I want to load image on page load from sql database using session. images are stored in one folder of solution and the path of that images is stored in database column.

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I have used ashx file and its code is below.

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data;
using System.Data.SqlClient;
using System.Data.Sql;

namespace tables
{
    /// <summary>
    /// Summary description for Handler1
    /// </summary>
    public class Handler1 : IHttpHandler
    {
        SqlConnection con = new SqlConnection("Data Source=jayraj-pc\\sqlexpress;Initial Catalog=Internship;Integrated Security=True;Pooling=False");


        public void ProcessRequest(HttpContext context)
        {
            string sql = "select CompanyLogo from Companies";
            SqlCommand command = new SqlCommand(sql, con);
            SqlDataReader dReader = command.ExecuteReader();
            dReader.Read();
            context.Response.BinaryWrite((byte[])dReader["~/CompanyLogo/"]);
            dReader.Close();
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

I have used image control to display image. datatype of image path in database column is nvarchar(max). its code is

C#

namespace tables
{
    public partial class CompanyProfile : System.Web.UI.Page
    {
        SqlConnection con = new SqlConnection("Data Source=jayraj-pc\\sqlexpress;Initial Catalog=Internship;Integrated Security=True;Pooling=False");

        protected void Page_Load(object sender, EventArgs e)
        {

            if (Convert.ToInt16(Session["CompanyID"].ToString()) > 0)
            {
                con.Open();
                SqlCommand cmd = new SqlCommand("select * from Companies where CompanyID=" + Session["CompanyID"], con);
                SqlDataAdapter da = new SqlDataAdapter(cmd);
              
              
                DataSet ds = new DataSet();
                 
                da.Fill(ds, "Companies");
              
                if (ds.Tables[0].Rows.Count > 0)
                {
                   

                    Image1.ImageUrl = "Handler1.ashx";
                  

                }
            }
        }
    }
}

Posted 18-Mar-14 20:22pm

jayraj86

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pradiprenushe · Answer 1 · 2014-03-18T23:12:00

Firstly why you are you using handler? you can do this directly

C#

if (ds.Tables[0].Rows.Count > 0)
     {
      Image1.ImageUrl ="~/"+ ds.Tables[0].Rows[0]["CompanyLogo "].ToString();
     }

By using handler

In page add company id in qyerystring

C#

Image1.ImageUrl = "Handler1.ashx?Companyid="Convert.ToInt16(Session["CompanyID"].ToString());

In hander change you sql query as follows

C#

public void ProcessRequest(HttpContext context)
        {
            string sql = @"select CompanyLogo from Companies where CompanyID=" + context.Request.QueryString["Companyid"].ToString();
            SqlCommand command = new SqlCommand(sql, con);
            SqlDataReader dReader = command.ExecuteReader();
            dReader.Read();
context.Response.ContentType = "image/png";
context.Response.WriteFile("~/" + dReader["CompanyLogo"].ToString());            
            dReader.Close();
        }