读写图像

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Drawing;
using System.Data.SqlClient;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Configuration;
using System.IO;

....

....

    protected void photoOutFromDB_Click(object sender, EventArgs e)
    {
        Response.ContentType = "image/jpg";
        byte[] p = Photos();
        Response.BinaryWrite(p);
       
    }

    private byte[] Photos()
    {
        byte[] pho=new byte[50];

        SqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["sqlStr-pwd"]);
        SqlCommand com = conn.CreateCommand();
        com.CommandType = CommandType.Text;
        com.CommandText = "select photo from photoes where id=1";
        conn.Open();
        SqlDataReader dr = com.ExecuteReader();
        while (dr.Read())
        {
            pho = new byte[(int)((byte[])dr[0]).Length];
            pho =(byte[])dr[0];
        }
        dr.Close();
        conn.Close();

        return pho;
    }
    protected void photoOutFormDisk_Click(object sender, EventArgs e)
    {
        Response.ContentType="image/gif";
        string sPath = @"F:/EForm/webprint/samples/webprint/2.gif";
        byte[] Buffer = GetPhotoByte(sPath);
        Response.BinaryWrite(Buffer);
    }

    private byte[] GetPhotoByte(string path)
    {
        long FileSize = 0;
        FileStream MyFileStream = new FileStream(path, FileMode.Open);
        FileSize = MyFileStream.Length;

        byte[] Buffer = new byte[(int)FileSize];
        MyFileStream.Read(Buffer, 0, (int)FileSize);
        MyFileStream.Close();
        return Buffer;
    }