Extract Unzip Files in Zip Folder in Asp.net using C#, VB.NET

By: Suresh Dasari Apr 17, 2013

Introduction:

Here I will explain how to extract or unzip files in zip folder in asp.net using C#, VB.NET.

Description:

In previous articles I explained create zip files in asp.net, Delete files from uploaded folder in asp.net, create/delete directory in asp.net, Ajax ConfirmbuttonExtender example with modalpopup, Joins in SQL Server and many articles relating to Gridview, SQL ,jQuery,asp.net, C#,VB.NET. Now I will explain how to extract unzip files from zip folder in asp.net 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 -à Right click on it and go to Add ASP.NET folder -à 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 unzip files from zip folder

<head>

<title>Extract or Unzip files from Zip folder in Asp.net using c#,vb.net</title>

</head>

<body>

<div>

<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:Button ID="btnUnZip" Text="Extract Zip Files" runat="server" onclick="btnunZip_Click" /><br />

<asp:Label ID="lbltxt" runat="server" Font-Bold="true" ForeColor="Red" />

</div>

<div>

<asp:GridView ID="gvDetails" CellPadding="5" runat="server" AutoGenerateColumns="false">

<asp:BoundField DataField="FileName" HeaderText="FileName" />

<asp:BoundField DataField="CompressedSize" HeaderText="Compressed Size" />

<asp:BoundField DataField="UnCompressedSize" HeaderText="UnCompressed Size" />

</Columns>

</asp:GridView>

</div>

</form>

</body>

</html>

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)

{

if (fileUpload1.HasFile)

{

string filename = Path.GetFileName(fileUpload1.PostedFile.FileName);

string path = Server.MapPath("~/SampleFiles/" + filename);

fileUpload1.SaveAs(path);

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())

{

zip.AddFiles(filenames, "files");

zip.Save(Server.MapPath("~/samplefiles.zip"));

lbltxt.Text = "ZIP File Created Successfully";

}

// UnZip all files from folder

protected void btnunZip_Click(object sender, EventArgs e)

{

string path = Server.MapPath("~/SampleFiles.zip");

using (ZipFile zip = ZipFile.Read(path))

{

zip.ExtractAll(Server.MapPath("~/ExtractFiles"),ExtractExistingFileAction.DoNotOverwrite);

gvDetails.DataSource = zip;

gvDetails.DataBind();

lbltxt.Text = "Files Extracted Successfully and it contains following files";

}

VB.NET Code

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)

fileUpload1.SaveAs(path_1)

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")

zip.Save(Server.MapPath("~/samplefiles.zip"))

lbltxt.Text = "ZIP File Created Successfully"

End Using

End Sub

' UnZip all files from folder

Protected Sub btnunZip_Click(ByVal sender As Object, ByVal e As EventArgs)

Dim path As String = Server.MapPath("~/SampleFiles.zip")

Using zip As ZipFile = ZipFile.Read(path)

zip.ExtractAll(Server.MapPath("~/ExtractFiles"), ExtractExistingFileAction.DoNotOverwrite)

gvDetails.DataSource = zip

gvDetails.DataBind()

lbltxt.Text = "Files Extracted Successfully and it contains following files"

End Using

End Sub

End Class

Demo

To test application first upload files after that next click on create zip folder button after that click on Extract Zip Files button and check your directory for the files