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Create ZIP Files in C#, VB.NET | ZIP Files Archive in ASP.Net

Apr 17, 2013

Here I will explain how to create zip files in using C#, VB.NET. To create zip archive files in using C#, VB.NET we have one library called DotNetZip library by this we can easily create zip files.


In previous articles I explained Delete files from uploaded folder in, create/delete directory in, display rows as columns in, Interview questions, Joins in SQL Server and many articles relating to Gridview, SQL ,jQuery,, C#,VB.NET. Now I will explain how to create zip files in using C# and VB.NET.

To implement this first we need to get Ionic.Zip.dll from DotnetZIP Library for that check this link Ionic.Zip.dll or you can get it from attached downloadable code. Now you need to add that dll to your application bin folder for that check below steps

Go to Solution Explorer --> Right click on it and go to Add ASP.NET folder --> click on Bin

Now bin folder added to our application and place Ionic.Zip.dll in that folder and add another folder in your application (Right click on your application -à Select New folder) and give name as SampleFiles

Once you added dll and SampleFiles folder our application will be like this

Now write the following code to upload files and zip files

<html xmlns="">
<title>Create ZIP Files in using c#,</title>
<form id="form1" runat="server">
<asp:FileUpload ID="fileUpload1" runat="server" />
<asp:Button ID="btnUpload" runat="server" Text="Upload Files" onclick="btnUpload_Click" />
<asp:Button ID="btnZip" Text="Create Zip Files" runat="server" onclick="btnZip_Click" />
<asp:Label ID="lbltxt" runat="server" Font-Bold="true" ForeColor="Red" />
Now in code behind add the following namespaces

C# Code

using System;
using System.IO;
using Ionic.Zip;
Once you add namespaces write the following code in code behind

// insert files in folder
protected void btnUpload_Click(object sender, EventArgs e)
string filename = Path.GetFileName(fileUpload1.PostedFile.FileName);
string path = Server.MapPath("~/SampleFiles/" + filename);
lbltxt.Text = "File Uploaded Successfully";
// Zip all files from folder
protected void btnZip_Click(object sender, EventArgs e)
string path = Server.MapPath("~/SampleFiles/");
string[] filenames = Directory.GetFiles(path);
using (ZipFile zip = new ZipFile())
lbltxt.Text = "ZIP File Created Successfully";

Imports System.IO
Imports Ionic.Zip
Partial Class VBCode
Inherits System.Web.UI.Page
' insert files in folder
Protected Sub btnUpload_Click(ByVal sender As Object, ByVal e As EventArgs)
If fileUpload1.HasFile Then
Dim filename As String = Path.GetFileName(fileUpload1.PostedFile.FileName)
Dim path__1 As String = Server.MapPath("~/SampleFiles/" & filename)
lbltxt.Text = "File Uploaded Successfully"
End If
End Sub
' Zip all files from folder
Protected Sub btnZip_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim path As String = Server.MapPath("~/SampleFiles/")
Dim filenames As String() = Directory.GetFiles(path)
Using zip As New ZipFile()
zip.AddFiles(filenames, "files")
lbltxt.Text = "ZIP File Created Successfully"
End Using
End Sub
End Class

Download Sample Code Attached

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Anonymous said...

Anonymous said...


Unknown said...


This is very useful for me.Because actually it works only in framework 4.5 but by using this code we can use in any framework.

Anonymous said...

is there any way we can do this without using the upload feature

Anonymous said...

Great Help, works like Charm !!
Thank you very much.

Mayank Desai said...

Hi Suresh,
How to create zipfile without using upload feature ? How to create zip when my file data stored in database column? Please help me..

Anuradha said...

Will it work automatically just by reference while deploying on test/live server? said...

This is very helpfull to all of freshers, Thanks for beeing your Code Mr.SureshDasari

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