ASP.NET

protected void Page_Load(object sender, EventArgs e)
        {
            Investigator _objInvestigator = new Investigator();
            InvestigatorService _objinvestigatorService = new InvestigatorService();

            int InvestigatorId;
            InvestigatorId = ((Session["InvestigatorId"] != null) && int.TryParse(Session["InvestigatorId"].ToString(), out InvestigatorId)) ? InvestigatorId : 0;
            _objInvestigator = _objinvestigatorService.GetByInvestigatorId(InvestigatorId);
            if (_objInvestigator != null)
            {
                if ((_objInvestigator.CvFile != null) && !string.IsNullOrEmpty(_objInvestigator.CvFileNameWithExt))
                {
                    String ext = System.IO.Path.GetExtension(_objInvestigator.CvFileNameWithExt);

                        Response.ContentType = "application/" + ext;
                        Response.AddHeader("content-length", _objInvestigator.CvFile.Length.ToString());
                        Response.BinaryWrite(_objInvestigator.CvFile);

                }
            }

        }  

protected void loadFile_Click(object sender, EventArgs e)
       {
           Response.Write(string.Format("<script>window.open('{0}','_blank');</script>", "TheFile.aspx"));
       }

Investigator _objInvestigator = new Investigator();
            InvestigatorService _objinvestigatorService = new InvestigatorService();

            int InvestigatorId;
            InvestigatorId = ((Session["InvestigatorId"] != null) && int.TryParse(Session["InvestigatorId"].ToString(), out InvestigatorId)) ? InvestigatorId : 0;
            _objInvestigator = _objinvestigatorService.GetByInvestigatorId(InvestigatorId);
            if (_objInvestigator != null)
            {
                if ((_objInvestigator.CvFile != null) && !string.IsNullOrEmpty(_objInvestigator.CvFileNameWithExt))
                {
                    String ext = System.IO.Path.GetExtension(_objInvestigator.CvFileNameWithExt);

                    //string path = Server.MapPath("~\E:\karthikeyan\venky\pdf\aaaa.PDF");
                    //WebClient client = new WebClient();
                    //Byte[] buffer = client.DownloadData(path);
                    //if (buffer != null)
                    //{

                    if (ext.ToLower() == ".doc")
                    {
                        Response.ContentType = "application/" + "msword";
                        Response.AddHeader("content-length", _objInvestigator.CvFile.Length.ToString());
                        Response.BinaryWrite(_objInvestigator.CvFile);
                    }
                    else if(ext.ToLower() == ".docx")
                    {
                        Response.ContentType = "application/" + "vnd.openxmlformats-officedocument.wordprocessingml.document";
                        Response.AddHeader("content-length", _objInvestigator.CvFile.Length.ToString());
                        Response.BinaryWrite(_objInvestigator.CvFile);
                    }
                    else if (ext.ToLower() == ".pdf")
                    {
                        Response.ContentType = "application/" + ext;
                        Response.AddHeader("content-length", _objInvestigator.CvFile.Length.ToString());
                        Response.BinaryWrite(_objInvestigator.CvFile);
                    }

                }
            }

public static model_image_object smtpHeader_resize(string pName, byte[] pBytes)
{
    // Target Width / Height
    // Headers are 650px in width, and suppose to be 146px in height
    const int t_Width = 650;
    const int t_Height = 146;

    // Create the return Image Object
    model_image_object pResult = new model_image_object();
    MemoryStream ms_out = new MemoryStream();
    MemoryStream ms_in = new MemoryStream(pBytes);
    Image requestObj = Image.FromStream(ms_in);

    // Figure out what we need to do to resize this image
    int oWidth = requestObj.Width;
    int oHeight = requestObj.Height;
    int cHeight = 0;
    int cWidth = 0;

    // Create the canvas for the new reponseObj
    Image bitmapObj = new Bitmap(t_Width, t_Height, PixelFormat.Format24bppRgb);

