Hash Table In Vb.net

HashTable stores a Key Value pair type collection of data . We can retrive items from hashTable to provide the key . Both key and value are Objects. The common functions using in Hashtable are :

Add : To add a pair of value in HashTable Syntax : HashTable.Add(Key,Value) Key : The Key value Value : The value of corrosponding key ContainsKey : Check if a specified key exist or not Synatx : HashTable.ContainsKey(key) Key : The Key value for search in HahTable ContainsValue : Check the specified Value exist in HashTable Synatx : HashTable.ContainsValue(Value) Value : Search the specified Value in HashTable Remove : Remove the specified Key and corrosponding Value Syntax : HashTable.Remove(Key) Key : The argument key of deleting pairs The following source code shows all important operations in a HashTable VB.NET SourceCode Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim weeks As New Hashtable Dim day As DictionaryEntry weeks.Add("1", "Sun") weeks.Add("2", "Mon") weeks.Add("3", "Tue") weeks.Add("4", "Wed") weeks.Add("5", "Thu")

weeks.Add("6", "Fri") weeks.Add("7", "Sat") 'Display a single Item MsgBox(weeks.Item("5")) 'Search an Item If weeks.ContainsValue("Tue") Then MsgBox("Find") Else MsgBox("Not find") End If 'remove an Item weeks.Remove("3") 'Display all key value pairs For Each day In weeks MsgBox(day.Key " -- " day.Value) Next End Sub End Class