How to protect pdf file from copying, saving and downloading in c#.net

Question

Hi all, Plz help me i want to user cannot copy,save and download the pdf or html file from the application. user just open and read the document not either else he can do with file. Thanks in advance

Satyapriya Nayak · Answer

Hi Da, File download after a valid login. Default.aspx code Untitled Page Text="Download Oracle9i" BackColor="#80FFFF" ForeColor="Black" Width="133px" Font-Bold="True"/> Default.aspx.cs code using System; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void Button1_Click(object sender, EventArgs e) { Response.Redirect("Default2.aspx?file=" + "Oracle.pdf"); } } Default2.aspx code Untitled Page Default2.aspx.cs code using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; public partial class Default2 : System.Web.UI.Page { string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; DataSet ds = new DataSet(); SqlCommand cmd = new SqlCommand(); protected void Page_Load(object sender, EventArgs e) { if (Session["username"] == null && Session["Password"] == null) { Response.Redirect("login.aspx"); } else { string strRequest = Request.QueryString["file"]; if (strRequest != "") { //get absolute path of the file // the file is passed like a web address /images/myimage.jpg string path = Server.MapPath(strRequest); //get file object as FileInfo System.IO.FileInfo file = new System.IO.FileInfo(path); //-- if the file exists on the server if (file.Exists) //set appropriate headers { Response.Clear(); Response.AddHeader("Content-Disposition", "attachment; filename=" + file.Name); Response.AddHeader("Content-Length", file.Length.ToString()); Response.ContentType = "application/octet-stream"; // write file to browser Response.WriteFile(file.FullName); Response.End(); } else { // if file does not exist Response.Write("This file does not exist."); } } else { //nothing in the URL as HTTP GET Response.Write("Please provide a file to download."); } } } } login.aspx code Untitled Page ControlToValidate="TextBox1" ErrorMessage="Required User name"> ControlToValidate="TextBox2" ErrorMessage="Required Password"> Width="100px" /> login.aspx.cs code using System; using System.Collections; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; public partial class login : System.Web.UI.Page { string connStr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; DataSet ds = new DataSet(); SqlCommand cmd = new SqlCommand(); SqlConnection con; protected void Button1_Click(object sender, EventArgs e) { con = new SqlConnection(connStr); con.Open(); string str = "select UserName,Password from Login"; cmd = new SqlCommand(str, con); SqlDataReader reader; reader = cmd.ExecuteReader(); Session["username"] = TextBox1.Text ; Session["Password"] = TextBox2.Text; while (reader.Read()) { if ((Session["username"].ToString() == reader["UserName"].ToString()) & (Session["Password"].ToString() == reader["Password"].ToString())) { Response.Redirect("Default.aspx"); } else { Label3.Text="Invalid username or password"; } } } } Thanks