5
Answers

Need help resizing image

Hello, I'm currently building an wallpaper website. Therefore I need to have proper-looking thumbnails. The images in the database are 1920x1200, these images need to be properly resized to 384x240.
The following code is what I have so far. But it doesn't resize the image, could anyone implement the code that I need?

 <%@ WebHandler Language="C#" Class="ShowImage" %>

using System;
using System.Configuration;
using System.Web;
using System.IO;
using System.Data;
using System.Data.SqlClient;

public class ShowImage : IHttpHandler 
{
    public void ProcessRequest(HttpContext context)
    {
       Int32 empno;
       if (context.Request.QueryString["id"] != null)
            empno = Convert.ToInt32(context.Request.QueryString["id"]);
       else
            throw new ArgumentException("No parameter specified");
            
       context.Response.ContentType = "image/jpeg";
       Stream strm = ShowEmpImage(empno);
       byte[] buffer = new byte[4096];
       int byteSeq = strm.Read(buffer, 0, 4096);

       while (byteSeq > 0)
       {
           context.Response.OutputStream.Write(buffer, 0, byteSeq);
           byteSeq = strm.Read(buffer, 0, 4096);
       }        
       //context.Response.BinaryWrite(buffer);
    }

    public Stream ShowEmpImage(int empno)
    {
        SqlConnection connection = new SqlConnection(AllPublic.Connstring);
        string sql = "SELECT Wal1 FROM tbl_cars WHERE modId = @ID";
        SqlCommand cmd = new SqlCommand(sql,connection);
        cmd.CommandType = CommandType.Text;
        cmd.Parameters.AddWithValue("@ID", empno);
        connection.Open();
        object img = cmd.ExecuteScalar();
        try
        {
            return new MemoryStream((byte[])img);
        }
        catch 
        {
            return null;
        }
        finally
        {
            connection.Close();
        }
    }

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }


}

And on the asp-page the code looks like this:

            img_1.ImageUrl = "~/show/afb1.ashx?id=" + id;
            img_1.PostBackUrl = "~/show/afb1.ashx?id=" + id;

Thanks in advance,

Answers (5)