Array.Length Property
Gets the total number of elements in all the dimensions of the Array.
Assembly: mscorlib (in mscorlib.dll)
| Exception | Condition |
|---|---|
| OverflowException | The array is multidimensional and contains more than MaxValue elements. |
Retrieving the value of this property is an O(1) operation.
The following example uses the Length property to get the total number of elements in an array. It also uses the GetUpperBound method to determine the number of elements in each dimension of a multidimensional array.
using System; public class Example { public static void Main() { // Declare a single-dimensional string array String[] array1d = { "zero", "one", "two", "three" }; ShowArrayInfo(array1d); // Declare a two-dimensional string array String[,] array2d = { { "zero", "0" }, { "one", "1" }, { "two", "2" }, { "three", "3"}, { "four", "4" }, { "five", "5" } }; ShowArrayInfo(array2d); // Declare a three-dimensional integer array int[, ,] array3d = new int[,,] { { { 1, 2, 3 }, { 4, 5, 6 } }, { { 7, 8, 9 }, { 10, 11, 12 } } }; ShowArrayInfo(array3d); } private static void ShowArrayInfo(Array arr) { Console.WriteLine("Length of Array: {0,3}", arr.Length); Console.WriteLine("Number of Dimensions: {0,3}", arr.Rank); // For multidimensional arrays, show number of elements in each dimension. if (arr.Rank > 1) { for (int dimension = 1; dimension <= arr.Rank; dimension++) Console.WriteLine(" Dimension {0}: {1,3}", dimension, arr.GetUpperBound(dimension - 1) + 1); } Console.WriteLine(); } } // The example displays the following output: // Length of Array: 4 // Number of Dimensions: 1 // // Length of Array: 12 // Number of Dimensions: 2 // Dimension 1: 6 // Dimension 2: 2 // // Length of Array: 12 // Number of Dimensions: 3 // Dimension 1: 2 // Dimension 2: 2 // Dimension 3: 3
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1