扩展程序控件'HtmlEditorExtender1'不是注册的扩展程序控件

Question

我有一个webform，我使用了ajax toolkit的HtmlEditorExtender1。它工作正常。现在我尝试在点击按钮时使用iTextSharp将整个webform转换为pdf。但是我收到了这个错误：

Extender control 'HtmlEditorExtender1' is not a registered extender control. Extender controls must be registered using RegisterExtenderControl() before calling RegisterScriptDescriptors().
Parameter name: extenderControl

我认为这与HtmlEditorExtender1

有关

 <ajaxToolkit:HtmlEditorExtender ID="HtmlEditorExtender1" runat="server" TargetControlID="txtkeyresultforyear" EnableSanitization="false" />

我的网络表单顶部如下所示：

<%@ Page Title="" Language="C#" MasterPageFile="~/ModuleMain.master" AutoEventWireup="true"
    ValidateRequest="false" CodeBehind="xyz.aspx.cs" EnableEventValidation = "false" Inherits="abc.xyz" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>

我的代码点击按钮

protected void btntopdf_Click(object sender, EventArgs e)
{
    Response.ContentType = "application/pdf";
    Response.AddHeader("content-disposition", "attachment;filename=TestPage.pdf");
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    StringWriter sw = new StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(sw);
    this.Page.RenderControl(hw);
    StringReader sr = new StringReader(sw.ToString());
    Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
    HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
    PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
    pdfDoc.Open();
    htmlparser.Parse(sr);
    pdfDoc.Close();
    Response.Write(pdfDoc);
    Response.End();
}

修改

我收到此错误：

this.Page.RenderControl(hw);

Answer 1

如果你生成了pdf

然后尝试此代码

        pdfWriter.CloseStream = false;
        pdfDoc.Close();
        HttpContext.Current.Response.Buffer = true;
        HttpContext.Current.Response.ContentType = "application/pdf";
        HttpContext.Current.Response.AddHeader("content-disposition:", "attachment;filename=" + _fileName + ".pdf");
        //  HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.NoCache);
        HttpContext.Current.Response.Write(pdfDoc);

保存为pdf。