实现ASP.NET中FileUpload多文件上传

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实现ASP.NET中FileUpload多文件上传
这里附加一下上传单个文件的CS代码:

protected void upload_Click(object sender, EventArgs e)
    {

        if (upfile.HasFile)
        {
            string fname = upfile.PostedFile.FileName;
            int fi = fname.LastIndexOf("//") + 1;
            string filename = fname.Substring(fi);
            upfile.PostedFile.SaveAs(Server.MapPath("upload//" + filename));
            Response.Write("<script>alert('报名表上传成功!');</script>");
        }
        else
        {
            Response.Write("<script>alert('请选择您要上传的报名表!');</script>");
        }

    }

下面是上传多个文件的全部代码,第一次实现这样的功能,难免有考虑不周全的地方,还望高手见到后指教!

【显示页面代码】:

在<head></head>标签中插入如下脚本代码:

<script type="text/javascript">
         function addfile()
         {
          var uploadfiles=document.getElementById("uploadfiles"),str = '<INPUT type="file" size="50" NAME="File">';
          uploadfiles.innerHTML+=str;
         }
</script>

在页面主体部分插入:

<div>
     <p id="uploadfiles"><input type="file" size="50" name="file"></p>
     <input onclick="addfile()" type="button" value="增加">
     <asp:button id="uploadbutton" Text="开始上传" Runat="server"></asp:button>
</div>

【C#代码】:

添加using指令:using System.Text.RegularExpressions;

在protected void Page_Load(object sender, EventArgs e){}中插入如下代码:

HttpFileCollection files = HttpContext.Current.Request.Files;
        //状态信息
        System.Text.StringBuilder strMsg = new System.Text.StringBuilder();
        for (int ifile = 0; ifile < files.Count; ifile++)
        {
            HttpPostedFile postedfile = files[ifile];
            string filename, fileExt;
            filename = System.IO.Path.GetFileName(postedfile.FileName);    //获取文件名
            fileExt = System.IO.Path.GetExtension(filename);    //获取文件后缀

            int MaxAllowUploadFileSize = Convert.ToInt32(System.Configuration.ConfigurationSettings.AppSettings["MaxAllowUploadFileSize"]);     //定义允许上传文件大小
            if (MaxAllowUploadFileSize == 0) { MaxAllowUploadFileSize = 26500; }
            string allowexts = System.Configuration.ConfigurationSettings.AppSettings["AllowUploadFileType"];    //定义允许上传文件类型
            if (allowexts == "") { allowexts = "doc|docx|rar|xls|xlsx|txt"; }
            Regex allowext = new Regex(allowexts);

            if (postedfile.ContentLength < MaxAllowUploadFileSize && allowext.IsMatch(fileExt)) //检查文件大小及扩展名
            {
                postedfile.SaveAs(Server.MapPath("upload//" + filename + fileExt));    //upload为与本页面同一目录,可自行修改
            }
            else
            {
                Response.Write("<script>alert('不允许上传类型" + fileExt + "或文件过大')</script>");
            }
        }

【Web.config中代码】:

<appSettings>
    <add key="MaxAllowUploadFileSize" value="256000" />
    <add key="AllowUploadFileType" value="doc|docx|rar|xls|xlsx|txt" />
</appSettings>
 

 

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