    // Create the new response Image, that will overlay the Bitmap
    using (Graphics graphicObj = Graphics.FromImage(bitmapObj))
    {
        graphicObj.Clear(Color.Transparent);
        graphicObj.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.Default;
        graphicObj.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

        // Calculate the new Height and Width of the Image
        if (oWidth > t_Width)
        {
            cWidth = t_Width;
            cHeight = (int)Math.Round((oHeight / (float)oWidth) * t_Width);
        }
        else if (oHeight > t_Height)
        {
            cHeight = t_Height;
            cWidth = (int)Math.Round((oWidth / (float)oHeight) * t_Height);
        }

        // Calculate how to overlay the width of the image centered
        int xLeft = (cWidth - t_Width) / 2;
        int xTop = (cHeight - t_Height) / 2;

        // Create the new Image Object
        graphicObj.DrawImage(bitmapObj, xLeft, xTop, t_Width, t_Height);

        // Create a new MemoryStream to Save the Image to<br />
        bitmapObj.Save(ms_out, ImageFormat.Png);
    }

    // Program the pResult
    pResult.Data = ms_out.ToArray();
    pResult.Name = pName;
    pResult.Type = "image/png";
    pResult.Size = new model_image_type_size();
    pResult.Size.Height = cHeight;
    pResult.Size.Width = cWidth;

    return pResult;
}   

public static model_image_object smtpHeader_resize(string pName, byte[] pBytes)
{
    // Target Width / Height
    // Headers are 650px in width, and suppose to be 146px in height
    const int t_Width = 650;
    const int t_Height = 146;

    // Create the return Image Object
    model_image_object pResult = new model_image_object();
    Stream stream_in = new MemoryStream(pBytes);
    MemoryStream ms_out = new MemoryStream();

    // Create an Image so we can get the image parameters
    Image image_in = Image.FromStream(stream_in);

    // Write this to the drive and visually inspect it
    image_in.Save(System.Web.HttpContext.Current.Server.MapPath("~/Images/smtp/image_in.png"));

    // Figure out what we need to do to resize this image
    int oWidth = image_in.Width;
    int oHeight = image_in.Height;
    int cHeight = 0;
    int cWidth = 0;

    // Create the canvas for the new resized image
    Bitmap bitmapObj = new Bitmap(t_Width, t_Height, PixelFormat.Format24bppRgb);            

    // Create the new graphics, that will overlay the Bitmap Canvas
    using (Graphics graphicObj = Graphics.FromImage(bitmapObj))
    {
        graphicObj.Clear(Color.Transparent);
        graphicObj.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.Default;
        graphicObj.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

        // Calculate the new Height and Width of the Image
        if (oWidth > t_Width)
        {
            cWidth = t_Width;
            cHeight = (int)Math.Round((oHeight / (float)oWidth) * t_Width);
        }
        else if (oHeight > t_Height)
        {
            cHeight = t_Height;
            cWidth = (int)Math.Round((oWidth / (float)oHeight) * t_Height);
        }

        // Calculate how to overlay the width of the image centered
        int x = (cWidth - t_Width) / 2;
        int y = (cHeight - t_Height) / 2;

        // Create the new Image Object
        graphicObj.DrawImage(image_in, x, y, t_Width, t_Height);
        graphicObj.Save();
    }            

    // Now write the image_out to test it and make sure it's correct<br />
    bitmapObj.Save(System.Web.HttpContext.Current.Server.MapPath("~/Images/smtp/bitmap_out.png"));

    // Create a new MemoryStream to Save the Image to
    bitmapObj.Save(ms_out, ImageFormat.Png);            

    // Program the pResult
    pResult.Data = ms_out.ToArray();
    pResult.Name = pName;
    pResult.Type = "image/png";
    pResult.Size = new model_image_type_size();
    pResult.Size.Height = cHeight;
    pResult.Size.Width = cWidth;

    return pResult;
    }        

}