把图片以二进制方式存入sql server数据库并读取出来（.net）
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1、建所需数据库和表，语句如下：
--建立数据库 create database test --使用该数据库 use test --建立存放图片的表 create table piclist( id int Identity primary key, pic Image not null ) 2、制作上传图片的模块，代码如下： 前台html代码： <%@ Page Language="C#" AutoEventWireup="true" CodeFile="UpPhoto.aspx.cs" Inherits="Test_UpPhoto" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>无标题页</title> </head> <body> <form id="form1" runat="server"> <div> <input id="UpPhoto" name="UpPhoto" runat="server" type="file" /> <asp:Button id="btnAdd" runat="server" Text="上传" OnClick="btnAdd_Click"></asp:Button> </div> </form> </body> </html> 后台代码： using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; 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.IO; using System.Data.SqlClient; public partial class Test_UpPhoto : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } protected void btnAdd_Click(object sender, EventArgs e) { //获得图象并把图象转换为byte[] HttpPostedFile upPhoto = UpPhoto.PostedFile; int upPhotoLength = upPhoto.ContentLength; byte[] PhotoArray = new Byte[upPhotoLength]; Stream PhotoStream = upPhoto.InputStream; PhotoStream.Read(PhotoArray, 0, upPhotoLength); //连接数据库 string ConStr = "server=(local);user id=sa;pwd=sa;database=test"; SqlConnection conn = new SqlConnection(ConStr); string strSql = "Insert into piclist(pic) values(@pic)"; SqlCommand cmd = new SqlCommand(strSql, conn); cmd.Parameters.Add("@pic", SqlDbType.Image); cmd.Parameters["@pic"].Value = PhotoArray; conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); Response.Write("图片上传成功"); } } 3、制作显示图片的模块： 后台代码： using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; 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.Data.SqlClient; using System.IO; public partial class Test_ShowPhoto : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if(!Page.IsPostBack) { //连接数据库 string ConnStr = "server=(local);user id=sa;pwd=sa;database=test"; string strSql = "select * from piclist"; SqlConnection conn = new SqlConnection(ConnStr); conn.Open(); SqlCommand cmd=new SqlCommand(strSql,conn); SqlDataReader reader = cmd.ExecuteReader(); while (reader.Read()) { Response.ContentType = "application/octet-stream"; Response.BinaryWrite((Byte[])reader["pic"]); Response.Write("successful"); } reader.Close(); conn.Close(); Response.End(); } } } |
