ASP.NET实现图片以二进制的形式存入数据库_实用技巧_

 USE [niunantest] GO /****** 对象: Table [dbo].[picdata] 脚本日期: 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] 

 int len = fu.PostedFile.ContentLength; // 图片大小 byte[] pic = new byte[len]; // 创建一个字节数组，大小为图片的大小，数据库中就存储这个东西 fu.PostedFile.InputStream.Read(pic, 0, len); // 把上传控件中的文件用二进制读取存到pic字节数组中 // 插入图片到数据库中 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 = "图片插入数据库成功！"; Image1.ImageUrl = "getpic.ashx?t=" + DateTime.Now.Ticks; // 显示刚刚插入数据库的图片 } finally { connection.Close(); } 

 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(); }