c# - 扩展器控件 'HtmlEditorExtender1' 不是注册的扩展器控件

Question

我有一个网络表单，我在上面使用了 ajax 工具包的 HtmlEditorExtender1。它工作正常。现在我正在尝试使用 iTextSharp 单击按钮将整个 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

我相信它与 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" %>

这是我的按钮点击代码:

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();
}

编辑:

我在 :

收到这个错误

this.Page.RenderControl(hw);

Answer 1

如果你的pdf是正确生成的

然后试试这段代码

        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。