, 4)
' Uses GetLowerBound and GetUpperBound in the for loop.
Dim j, k As Integer
For i = my3DIntArray.GetLowerBound(0) _
To my3DIntArray.GetUpperBound(0)
For j = my3DIntArray.GetLowerBound(1) _
To my3DIntArray.GetUpperBound(1)
For k = my3DIntArray.GetLowerBound(2) _
To my3DIntArray.GetUpperBound(2)
my3DIntArray.SetValue(i * 100 + j * 10 + k, i, j, k)
Next k
Next j
Next i
' Displays the bounds and values of the multidimensional Array.
Console.WriteLine("Multidimensional Array:")
Console.WriteLine("Rank" + ControlChars.Tab + "Lower" _
+ ControlChars.Tab + "Upper")
For i = 0 To my3DIntArray.Rank - 1
Console.WriteLine("{0}" + ControlChars.Tab + "{1}" _
+ ControlChars.Tab + "{2}", i, my3DIntArray.GetLowerBound(i), _
my3DIntArray.GetUpperBound(i))
Next i
Console.WriteLine("Values:")
PrintValues(my3DIntArray)
End Sub
Public Shared Sub PrintValues(myArr As Array)
Dim myEnumerator As System.Collections.IEnumerator = _
myArr.GetEnumerator()
Dim i As Integer = 0
Dim cols As Integer = myArr.GetLength(myArr.Rank - 1)
While myEnumerator.MoveNext()
If i < cols Then
i += 1
Else
Console.WriteLine()
i = 1
End If
Console.Write(ControlChars.Tab + "{0}", myEnumerator.Current)
End While
Console.WriteLine()
End Sub
End Class
' 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
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
*/
using namespace System;
void PrintValues( Array^ myArr );
void main()
{
// Creates a new one-dimensional Array instance of type Int32.
Array^ my1DIntArray = Array::CreateInstance( Int32::typeid, 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}", nullptr, my1DIntArray->GetLowerBound( 0 ), my1DIntArray->GetUpperBound( 0 ) );
Console::WriteLine( "Values:" );
PrintValues( my1DIntArray );
Console::WriteLine();
// Creates a new three-dimensional Array instance of type Int32.
Array^ my3DIntArray = Array::CreateInstance( Int32::typeid, 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 );
}
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;
// 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 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
.NET Framework
Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 3.5, 2.0, 1.0
XNA Framework
Supported in: 3.0, 2.0, 1.0
Reference