asp.net 母版页与子页 Form runat="server" 问题

迷茫的凡人 2014-05-27 12:02:00

现在有个子页面，套用了母版页，子页上面有个批量上传功能



  <table width="100%" border="0" cellspacing="0" cellpadding="0">

                    <tr id="trFile0">

                        <td width="24%" align="right">

                            <nobr>选择文件：</nobr>

                        </td>

                        <td width="76%">

                            <asp:FileUpload ID="FileUpload1" runat="server" CssClass="dx-in" Style="width: 200px;" />

                        </td>

                    </tr>

                    <tr>

                        <td align="right">

                             

                        </td>

                        <td>

                            <input type="button" value="继续添加" onclick="javascript:AddFile()" class="j-but" />

                            <input type="button" onclick="upReg()" value="导入" class="j-but" /><input type="button"

                                value="取消" onclick="closeRes();" class="j-but" />

                            <asp:Button ID="btnResContent" runat="server" Text="导入" OnClick="btnResContentSave_Click"

                                CssClass="j-but" Style="visibility: hidden" />

                        </td>

                    </tr>

                </table>

 function AddFile() {

            var fileNum = upRegFileNum + 1;

            var strFile = '<tr id="trFile' + fileNum + '"><td width="24%" align="right"> </td><td width="76%"><input id="File' + upRegFileNum + '" type="file" style="width:319px"  /></td></tr> ';

            document.getElementById("trFile" + upRegFileNum).insertAdjacentHTML("afterEnd", strFile);

            upRegFileNum += 1;

        }

使用js动态添加 input type=“file” Html控件，但是问题来了，后台获取不到动态添加的html控件



 HttpFileCollection Files = HttpContext.Current.Request.Files;

            //这里Files获取不到动态添加的html控件

            if (Files.Count > 0)

            {

                for (int i = 1; i < Files.Count; i++)

                {

 if (Files[i].InputStream.Length < 1)

                    {

                        ShowMessage("请选择文件");

                        return;

                    }

                    string ext = System.IO.Path.GetExtension(Files[i].FileName);

                    int FileLen = Files[i].ContentLength;//获取上传文件的大小

                    byte[] input = new byte[FileLen];

                    System.IO.Stream UpLoadStream = Files[i].InputStream;

                    UpLoadStream.Read(input, 0, FileLen);

                    UpLoadStream.Position = 0;

                    System.IO.StreamReader sr = new System.IO.StreamReader(UpLoadStream, System.Text.Encoding.Default);

                    txtContent.Text += sr.ReadToEnd() ;

                    sr.Close();

                    UpLoadStream.Close();

                }

            }