¿Cómo exportar una página web a PDF con solo pasar la URL de parámetro?

En este post veremos una tarea que es muy común en el desarrollo de sitios web, cómo exportar una página web  o HTML a PDF. El código es muy sencillo, solo se requiere de 4 líneas de código y listo. Al final del artículo puedes encontrar un video que te lleva paso a paso de cómo exportar una página web a PDF. Bueno pasamos al ejemplo

  1. Vas a Estrada WebGroup, HTML a PDF y seleccionas probar para generar tu API
  2. Creas un sitio web nuevo en Visual Studio
  3. Agregas la referencia del servicio web (http://produccion.developerji.com/ConvertirHtmlaPDF.asmx), como se muestra a continuación.
    convertir html a pdf en mi sitio web      convertir html a pdf con asp.net

    servicio web para convertir html a pdf
  4. Agregas una página al sitio y a esta le agregas un botón, que sería el que invoque la conversión de la página a PDF. El HTML queda de la siguiente manera:
    <%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
    <!DOCTYPE html>
    <html xmlns="http://www.w3.org/1999/xhtml">
    <head runat="server">
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
        <form id="form1" runat="server">
            <asp:Button ID="bntConvertPDF" runat="server" Text="Convertir a PDF" />
  5. Creas el código de servidor en el evento clic del botón y este quedaría de la siguiente manera:
     Protected Sub bntConvertPDF_Click(sender As Object, e As EventArgs) Handles bntConvertPDF.Click
            'Dirección fisica donde se guardara el pdf 
            Dim sFile As String = Server.MapPath("~/Cliente/pdfdemo.pdf")
            'Llamada al servicio web  
            Dim servicio As New ConvertPDF.ConvertirHtmlaPDFSoapClient
            'