Introduction:
Description:
In
previous articles I explained create zip files in asp.net, unzip files from folder in asp.net, Get Gridview row values when checkbox
selected in asp.net, Delete files from uploaded folder in
asp.net,
create/delete directory in asp.net and many articles
relating to Gridview, SQL, jQuery, asp.net, C#, VB.NET. Now I will explain how
to upload and download multiple files as zip files folder from server in asp.net using C#, 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
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Now
write the following code to upload files and download selected files as zip
folder from gridview
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Download Multiple Files as zip files archive in Asp.net
using c#,vb.net</title>
</head>
<body>
<form id="form1"
runat="server">
<div>
<asp:FileUpload ID="fileUpload1"
runat="server"
/>
<asp:Button ID="btnUpload"
runat="server"
Text="Upload
Files" onclick="btnUpload_Click" />
<br />
<asp:Label ID="lbltxt"
runat="server"
Font-Bold="true"
ForeColor="Red"
/>
</div>
<asp:GridView ID="gvDetails"
CellPadding="5"
runat="server"
AutoGenerateColumns="false">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:CheckBox ID="chkSelect"
runat="server"
/>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Text" HeaderText="FileName" />
</Columns>
<HeaderStyle BackColor="#df5015" Font-Bold="true" ForeColor="White" />
</asp:GridView>
<asp:Button ID="btnDownload"
Text="Download
Selected Files" runat="server" onclick="btnDownload_Click" />
</form>
</body>
</html>
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Now in code behind add the following namespaces
C#
Code
using System;
using System.Collections.Generic;
using System.IO;
using System.Web.UI.WebControls;
using Ionic.Zip;
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Once you add namespaces write the following code in
code behind
protected void
Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
BindGridview();
}
}
// Bind Data to Gridview
protected void
BindGridview()
{
string[] filesPath = Directory.GetFiles(Server.MapPath("~/SampleFiles/"));
List<ListItem>
files = new List<ListItem>();
foreach (string path
in filesPath)
{
files.Add(new
ListItem(Path.GetFileName(path)));
}
gvDetails.DataSource = files;
gvDetails.DataBind();
}
// 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";
BindGridview();
}
}
// Zip all files from folder
protected void btnDownload_Click(object sender, EventArgs
e)
{
using (ZipFile
zip = new ZipFile())
{
foreach (GridViewRow
gvrow in gvDetails.Rows)
{
CheckBox chk = (CheckBox)
gvrow.FindControl("chkSelect");
if(chk.Checked)
{
string fileName= gvrow.Cells[1].Text ;
string filePath = Server.MapPath("~/SampleFiles/" + fileName);
zip.AddFile(filePath, "files");
}
}
Response.Clear();
Response.AddHeader("Content-Disposition",
"attachment;
filename=DownloadedFile.zip");
Response.ContentType = "application/zip";
zip.Save(Response.OutputStream);
Response.End();
}
}
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VB.NET
Code
Imports System.Collections.Generic
Imports System.IO
Imports System.Web.UI.WebControls
Imports Ionic.Zip
Partial Class VBCode
Inherits System.Web.UI.Page
Protected Sub
Page_Load(ByVal sender As Object, ByVal e As
EventArgs) Handles Me.Load
If Not IsPostBack Then
BindGridview()
End If
End Sub
' Bind Data to Gridview
Protected Sub
BindGridview()
Dim filesPath As String() = Directory.GetFiles(Server.MapPath("~/SampleFiles/"))
Dim files As New List(Of
ListItem)()
For Each path__1 As String In filesPath
files.Add(New
ListItem(Path.GetFileName(path__1)))
Next
gvDetails.DataSource = files
gvDetails.DataBind()
End Sub
' 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"
BindGridview()
End If
End Sub
' Zip all files from folder
Protected Sub
btnDownload_Click(ByVal sender As Object, ByVal e As
EventArgs)
Using zip As New ZipFile()
For Each gvrow As GridViewRow In
gvDetails.Rows
Dim chk As CheckBox = DirectCast(gvrow.FindControl("chkSelect"), CheckBox)
If chk.Checked Then
Dim fileName As String = gvrow.Cells(1).Text
Dim filePath As String = Server.MapPath("~/SampleFiles/"
& fileName)
zip.AddFile(filePath, "files")
End If
Next
Response.Clear()
Response.AddHeader("Content-Disposition",
"attachment;
filename=DownloadedFile.zip")
Response.ContentType = "application/zip"
zip.Save(Response.OutputStream)
Response.[End]()
End Using
End Sub
End Class
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Demo
To
test application first upload files after that select available files in
gridview and click on Download Selected
Files button to generate zip file archive based on files whatever you
selected
 |
Download
Sample Code Attached
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10 comments :
Nice Articles
it nice name space problem
what can do plz help me
why you dont record videos and upload on youtube your blog is great but recording of videos is best way to explain try to look my advice.
thank you.
excellent
what will happen if am uploading files from different folders ?
nice article dude
Great Article boss.....
Raj me also getting name space problem
did u get the solution to it.if yes plz tell me also brother
or any other friends who are here can tell me at bilalbinamar@rediff.com
Nice one...Very Help full
You rock my friend :) It works perfectly, not many people believe in KISS rule now a days, you do :) Many thanks.
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