多文件上传代码,Asp.Net代码库,德仔网

代码语言
代码分类
【Asp.Net】多文件上传
作者:Dezai.CN / 发布于2013/4/25/ 505
多文件上传

	<script type="text/javascript">

	var i=1

	function addFile()

	{

	

	if (i<8)

	 {var str = '<BR> <input type="file" name="File" runat="server" style="width: 200px"/>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>

	

	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;

	

	namespace DuoWenJianShangChuan

	{

	 public partial class _Default : 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");

	 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");

	 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 dirpath = Server.MapPath("51aspx");

	

	 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 = "";

	 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);

	

	 }

	

	 name = name + 1;//用来重命名规则的变量

	

	 }

	

	 Response.Write("<script>alert('恭喜，图片上传成功！')</script>");

	 }

	 else

	 {

	 lblMessage.Text = strmsg.ToString();

	 lblMessage.Visible = true;

	 }

	 }

	

	 }

	

	 }

	}
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