Store data with Hashtable using ASP.NET 2.0 and C#

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

using 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 void btn_get_Click(object sender, EventArgs e) { int key; string name = string.Empty; string str = string.Empty; Hashtable 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); foreach (DictionaryEntry de in hashtable) { str = str + "key=" + de.Key + " " + " value=" + de.Value.ToString() + "<br>"; } this.Label1.Text = str; }

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The front end StoreDataWithHashtableCsharp.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

using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Collections; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { // 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 } protected void btn_get_Click(object sender, EventArgs e) { int key; string name = string.Empty; string str = string.Empty; Hashtable 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); foreach (DictionaryEntry de in hashtable) { str = str + "key=" + de.Key + " " + " value=" + de.Value.ToString() + "<br>"; } this.Label1.Text = str; } }

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