// 涉及命名空间
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Web;
using System.Configuration;

// 方法
public void AddUser(string PersonName, string PersonEmail, string PersonSex, string PersonDOB, string PersonImage, string PersonImageType)
{
 string strImageType = userImage.PostedFile.ContentType;
 Stream ImageStream = userImage.PostedFile.InputStream;

// 加水印----------------->
 string wImageFile = Server.MapPath("/bkwww/image/HomeSign.gif"); // 要加的水印图
 Image sImage = Image.FromStream(ImageStream); // 从 Http 输入流创建 image
 Image wImage = Image.FromFile(wImageFile);

// 绘图
 Graphics g = Graphics.FromImage(sImage);
 g.DrawImage(wImage, new Rectangle(0, 0, wImage.Width, wImage.Height), 0, 0, wImage.Width, wImage.Height, GraphicsUnit.Pixel);
  
 // 保存，并将 image 转化为 byte[]
 MemoryStream ms=new MemoryStream();
 byte[] myImage=null;
 sImage.Save(ms, ImageFormat.Gif);
 myImage = ms.GetBuffer();
 //------------------------>

// 写入数据库 string strConn = ConfigurationSettings.AppSettings["ConnectionString"];
 SqlConnection myConnection = new SqlConnection(strConn);
 SqlCommand myCommand = new SqlCommand("sp_person_isp", myConnection);
 myCommand.CommandType = CommandType.StoredProcedure;

myCommand.Parameters.Add("@PersonEmail", SqlDbType.VarChar, 255).Value = PersonEmail;
 myCommand.Parameters.Add("@PersonName", SqlDbType.VarChar, 255).Value = PersonName;
 myCommand.Parameters.Add("@PersonSex", SqlDbType.Char, 1);
 if(sexMale.Checked)
 myCommand.Parameters["@PersonSex"].Value = "M";
 else
 myCommand.Parameters["@PersonSex"].Value = "F";
 myCommand.Parameters.Add("@PersonDOB", SqlDbType.DateTime).Value = PersonDOB;
 myCommand.Parameters.Add("@PersonImage", SqlDbType.Image).Value = myImage;
 myCommand.Parameters.Add("@PersonImageType", SqlDbType.VarChar, 255).Value = ImageType;

try
 {
 myConnection.Open();
 myCommand.ExecuteNonQuery();
 myConnection.Close();
 Response.Write("添加成功！");
 }
 catch(System.Exception SqlEx)
 {
 Response.Write("添加失败！"+SqlEx.ToString());
 }
}

/*
 54tiger.cnblogs.com
   Copyright(c) 2006 《八零年代》 Function:将上传的图片添加防伪图片水印，并将图片直接写入数据库，不保留在硬盘。
*/