iframe一个页面操作完成后给父页面赋值

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<td width="680"> <img alt="" src="../images/detail_no_pic.gif" mce_src="images/detail_no_pic.gif" width="1" height="1" id="txtHI_OutdoorImage3" /> <asp:TextBox ID="txtHI_OutdoorImage0" runat="server" Width="40px" Style="display: none;" mce_Style="display: none;"></asp:TextBox> <asp:TextBox ID="txtHI_OutdoorImage1" runat="server" Width="40px" Style="display: none;" mce_Style="display: none;"></asp:TextBox> <asp:TextBox ID="txtHI_OutdoorImage2" runat="server" Width="40px" Style="display: none;" mce_Style="display: none;"></asp:TextBox> <iframe src="../UserControls/upload.aspx?txtid=txtHI_OutdoorImage&savefile=<%=savefile %>" frameborder="0" height="30" allowtransparency="true" scrolling="no"></iframe> <span class="red">*</span> </td> protected void btnUpload_Click(object sender, EventArgs e) { //判断是否有选中文件 if (!fileUpload.HasFile) { ETHaiNan.Common.JScript.Alert("没有选择文件"); return; } string strId = ETHaiNan.Common.StringUtil.GetSaftString(Request.QueryString["txtid"]).Trim(); string strSaveFile = ETHaiNan.Common.StringUtil.GetSaftString(Request.QueryString["savefile"]).Trim();//上传的文件夹 //返回图片路径（含图片文件名），图片大小，图片最后修改时间，输出结果方便调试 string[] arrResult = ImageFTP.FtpUp(fileUpload, strSaveFile); //Response.Write("路径：" + arrResult[0].ToString() + "<br />"); //Response.Write("大小：" +arrResult[1].ToString() + "<br >"); //Response.Write("时间：" + arrResult[2].ToString()); string strJs = "<mce:script type="text/javascript"></mce:script>"; Page.RegisterClientScriptBlock("ok",strJs); }