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-------------------------------------aspx-------------------------­

<table>­

<tr valign="top">­

        <td>附件</td>­

        <td>­

            <div style="float:left; width:30px">­

                 <input type="button" value="+" onclick="addFile()" />­

            </div>­

            <div id="divFile" style="float:left">­

                <div>­

                    <input type="file" style="width:400px" runat="server" name="files">­

                    <asp:Button ID="btnSubmit" runat="server" Text="提交" OnClick="btnSubmit_Click" />­

                </div>­

             </div>­

        </td>­

    </tr>­

</table>­

<script type="text/javascript">­

    function addFile()­

    {­

        var divFile = document.getElementById('divFile');­

        var fileCount = divFile.getElementsByTagName("div").length;­

        if(fileCount<5)//根据情况做个限制­

        {­

            var str = '<div><input type="file" style="width:400px" runat="server" name="files"><img id="imgAdd" src="../../Images/colj1.gif" onclick="deleteFile(this)" /></div>';­

         divFile.insertAdjacentHTML("beforeEnd",str);­

    }­

    else­

    {         ­

         alert("最多增加五个");­

    }­

    }­

    function deleteFile(child)­

    {­

        var divFile = document.getElementById("divFile");­

        divFile.removeChild(child.parentNode);­

    }­

</script>­

--------------------------------------aspx.cs------------------------------------­

protected void btnSubmit_Click(object sender, EventArgs e)­

    {­

        HttpFileCollection myFile = HttpContext.Current.Request.Files;­

        int iFileCount = myFile.Count;­

        lblShow.Text = iFileCount.ToString();­

         for (int i = 0; i < iFileCount; i++)&sh