asp.net多图片上传实现程序代码

  前台代码如下:

  

复制代码 代码如下:

  <% @ Page Language="C#" CodeFile="UploadImg.aspx.cs" Inherits="NetAdmin_APicture_UploadImg" %>

  <!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>

  <script type="text/javascript">

  var i=1

  function addFile()

  {

  if (i<8)

  {var str = '<BR> <input type="file" name="File" runat="server" style="width: 300px"/>描述:<input name="text" type="text" style="width: 150px" maxlength="20" />'

  document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)

  }

  else

  {

  alert("您一次最多只能上传8张图片!")

  }

  i++

  }

  </script>

  <link href="http://www.hzhuti.com/" rel="stylesheet" type="text/css" />

  </head>

  <body style="background-image: url(../images/bg.jpg); text-align: center">

  <form id="form1" runat="server">

  <div>

  <table id="Table1" align="center" border="0" cellpadding="1" cellspacing="1" class="table"

  style="height: 58px" width="620">

  <tr>

  <td align="center" background="../images/topbg1.jpg">

  <font color="#0000ff" face="宋体" size="3"><strong>上传图片</strong></font></td>

  </tr>

  <tr>

  <td align="center">

  </td>

  </tr>

  <tr>

  <td align="center">

  <asp:Panel ID="Panel5" runat="server" Width="608px">

  <table width="100%">

  <tr>

  <td align="right" style="width: 100px">

  </td>

  <td align="left">

  说明:点增加图片按钮可一次上传多张图片,可为每张图片写上一句不超过20个字的描述.单张图片大小不大于1024k</td>

  </tr>

  <tr>

  <td align="right" style="width: 100px">

  请选择图片:<br />

  </td>

  <td align="left"><P id="MyFile"><INPUT onclick="addFile()" type="button" value="增加图片(Add)"><br />

  <input type="file" name="File" runat="server" style="width: 300px"/>

  描述:<input name="text" type="text" style="width: 150px" maxlength="20" />

  </td>

  </tr>

  <tr>

  <td align="right" style="width: 100px">

  上传到的图库:</td>

  <td align="left">

  <asp:DropDownList ID="ddlAlbum" runat="server" DataSourceID="SqlDataSource1"

  DataTextField="AlbumName" DataValueField="AlbumID">

  </asp:DropDownList><asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:WebJakeCS %>"

  SelectCommand="SELECT [AlbumID], [AlbumName] FROM [WB_Album] ORDER BY [AlbumID] DESC">

  </asp:SqlDataSource>

  </td>

  </tr>

  <tr>

  <td align="right" style="width: 100px">

  </td>

  <td align="left">

  <asp:Button ID="btnUpload" runat="server" Text="开始上传" OnClick="btnUpload_Click" />

  </td>

  </tr>

  <tr>

  <td align="right" style="width: 100px">

  </td>

  <td align="left">

  <asp:Label ID="lblMessage" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label></td>

  </tr>

  </table>

  </asp:Panel>

  </td>

  </tr>

  <tr>

  <td align="center">

  <font face="宋体"></font><font face="宋体"> </font>

  </td>

  </tr>

  <tr>

  <td align="center">

  <font face="宋体"></font>

  </td>

  </tr>

  </table>

  </div>

  </form>

  </body>

  </html>

  后台代码如下:

  

复制代码 代码如下:

  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;

  public partial class NetAdmin_APicture_UploadImg : System.Web.UI.Page

  ...{

  protected void Page_Load(object sender, EventArgs e)

  ...{

  }

  protected void btnUpload_Click(object sender, EventArgs e)

  ...{

  lblMessage.Text = "";

  lblMessage.Visible = false;

  System.Web.HttpFileCollection files = System.Web.HttpContext.Current.Request.Files;

  System.Text.StringBuilder strmsg = new System.Text.StringBuilder("");

  string[] rd = Request.Form[1].Split(',');//获得图片描述的文本框字符串数组,为对应的图片的描述

  string albumid=ddlAlbum.SelectedValue.Trim();

  int ifile;

  for (ifile = 0; ifile < files.Count; ifile++)

  ...{

  if (files[ifile].FileName.Length > 0)

  ...{

  System.Web.HttpPostedFile postedfile = files[ifile];

  if (postedfile.ContentLength / 1024 > 1024)//单个文件不能大于1024k

  ...{

  strmsg.Append(Path.GetFileName(postedfile.FileName) + "---不能大于1024k<br>");

  break;

  }

  string fex = Path.GetExtension(postedfile.FileName);

  if (fex != ".jpg" && fex != ".JPG" && fex != ".gif" && fex != ".GIF")

  ...{

  strmsg.Append(Path.GetFileName(postedfile.FileName) + "---图片格式不对,只能是jpg或gif<br>");

  break;

  }

  }

  }

  if (strmsg.Length <= 0)//说明图片大小和格式都没问题

  ...{

  //以下为创建图库目录

  string dirname = "pic00" + ddlAlbum.SelectedValue.Trim();

  string dirpath = Server.MapPath("http://www.iiwnet.com/php");

  dirpath = dirpath + "" + dirname;

  if (Directory.Exists(dirpath) == false)

  ...{

  Directory.CreateDirectory(dirpath);

  }

  Random ro = new Random();

  int name = 1;

  for (int i = 0; i < files.Count; i++)

  ...{

  System.Web.HttpPostedFile myFile = files[i];

  string FileName = "";

  string FileExtention = "";

  string PicPath = "";

  FileName = System.IO.Path.GetFileName(myFile.FileName);

  string stro=ro.Next(100,100000000).ToString()+name.ToString();//产生一个随机数用于新命名的图片

  string NewName =DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString()+DateTime.Now.Millisecond.ToString()+stro;

  if (FileName.Length > 0)//有文件才执行上传操作再保存到数据库

  ...{

  FileExtention = System.IO.Path.GetExtension(myFile.FileName);

  string ppath = dirpath + "" + NewName + FileExtention;

  myFile.SaveAs(ppath);

  string FJname = FileName;

  PicPath = "PicBase" + "" + dirname + "" + NewName + FileExtention;

  }

  AddPicture(PicPath, rd[i], albumid);//将图片信息保存到数据库

  if (name == 1)//如果为每次更新的第一张图片,则将它更新为象册的封面

  ...{

  upFirstimg(albumid, PicPath);

  }

  name = name + 1;//用来重命名规则的变量

  }

  }

  else

  ...{

  lblMessage.Text = strmsg.ToString();

  lblMessage.Visible = true;

  }

  }

  private void AddPicture(string imgpath,string imgnote,string albumid)

  ...{

  string sql = "insert WB_AlbumImges(ImgPath,ImgNote,AlbumID) values('"+imgpath+"','"+imgnote+"','"+albumid+"')";

  DB mydb = new DB();

  mydb.RunProc(sql);

  }

  private void upFirstimg(string albumid,string firstimg)

  ...{

  string sql = "update WB_Album set FirstImg='"+firstimg+"' where AlbumID="+albumid;

  DB mydb = new DB();

  mydb.RunProc(sql);

  }

  }