Programming Tutorials

Name Value Collecion in VB.net

By: Issac Printer Friendly Format    

There is one datastructure in .net that is very similar to Hash table it is called as Name Value collection, which is used to store data in a unique format Name, Value format, Hash table stores in Key, value format but NameValueCollection can hold more than one value for a reference key.

Adding new pairs
Add (ByVal name As String, ByVal value As String) 
Add ("Rudran","80")
Get the value of corresponding Key
GetValues(ByVal name As String) As String() 
String values() = GetValues("Rudran")
Imports System.Collections.Specialized

Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Button1.Click

Dim markStatus As New NameValueCollection
Dim key As String
Dim values() As String

markStatus.Add("A+", "80")
markStatus.Add("First Class", "60")
markStatus.Add("Average", "50")
markStatus.Add("Pass", "40")

For Each key In markStatus.Keys
values = markStatus.GetValues(key)
For Each value As String In values
MsgBox(key & " - " & value)
Next value
Next key

End Sub
End Class

When you run this code you will get a key/value set which can be check the mark status of the students.