asp.net c#从SQL2008读取图片显示到网页

//图像数据表:tx
//字段id (nvarchar(50)  ,image(image)
//tgav为图片ID,实质为上传前的主名 (省略了.jpg)

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class hander : System.Web.UI.Page
{
    public override void ProcessRequest(HttpContext context)
    {
        string id = context.Request.QueryString["id"];
        SqlConnection conn = new SqlConnection("server=MY\\SQLEXPRESS;uid=sa;pwd=*****;database=exaddddm");
        SqlCommand cmd = new SqlCommand("select image from tx where id=@id", conn);
        cmd.Parameters.Add("@id", SqlDbType.NVarChar);
        cmd.Parameters["@id"].Value = id;

        conn.Open();
        SqlDataReader dr = cmd.ExecuteReader();
        if (dr.Read())
        {
            context.Response.BinaryWrite((byte[])dr["image"]);
        }
        dr.Close();
    }
    protected void Page_Load(object sender, EventArgs e)
    {

    }
}

新建上面的网页保存为hander.aspx

其他页面的图片URL连接地址如下:

<td class="auto-style26" rowspan="5" style="text-align: left">
<asp:Image ID="tx1" runat="server" Height="160px" Width="400px" ImageUrl='<%# "hander.aspx?id="+Eval("tx") %>' Visible='<%# Eval("tx").ToString()!=null ?true:false %>' AlternateText='<%# " " %>' />
</td>