Complete set: Intro to C - Bill Buchanan

3 Arrays and Collections
3.1 Introduction
This module covers the key elements of arrays, indexers and collections. It covers:
• Arrays.
• Reading from CSV files.
• System.Collections.
• ArrayLists.
• HashTables.
3.2 Arrays
Simple variables, such as int, float, double and string only hold a single element.
This is fine when we have only a few things to store, but it is difficult to process data
elements in a sequential way. Thus, programming languages support arrays which
allow more than one element to be stored under a common name, which allows the
elements to be indexed.
In C# an array is created from an object of type System.Array, as illustrated in
Figure 3.1. The main methods are:
duction to .NET
Intro
BinarySearch()
Clear()
Clone()
Copy()
CopyTo()
CreateInstance()
GetLength()
IndexOf()
Initialize()
LastIndexOf()
Reverse()
SetValue()
Sort()
Performs a binary on a one‐dimensional array
Sets a range of elements to zero, False or NULL.
Make a shallow copy of the array.
Copies a range of values in an array.
Copies one array to another.
Create a multidimensional array.
Return the number of elements in the array.
Search for an object, and return the first index value of its place.
Set all the elements in the array to their default value.
Returns the last object in the array.
Reverses the array.
Sets a specific array element to a value.
Performs a sort on the array.
Agilent .NET Course: Arrays and Collections 2