按要求提供Aspx页面
<%@ Page Title="" Language="C#" MasterPageFile="~/tier6a-educ.master" AutoEventWireup="true"
EnableEventValidation="false" CodeFile="TAP_rubform_response.aspx.cs" Inherits="TAP_rubform_response" %>
<asp:Content ID="Content1" ContentPlaceHolderID="test1" runat="server">
<head>
<link href="StyleSheet.css" type="text/css" rel="Stylesheet" />
</head>
<div style="padding-left: 10pt">
<form id="form1" runat="server">
<asp:Table ID="Table11" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow10" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell10" runat="server" ColumnSpan="2"><h4>SECTION 1: STANDARDS AND OBJECTIVES</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table38" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow11" runat="server">
<asp:TableCell ID="TableCell11" runat="server">
<asp:Label ID="Label22" runat="server">Rating </asp:Label>
<asp:Label ID="Label23" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow34" runat="server">
<asp:TableCell ID="TableCell44" runat="server">
<asp:Label ID="Label48" runat="server">Evidence </asp:Label>
<asp:Label ID="Label49" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table12" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow12" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell12" runat="server" ColumnSpan="2"><h4>SECTION 2: Presenting Instructional Content</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table2" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow13" runat="server">
<asp:TableCell ID="TableCell15" runat="server">
<asp:Label ID="Label20" runat="server">Rating </asp:Label>
<asp:Label ID="Label21" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow39" runat="server">
<asp:TableCell ID="TableCell49" runat="server">
<asp:Label ID="Label58" runat="server">Evidence </asp:Label>
<asp:Label ID="Label59" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table13" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow14" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell13" runat="server" ColumnSpan="2"><h4>SECTION 3: Lesson Structure and Pacing</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table3" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow15" runat="server">
<asp:TableCell ID="TableCell18" runat="server">
<asp:Label ID="Label24" runat="server">Rating </asp:Label>
<asp:Label ID="Label25" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow35" runat="server">
<asp:TableCell ID="TableCell45" runat="server">
<asp:Label ID="Label50" runat="server">Evidence </asp:Label>
<asp:Label ID="Label51" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table14" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow16" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell14" runat="server" ColumnSpan="2"><h4>SECTION 4: Activities and Materials </h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table4" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow17" runat="server">
<asp:TableCell ID="TableCell21" runat="server">
<asp:Label ID="Label26" runat="server">Rating </asp:Label>
<asp:Label ID="Label27" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow36" runat="server">
<asp:TableCell ID="TableCell46" runat="server">
<asp:Label ID="Label52" runat="server">Evidence </asp:Label>
<asp:Label ID="Label53" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table21" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow18" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell16" runat="server" ColumnSpan="2"><h4>SECTION 5: Academic Feedback</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table5" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow19" runat="server">
<asp:TableCell ID="TableCell24" runat="server">
<asp:Label ID="Label28" runat="server">Rating </asp:Label>
<asp:Label ID="Label29" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow37" runat="server">
<asp:TableCell ID="TableCell47" runat="server">
<asp:Label ID="Label54" runat="server">Evidence </asp:Label>
<asp:Label ID="Label55" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table26" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow20" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell59" runat="server" ColumnSpan="2"><h4>SECTION 6: Grouping Students</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table6" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow21" runat="server">
<asp:TableCell ID="TableCell27" runat="server">
<asp:Label ID="Label30" runat="server">Rating </asp:Label>
<asp:Label ID="Label31" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow38" runat="server">
<asp:TableCell ID="TableCell48" runat="server">
<asp:Label ID="Label56" runat="server">Evidence </asp:Label>
<asp:Label ID="Label57" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table32" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow40" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell71" runat="server" ColumnSpan="2"><h4>SECTION 7: Teacher Content Knowledge</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table7" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow23" runat="server">
<asp:TableCell ID="TableCell30" runat="server">
<asp:Label ID="Label32" runat="server">Rating </asp:Label>
<asp:Label ID="Label33" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow24" runat="server">
<asp:TableCell ID="TableCell31" runat="server">
<asp:Label ID="Label34" runat="server">Evidence </asp:Label>
<asp:Label ID="Label35" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table39" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow42" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell91" runat="server" ColumnSpan="2"><h4>SECTION 8: Questioning</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table8" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow26" runat="server">
<asp:TableCell ID="TableCell34" runat="server">
<asp:Label ID="Label36" runat="server">Rating </asp:Label>
<asp:Label ID="Label37" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow27" runat="server">
