Array::GetLowerBound Method
Gets the lower bound of the specified dimension in the Array.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- dimension
- Type: System::Int32
A zero-based dimension of the Array whose lower bound needs to be determined.
| Exception | Condition |
|---|---|
| IndexOutOfRangeException | dimension is less than zero. -or- dimension is equal to or greater than Rank. |
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.
The GetLowerBound method is not affected by the number of elements in the array or if the array is empty.
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.
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 */
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.