前台shangchuan.aspx代码:<%@ Page language="c#" Codebehind="shangchuan.aspx.cs" AutoEventWireup="false" Inherits="hualong.allknow.shangchuan" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>shangchuan</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <BODY bgcolor="#ffffff"> <FORM ENCTYPE="multipart/form-data" RUNAT="server" ID="Form1"> <TABLE RUNAT="server" WIDTH="700" ALIGN="left" ID="Table1" cellpadding="0" cellspacing="0" border="0"> <TR> <TD>上传图片(选择你要上传的图片)</TD> <TD> <INPUT TYPE="file" RUNAT="server" STYLE="WIDTH:320px" ACCEPT="text/*" NAME="up_file" id="up_file"> </TD> </TR> <TR> <TD> 文件说明(添加上传图片说明，如：作者、出处) </TD> <TD> <asp:TextBox RUNAT="server" WIDTH="239" ID="txtDescription" MAINTAINSTATE="false" /> </TD> </TR> <TR> <TD> <asp:Label RUNAT="server" ID="txtMessage" FORECOLOR="red" MAINTAINSTATE="false" /> </TD> <TD> <asp:Button RUNAT="server" WIDTH="239" TEXT="Upload Image" ID="Button1" /> </TD> </TR> </TABLE> </FORM> </BODY></HTML>
下面是后台shangchuan.aspx.cs代码:using System;using System.Web;using System.IO;using System.Data;using System.Data.SqlClient;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;
namespace hualong.allknow{ /// <summary> /// shangchuan 的摘要说明。 /// </summary> public class shangchuan : System.Web.UI.Page { protected System.Web.UI.WebControls.TextBox txtDescription; protected System.Web.UI.WebControls.Label txtMessage; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.HtmlControls.HtmlInputFile up_file; protected Int32 fileLength = 0; private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 }
#region Web 窗体设计器生成的代码 override protected void OnInit(EventArgs e) { // // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.Button1.Click += new System.EventHandler(this.Button1_Click); this.Load += new System.EventHandler(this.Page_Load);
} #endregion
private void Button1_Click(object sender, System.EventArgs e) { HttpPostedFile upFile = up_file.PostedFile;//HttpPostedFile对象,用来读取上传图片的属性 fileLength = upFile.ContentLength;//记录文件的长度 try { if(fileLength==0)//当文件长度为0的时候 { txtMessage.Text = "请选择要上传的文件!"; } else { byte[] fileByte = new byte[fileLength];//用图片的长度来初始化一个字节数组存储临时的图片文件 Stream fileStream = upFile.InputStream;//建立文件流对象 fileStream.Read(fileByte,0,fileLength);//读取图片数据到临时存储体fileByte,0为数据指针位置,fileLength为数据长度 string connString = "Data Source=192.168.1.250;database=image;uid=pwqzc;pwd=cn0088"; SqlConnection conn = new SqlConnection(connString);//初始化数据库连接 string insertStr = "insert into image (image_data,image_content_type,image_description,image_size) values (@image_data,@image_content_type,@image_description,@image_size)"; //插入数据库语句 SqlCommand comm = new SqlCommand(insertStr,conn); comm.Parameters.Add(new SqlParameter("@image_data",SqlDbType.Image));//添加参数 comm.Parameters["@image_data"].Value = fileByte;//给参数赋值 comm.Parameters.Add(new SqlParameter("@image_content_type",SqlDbType.VarChar,50)); comm.Parameters["@image_content_type"].Value = upFile.ContentType;//记录图片类型 comm.Parameters.Add(new SqlParameter("@image_description",SqlDbType.VarChar,50)); comm.Parameters["@image_description"].Value = txtDescription.Text;//把其他的表单数据上传 comm.Parameters.Add(new SqlParameter("@image_size",SqlDbType.Int,4)); comm.Parameters["@image_size"].Value = upFile.ContentLength;//记录图片长度,读取数据的时候使用 conn.Open();//打开数据库连接 comm.ExecuteNonQuery();//添加数据 conn.Close();//关闭数据库 txtMessage.Text = "你已经成功的上传了图片"; } } catch(Exception ex) { txtMessage.Text = ex.Message.ToString(); } } }}下面是读取代码:using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Data.SqlClient;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;
namespace hualong.allknow{ /// <summary> /// readimage 的摘要说明。 /// </summary> public class readimage : System.Web.UI.Page { private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 int imgId = int.Parse(Request.QueryString["imgId"]);//imgId为图片的id //建立数据库连接 string connString = "server=192.168.1.250;database=image;uid=pwqzc;pwd=cn0088"; SqlConnection conn = new SqlConnection(connString); //数据库操作语句 string selString = "select * from image where image_id = @image_id"; SqlCommand comm = new SqlCommand(selString,conn); comm.Parameters.Add(new SqlParameter("@image_id",SqlDbType.Int,4)); comm.Parameters["@image_id"].Value = imgId; conn.Open();//打开数据库连接 SqlDataReader dr = comm.ExecuteReader();//读出数据 dr.Read();//读一行 //设定输出文件的类型 Response.ContentType = (string)dr["image_content_type"]; //输出图片文件二进制数据 Response.OutputStream.Write((byte[])dr["image_data"],0,(int)dr["image_size"]); Response.End(); dr.Close(); conn.Close(); }
#region Web 窗体设计器生成的代码 override protected void OnInit(EventArgs e) { // // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.Load += new System.EventHandler(this.Page_Load);
} #endregion }}下面是显示代码xianshi.aspx:<%@ Page language="c#" Codebehind="xianshi.aspx.cs" AutoEventWireup="false" Inherits="hualong.allknow.xianshi" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>xianshi</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <img src="readimage.aspx?imgId=1"> </form> </body></HTML>
