多文件上传获取上传控件id的有关问题-ASP.NET教程-爱易网页

多文件上传获取上传控件id的有关问题

日期：2014-05-18　浏览次数：20425 次

多文件上传获取上传控件id的问题
前台：正文1：<input name='MainFile1' id='MainFile1' size='52' class='txt_normal' type='file'>
附件1：<input name='SecondFile1' id='SecondFile1' size='52' class='txt_normal' type='file'>
后台： HttpFileCollection files = HttpContext.Current.Request.Files;
问题是如何在后台利用HttpFileCollection files = HttpContext.Current.Request.Files;保存文件的时候获取input控件的id,因为分正文和附件分别存放。

------解决方案--------------------

C# code


前台:
<head runat="server">
    <title>无标题页</title>
    <script language="JavaScript">
  function addFile()
  {
      var str = '<BR><INPUT type="file" size="50" NAME="File" runat="server">'
      document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str)
  }
  </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <table class="fullwidth" align="center">
                        <TR>
        <TD vAlign="top">Attachment :</TD>
        <TD>
         <P id="MyFile"><input id="filMyFile" type="file" size="50" name="filMyFile">&nbsp;<input onclick="addFile()" type="button" value="Add"></P>
         <asp:label id="lblAttachmentError" runat="server" ForeColor="Red"></asp:label><BR>
         <asp:button id="btnUpload" runat="server" Text="Upload" OnClick="btnUpload_Click"></asp:button><asp:label id="lblAttachment" runat="server"></asp:label></TD>
       </TR>
</table>
    </div>
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /><br />
        <asp:Label ID="Label1" runat="server" Width="119px"></asp:Label>
    </form>
</body>

后台:
protected void btnUpload_Click(object sender, EventArgs e)
    {
        HttpFileCollection files = HttpContext.Current.Request.Files;
        for (int i = 0; i < files.Count; i++)
        {
            if (i < files.Count && i < 10)
            {
                if (files[i].FileName != "" || files[i] != null)
                {
                    int FileSize = 6 * 1024 * 1024;
                    HttpPostedFile myFile = files[i];
                    string strFilePath = myFile.FileName.ToString().Trim();
                    this.lblAttachmentError.Text = "<" + strFilePath + ">"; // Show file name 
                    int nFindSlashPos = strFilePath.Trim().LastIndexOf("\\") + 1;
                    string UploadFileName = strFilePath.Substring(nFindSlashPos);
                    string FileName = string.Format("{0:yyMMdd}", DateTime.Now) + "-" + UploadFileName;

                    if (myFile.FileName.Trim() == "") // Empty value in Browse Box
                    {
                        this.lblAttachmentError.Text = "No file selected.";
                        return;
                    }

                    if (myFile.ContentLength != 0)
                    {
                        if (myFile.ContentLength > FileSize)
                        {
                            this.lblAttachmentError.Text = "File Size is limited to 6 MB only.";
                            return;
                        }
                        this.lblAttachment.Text += "<BR>" + FileName;
                        this.lblAttachmentError.Text = "";
                        myFile.SaveAs(@"D:\" + FileName);

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多文件上传获取上传控件id的有关问题

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