Programming Tutorials

Name Value Collecion in VB.net

By: Issac  

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.

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