Working with Data Structures in VB.NET HashTable

Data structures like hash tables are useful for storing and accessing data efficiently in VB.NET. In this page, we will discuss how to work with hash tables in VB.NET.

Syntax

To create a hash table in VB.NET, you use the Hashtable class. Here's the syntax for creating a new hash table:

Dim hashTable As New Hashtable()

To add elements to the hash table, you use the Add method:

hashTable.Add(key, value)

To retrieve an element from the hash table, you use the key to return the corresponding value:

Dim value As Object = hashTable(key)

Example

Here's an example of using a hash table to store and retrieve data:

Dim studentGrades As New Hashtable()

' Add grades for students
studentGrades.Add("John", 85)
studentGrades.Add("Mike", 75)
studentGrades.Add("Jane", 92)

' Retrieve grade for John
Dim johnGrade As Integer = CInt(studentGrades("John"))
Console.WriteLine("John's grade: {0}", johnGrade)

Output

The output of the code above will be:

John's grade: 85

Explanation

A hash table is a data structure that maps keys to values. In VB.NET, you can use the Hashtable class to create and manipulate hash tables. To add elements to the hash table, you use the Add method with the key and value. To retrieve an element from the hash table, you use the key to return the corresponding value.

Use

Hash tables are useful for storing and retrieving data quickly and efficiently. They are commonly used in many programming applications, including databases, search engines, and caching systems.

Important Points

• Hash tables in VB.NET are represented by the Hashtable class.
• To add elements to the hash table, you use the Add method with the key and value.
• To retrieve an element from the hash table, you use the key to return the corresponding value.

Summary

In this page, we discussed how to work with hash tables in VB.NET. We covered the syntax, example, output, explanation, use, important points, and summary of hash tables. By using hash tables in your VB.NET applications, you can store and retrieve data efficiently, making your applications faster and more responsive.