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<%@ Page Language="C#" MasterPageFile="~/tpl/Demo.Master" AutoEventWireup="true" CodeBehind="Lock-Presentation.aspx.cs" Inherits="Lock_Presentation.Lock_Presentation" Title="Presentation Locking - Aspose.Slides" %>
<asp:Content ID="Content1" ContentPlaceHolderID="HeaderContent" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
	<table width="90%" align="center" cellspacing="0" cellpadding="0" border="0">
		<tr>
			<td height="41" valign="top">
				<img src="/Common/images/heading_lft.jpg" width="19" height="41" /></td>
			<td width="100%" class="demos-heading-bg">
				<h2 class="demos-heading-bg">
					&nbsp;Presentation Locking / Unlocking Demo - Aspose.Slides for .NET</h2>
			</td>
			<td valign="top">
				<img src="/Common/images/heading_rt.jpg" width="19" height="41" /></td>
		</tr>
	</table>
		<p class="componentDescriptionTxt">
		The sample demo makes use of locking feature provided by Aspose.Slides for .NET. Click <strong>Browse</strong> button to select the 
		PowerPoint 97-2003 format presentation (PPT) and then click <strong>Download Locked Presentation</strong> button to download the locked
        Presentation. Once a presentation is locked, it can only be unlocked by Aspose.Slides for .NET as MS PowerPoint can not lock / unlock a
        Presentation. Press <strong>Download Unlocked Presentation</strong> button to unlock a presentation after browsing the locked presentation.
	</p>

    Enter your PowerPoint Presentation (PPT)<asp:FileUpload ID="FileUpload1" runat="server" Width="389px">
</asp:FileUpload><br />

                    <asp:Label ID="Label1" runat="server" ForeColor="Red" Width="401px" Font-Bold="True"></asp:Label>

                



    <asp:Button ID="btn_Download" runat="server" OnClick="btn_Download_Click" Text="Download Locked Presentation" />&nbsp;<asp:Button
        ID="btn_Unlock" runat="server" OnClick="btn_Unlock_Click" Text="Download Unlocked Presentation"
        Width="266px" /><br />
    &nbsp;
</asp:Content>

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using Aspose.Slides;
namespace Lock_Presentation
{
    public partial class Lock_Presentation : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void btn_Download_Click(object sender, EventArgs e)
        {
            this.Label1.Visible = false;
            if (this.FileUpload1.HasFile)
            {
                    string strFile = this.FileUpload1.FileName.Substring(0,this.FileUpload1.FileName.Length-4) + DateTime.Now.ToString("hhmmss") + ".ppt";
                    this.FileUpload1.PostedFile.SaveAs(Server.MapPath(strFile));
                    Presentation pres = null;
                    try
                    {
                        pres = lockPPT(new Presentation(Server.MapPath(strFile)));
                    }
                    catch (UnsupportedFormatException ex)
                    {
                        this.Label1.Visible = true;
                        this.Label1.Text = ex.Message;
                        return;
                    }
                    downloadPPT(pres, strFile);
            }
        }
        public void downloadPPT(Presentation pres, string strFileName)
        {
            pres.Save(strFileName,Aspose.Slides.Export.SaveFormat.Ppt,Response,false);
            Response.End();        
        }
        public Presentation lockPPT( Presentation pres )
        {
            foreach (Slide sld in pres.Slides)
                foreach (Shape shp in sld.Shapes)
                    shp.Protection = ShapeProtection.LockSelect;
            return pres;
        }
        public Presentation unlockPPT(Presentation pres)
        {
            foreach (Slide sld in pres.Slides)
                foreach (Shape shp in sld.Shapes)
                    shp.Protection = ShapeProtection.Unlocked;
            return pres;
        }

        protected void btn_Unlock_Click(object sender, EventArgs e)
        {
            if (this.FileUpload1.HasFile)
            {
                string strFile = this.FileUpload1.FileName.Substring(0, this.FileUpload1.FileName.Length - 4) + DateTime.Now.ToString("hhmmss") + ".ppt";
                this.FileUpload1.PostedFile.SaveAs(Server.MapPath(strFile));
                Presentation pres = null;
                try
                {
                    pres = unlockPPT(new Presentation(Server.MapPath(strFile)));
                }
                catch (UnsupportedFormatException ex)
                {
                    this.Label1.Visible = true;
                    this.Label1.Text = ex.Message;
                    return;
                }
                downloadPPT(pres,strFile);
            }
        }
    }
}