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Navigator: Home - Tutorials - Advanced Technologies - Store data with Hashtable using ASP.NET 2.0 and VB.NET
Store data with Hashtable using ASP.NET 2.0 and VB.NET

ASP.Net 4.0 Tutorials V4
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ASP.NET Advanced Technologies Tutorial

This tutorial will show you how to store data with Hashtable using ASP.NET 2.0 and VB.NET.

At first, you need to import the namespace from System.Collections.The System.Collections namespace contains classe Hashtable which represents a collection of key/value pairs that are organized based on the hash code of the key. 

Imports System.Collections

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In order to run the example, we will use the btn_get_Click to trigger the task. The code as following:

Protected Sub btn_get_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btn_get.Click
Dim key As Integer
Dim name As String = String.Empty
Dim str As String = String.Empty

Dim hashtable As Hashtable = New Hashtable()
key = 1
name = "Jake"
Hashtable.Add(key, name)
key = 2
name = "peter"
Hashtable.Add(key, name)
key = 3
name = "lily"
Hashtable.Add(key, name)

For Each de As DictionaryEntry In hashtable
str = str + "key=" + CType(de.Key, String) + " " + " value=" + de.Value.ToString() + "<br>"
Next de
Me.Label1.Text = str
End Sub

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The front end StoreDataWithHashtableVB.aspx page looks something like this:

<div align="left" style="text-align: center">
&nbsp;<table>
<tr>
<td colspan="2" style="width: 402px">
<asp:Label ID="Label1" runat="server"></asp:Label>
&nbsp;</td>
</tr>
<tr>
<td colspan="2" style="height: 26px; width: 402px;">
<asp:Button ID="btn_get" runat="server" Text="Get data from hashtable" OnClick="btn_get_Click"/></td>
</tr>
</table>
&nbsp;&nbsp;
</div>

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The flow for the code behind page is as follows

Imports System.Collections
Partial Class _Default

Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
' This tutorial is provided in part by Server Intellect Web Hosting Solutions http://www.serverintellect.com
' Visit http://www.AspNetTutorials.com for more ASP.NET Tutorials
End Sub

Protected Sub btn_get_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btn_get.Click
Dim key As Integer
Dim name As String = String.Empty
Dim str As String = String.Empty

Dim hashtable As Hashtable = New Hashtable()
key = 1
name = "Jake"
Hashtable.Add(key, name)
key = 2
name = "peter"
Hashtable.Add(key, name)
key = 3
name = "lily"
Hashtable.Add(key, name)

For Each de As DictionaryEntry In hashtable
str = str + "key=" + CType(de.Key, String) + " " + " value=" + de.Value.ToString() + "<br>"
Next de
Me.Label1.Text = str
End Sub
End Class

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