<asp:TableCell ID="TableCell35" runat="server">
<asp:Label ID="Label38" runat="server">Evidence </asp:Label>
<asp:Label ID="Label39" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table45" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow50" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell105" runat="server" ColumnSpan="2"><h4>SECTION 9: Thinking</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table9" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow29" runat="server">
<asp:TableCell ID="TableCell38" runat="server">
<asp:Label ID="Label40" runat="server">Rating </asp:Label>
<asp:Label ID="Label41" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow30" runat="server">
<asp:TableCell ID="TableCell39" runat="server">
<asp:Label ID="Label42" runat="server">Evidence </asp:Label>
<asp:Label ID="Label43" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table50" runat="server" Height="16px" Width="845px">
<asp:TableRow ID="TableRow56" runat="server" orderColor="Gray" BorderWidth="1pt"
BorderStyle="Dotted" HorizontalAlign="Center">
<asp:TableCell ID="TableCell117" runat="server" ColumnSpan="2"><h4>SECTION 10: Problem Solving</h4></asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="table10" runat="server" HorizontalAlign="center" BorderColor="Gray"
BorderWidth="1pt" BorderStyle="Dotted" Width="850px" Style="line-height: 15pt"
Font-Names="Trebuchet MS" Font-Size="11pt">
<asp:TableRow ID="TableRow32" runat="server">
<asp:TableCell ID="TableCell42" runat="server">
<asp:Label ID="Label44" runat="server">Rating </asp:Label>
<asp:Label ID="Label45" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
<asp:TableRow ID="TableRow33" runat="server">
<asp:TableCell ID="TableCell43" runat="server">
<asp:Label ID="Label46" runat="server">Evidence </asp:Label>
<asp:Label ID="Label47" Font-Bold="true" runat="server"> </asp:Label>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
<asp:Table ID="Table15" runat="server" BorderColor="Gray" BorderWidth="1pt" BorderStyle="Dotted"
Width="850px" HorizontalAlign="Center">
<asp:TableRow ID="TableRow48" runat="server">
<asp:TableCell ID="TableCell101" HorizontalAlign="left" ColumnSpan="1" runat="server"
Font-Size="Large">
<asp:Button ID="Button1" Text="Send As e-Mail" runat="server" OnClick="SendAsEmail_Click"
Font-Size="10pt" Height="18pt" Width="90pt" ValidationGroup="onsubmit" />
</asp:TableCell>
<asp:TableCell ID="TableCell19" HorizontalAlign="center" ColumnSpan="1" runat="server"
Font-Size="Large">
<asp:Button ID="Button3" Text="Save As PDF" runat="server" OnClick="SaveAsPDF_Click"
Font-Size="10pt" Height="18pt" Width="90pt" ValidationGroup="onsubmit" />
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</form>
</div>
</asp:Content>
我有一个aspx页面，里面有一个按钮，当用户点击页面时，它会以电子邮件的形式发送给用户。
这是我为按钮的点击功能编写的代码
protected void SendasEmail_Click(object sender, EventArgs e)
{
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
this.Page.RenderControl(hw);
SmtpClient smtpClient = new SmtpClient();
MailMessage message = new MailMessage();
MailAddress fromAddress = new MailAddress("xxxxx");
smtpClient.Host = "xxxxxxx";
smtpClient.Port = 25;
message.From = fromAddress;
message.To.Add("xxxxxx");
message.Subject = "The webpage is below";
message.IsBodyHtml = true;
message.Body = sw.ToString();
smtpClient.Send(message);
}
我可以收到电子邮件，但在执行页面后，会显示以下错误。
我绝对只有页面内的表单，因为如果上面的函数的实现是空的，我不会得到任何错误。网页加载正常，单击按钮不会执行任何操作。
一个页面只能有一个服务器端表单标记。
描述：执行当前Web请求期间发生了未处理的异常。请查看堆栈跟踪，以获取有关错误及其在代码中的起源位置的更多信息。
异常详细信息：System.Web.HttpException：一个页面只能有一个服务器端的Form标记。
来源错误：
在执行当前Web请求期间生成了未处理的异常。可以使用下面的异常堆栈跟踪来识别有关异常的起源和位置的信息。
堆栈追踪：
[HttpException (0x80004005): A page can have only one server-side Form tag.]
System.Web.UI.Page.OnFormRender() +8721176
System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +33
System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +32
System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +51
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +40
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
System.Web.UI.Control.Render(HtmlTextWriter writer) +10
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
System.Web.UI.Control.Render(HtmlTextWriter writer) +10
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +134
System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +19
System.Web.UI.Page.Render(HtmlTextWriter writer) +29
System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +27
System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +99
System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +25
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1266
似乎这个错误是因为我正在调用函数this.Page.RenderControl(hw);
有没有人有过如何解决此问题的经验？
谢谢。
答案 0 :(得分：3)
看起来您必须在页面上停用EventValidation，否则您将收到RegisterForEventValidation can only be called during Render();错误。
正在发生的事情是，页面正在全部呈现到HtmlTextWriter中，然后在Render事件期间重新呈现以在Response中输出。这可能导致ASP看到两个Form标签并抛出错误。解决方案是覆盖页面的Render方法，捕获所需的html，将其发送到电子邮件中，并将html写入要显示在页面上的Response。
This link很好地描述了正在发生的事情以及如何覆盖Render。
编辑：您应该可以致电base.Render并捕获输出以写入Response以及您的电子邮件。
在按钮单击中，设置一个布尔值，指示是否通过电子邮件发送页面：
public void myButton_Click(object sender, EventArgs e)
{
okayToEmail = true;
}
然后当您覆盖渲染时，将页面渲染为新的HtmlTextWriter，将内容写入页面的HtmlTextWriter，并检查标记的值。如果为true，请通过电子邮件发送内容。
protected override void Render(HtmlTextWriter writer)
{
var sb = new StringBuilder();
using (var sw = new StringWriter(sb))
{
using (var htw = new HtmlTextWriter(sw))
{
base.Render(htw);
writer.Write(sb.ToString());
if (okayToEmail)
{
using (var message = new MailMessage())
{
message.Body = sb.ToString();
...
}
}
}
}
}
请记住：将整个页面写入电子邮件正文可能不太好......它将包含Doctype标记，html和body标记等将被大多数（可能是所有）电子邮件客户端剥离。此外，链接的样式表将无法使用，我相信大多数电子邮件客户端都会删除嵌入式样式表。
答案 1 :(得分：1)
有一种标准方法可以拦截和处理发送到浏览器的响应 如果您希望收到此回复并进行处理，则应使用Response filters
private void Page_Load(object sender, EventArgs e)
{
// Filter the text to be rendered as all uppercase.
Response.Filter = new UpperCaseFilterStream(Response.Filter);
}
UpperCaseFilter类，一个自定义Stream类，它将通过它的所有文本转换为大写。
Asp.net将调用流的Write方法。您需要在流类中进行一些缓冲，因为它可能会以块的形式接收数据。