USE [niunantest] 
GO 
/****** 對象: Table [dbo].[picdata]  腳本日期: 03/30/2010 14:51:58 ******/ 
SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 
CREATE TABLE [dbo].[picdata]( 
  [id] [int] IDENTITY(1,1) NOT NULL, 
  [content] [image] NULL, 
  [createdate] [datetime] NOT NULL CONSTRAINT [DF_picdata_createdate] DEFAULT (getdate()), 
 CONSTRAINT [PK_picdata] PRIMARY KEY CLUSTERED  
( 
  [id] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]

2.下面是保存圖片到數據庫中的代碼片段：

int len = fu.PostedFile.ContentLength; // 圖片大小 
byte[] pic = new byte[len]; // 創(chuàng)建一個字節(jié)數組，大小為圖片的大小，數據庫中就存儲這個東西 
fu.PostedFile.InputStream.Read(pic, 0, len); // 把上傳控件中的文件用二進制讀取存到pic字節(jié)數組中 
//  插入圖片到數據庫中    
SqlConnection connection = new 
SqlConnection(@"server=.\sqlexpress;database=niunantest;uid=sa;pwd=123456"); 
try 
{ 
  connection.Open(); 
  SqlCommand cmd = new SqlCommand("insert  into  picdata  " 
  + "([content])  values  (@pic)", connection); 
  cmd.Parameters.Add("@pic", pic); 
  cmd.ExecuteNonQuery(); 
  Label1.Text = "圖片插入數據庫成功！"; 
 
  Image1.ImageUrl = "getpic.ashx?t=" + DateTime.Now.Ticks; // 顯示剛剛插入數據庫的圖片 
} 
finally 
{ 
  connection.Close(); 
}

3.下面是從數據庫中取出圖片的代碼片段：

MemoryStream stream = new MemoryStream(); 
SqlConnection connection = new 
SqlConnection(@"server=.\sqlexpress;database=niunantest;uid=sa;pwd=123456"); 
try 
{ 
  connection.Open(); 
  SqlCommand command = new 
  SqlCommand("select top 1 [content]  from  picdata order by id desc", connection); 
  byte[] image = (byte[])command.ExecuteScalar(); 
  stream.Write(image, 0, image.Length); 
  Bitmap bitmap = new Bitmap(stream); 
  context.Response.ContentType = "image/jpeg"; 
  bitmap.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg); 
} 
finally 
{ 
  connection.Close(); 
  stream.Close(); 
}

程序的原理其實也就是通過流把圖片搞成字節(jié)數組再存到數據庫中，然后再從數據庫中讀取字節(jié)數組出來，再通過字節(jié)數組創(chuàng)建流，再通過流把圖像輸出出來，發(fā)現(xiàn)你存到數據庫中的是gif圖像的話再取出來是可以把他轉為jpg的圖像的，因為在取出圖像的時候我們設置他的ContentType是image/jpeg了。

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