Zip and download files from Folder based on name in ASP.Net using C# and VB.Net

Hi suhaas121,

Refer modified code.

protected void downimg_Click(object sender, EventArgs e)
{
    HiddenField2.Value = name();
    string svalue = HiddenField2.Value;
    string path = @"~/Source images/" + svalue ;
    string[] files = Directory.GetFiles(Server.MapPath(path));
    using (ZipFile zip = new ZipFile())
    {
        zip.AddFiles(files, "sourceImages");
        zip.Save(@"C:\Users\user\Desktop\sourceImages.zip");
    }
}

Check this example. Now please take its reference and correct your code.

HTML

<asp:TextBox runat="server" ID="txtvalue" CssClass="form-control" />
<asp:LinkButton ID="downimg" OnClick="downimg_Click" runat="server"
    CssClass="btn btn-primary btn-rounded btn-icon" Width="50px"
    ToolTip="Download images"><i class="fa fa-download"></i></asp:LinkButton>

Namespaces

C#

using System.IO;
using Ionic.Zip;

VB.Net

Imports System.IO
Imports Ionic.Zip

Code

C#

protected void downimg_Click(object sender, EventArgs e)
{
    string svalue = txtvalue.Text;
    string path = @"~/Source images/" + svalue;
    string[] files = Directory.GetFiles(Server.MapPath(path));
    using (ZipFile zip = new ZipFile())
    {
        zip.AddFiles(files, "sourceImages");
        zip.Save(@"C:\Users\user\Desktop\sourceImages_" + svalue.Replace(" ", "_") + ".zip");
    }
}

VB.Net 

Protected Sub downimg_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim svalue As String = txtvalue.Text
    Dim path As String = "~/Source images/" & svalue
    Dim files As String() = Directory.GetFiles(Server.MapPath(path))
    Using zip As ZipFile = New ZipFile()
        zip.AddFiles(files, "sourceImages")
        zip.Save("C:\Users\user\Desktop\sourceImages_" & svalue.Replace(" ", "_") & ".zip")
    End Using
End Sub