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【Asp.Net】一次上传多个文件

作者:Dezai.CN / 发布于2013/7/25/ 1120


	cs部分

	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 fileupload : 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(',');//文件描述
	 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 != ".rar" && fex != ".gif" && fex != ".doc")
	 {
	 strmsg.Append(Path.GetFileName(postedfile.FileName) + "---格式不对");
	 break;
	 }
	 }
	 }
	 if (strmsg.Length <= 0)
	 {
	 //以下为创建文件目录
	 string dirname = "pic00" + ddlAlbum.SelectedValue.Trim();
	 string dirpath = Server.MapPath("./") + "upload";
	 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 = "";
	 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文件
	 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
	 {
	 FileExtention = System.IO.Path.GetExtension(myFile.FileName);
	 string ppath = dirpath + @"/" + FileName + FileExtention;
	 myFile.SaveAs(ppath);
	 string FJname = FileName;
	
	 }
	 Response.Write(rd[i].ToString());
	 //写入数据库
	 //AddPicture(PicPath, rd[i], albumid);
	 }
	 }
	 else
	 {
	 lblMessage.Text = strmsg.ToString();
	 lblMessage.Visible = true;
	 }
	 }
	 }

	

	html部分

	<div style="font-size:9pt;">
	 
	 <table >
	 <tr valign="top">
	 <td >
	 请选择文件:</td>
	 <td ><div id="MyFile">
	 <input id="File1" type="file" name="File" runat="server" style="width: 250px" onchange="uploadSelect($(this));"/> 描述:<input name="text" type="text" style="width: 150px" maxlength="20" /></div></td>
	 <td style="width: 100px">
	 <input onclick="addFile()" type="button" value="增加文件"/></td>
	 </tr>
	 <tr>
	 <td >
	 指定文件夹:</td>
	 <td >
	 <asp:DropDownList ID="ddlAlbum" runat="server" Width="98px">
	 </asp:DropDownList>
	 <asp:Button ID="btnUpload" runat="server" Text="上传" OnClick="btnUpload_Click" /> </td>
	 <td >
	 <asp:Label ID="lblMessage" runat="server" Font-Bold="True" ForeColor="Red"></asp:Label></td>
	 </tr>
	 </table>
	 </div>

	

	js部分

	<script type="text/javascript">
	 var i=1
	 function addFile()
	 {
	
	 if (i<6)
	 {var str = ' <input type="file" name="File" runat="server" style="width: 250px"/>描述:<input name="text" type="text" style="width: 150px" maxlength="20" /><br/>'
	 document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)
	
	 }
	 else
	 {
	 alert("您一次最多只能上传6个文件！")
	 }
	 i++
	 }
	 var uploadSelect = function(el){
	 el.fadeOut("show");
	 parent.uploading(document.getElementById("<%=File1.ClientID %>").value);
	 $("#<%=frmUpload.ClientID %>").submit();
	 };
	 </script>

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