[Solved] Display and Print multiple Barcode Images in ASP.Net

Here I have created sample that full fills your requirement. In this i have just put the DataList in Panel and then printed that panel.

HTML

<div>
    <script type="text/javascript">
        function GridData() {
            var panel = document.getElementById("<%=pnlContents.ClientID %>");
            panel.border = 0;
            var prtwin = window.open('', 'PrintGridViewData', 'left=100,top=100,width=1000,height=1000,tollbar=0,scrollbars=1,status=0,resizable=1');
            prtwin.document.write(panel.outerHTML);
            prtwin.document.close();
            prtwin.focus();
            prtwin.print();
            prtwin.close();
            return false;
        }
    </script>
    <asp:Panel ID="pnlContents" runat="server">
        <asp:DataList ID="dlData" runat="server" RepeatColumns="4" CellPadding="4" OnItemDataBound="dlData_ItemDataBound">
            <ItemTemplate>
                <table cellpadding="2" cellspacing="0" border="1" style="width: 20px; height: 33px;
                    background-color: White" id="Tabl">
                    <tr align="center">
                        <td align="center">
                            <b>Bramandam<u><span> </span></u></b>
                        </td>
                    </tr>
                    <tr align="center">
                        <td align="center">
                            <asp:Label ID="secionname" runat="server" Text='<%#Eval("sectionname") %>'></asp:Label>
                        </td>
                    </tr>
                    <tr align="center">
                        <td align="center">
                            <asp:Label ID="lotno" runat="server" Text='<%#Eval("lotno") %>' Visible="false"></asp:Label><asp:PlaceHolder
                                ID="plBarCode" runat="server" />
                        </td>
                    </tr>
                    <tr align="center">
                        <td align="center">
                            <asp:Label ID="lonoo" runat="server" Text='<%#Eval("lotno") %>' Visible="false"></asp:Label>
                        </td>
                    </tr>
                    <tr align="center">
                        <td align="center">
                            <asp:Label ID="rate" runat="server" Text='<%#Eval("rate") %>'></asp:Label>
                        </td>
                    </tr>
                    </td>
                </table>
            </ItemTemplate>
        </asp:DataList>
    </asp:Panel>
    <asp:Button ID="Button1" runat="server" Text="Print" OnClientClick="return GridData()" />
</div>

Code

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[4] { new DataColumn("Id", typeof(int)),
                    new DataColumn("sectionname", typeof(string)),
                    new DataColumn("rate",typeof(decimal)),
                        new DataColumn("lotno",typeof(int))});
        dt.Rows.Add(1, "Plastic", 25.00, 123);
        dt.Rows.Add(2, "Elastic", 30.00, 126);
        dt.Rows.Add(3, "Plastic", 50.00, 130);
        dt.Rows.Add(4, "Elastic", 60.00, 150);
        dt.Rows.Add(5, "Elastic", 40.00, 160);
        dt.Rows.Add(6, "Plastic", 100.00, 170);
        dt.Rows.Add(7, "Elastic", 120.00, 180);
        dt.Rows.Add(8, "Plastic", 130.00, 190);
        // string qre = "select sectionname,rate,lotno from purchasedummy";          
        dlData.DataSource = dt;
        dlData.DataBind();
    }
}

protected void dlData_ItemDataBound(object sender, DataListItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        string barCode = (e.Item.FindControl("lotno") as Label).Text;
        System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();
        using (Bitmap bitMap = new Bitmap(barCode.Length * 40, 80))
        {
            using (Graphics graphics = Graphics.FromImage(bitMap))
            {
                Font oFont = new Font("Elfring Bar Code 39 d Hb", 28);
                PointF point = new PointF(2f, 2f);
                SolidBrush blackBrush = new SolidBrush(Color.Black);
                SolidBrush whiteBrush = new SolidBrush(Color.White);
                graphics.FillRectangle(whiteBrush, 0, 0, bitMap.Width, bitMap.Height);
                graphics.DrawString("*" + barCode + "*", oFont, blackBrush, point);
            }
            using (MemoryStream ms = new MemoryStream())
            {
                bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                byte[] byteImage = ms.ToArray();

                Convert.ToBase64String(byteImage);
                imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
            }
            (e.Item.FindControl("plBarCode") as PlaceHolder).Controls.Add(imgBarCode);
        }
    }
}

Screenshot

I hope this will help you out.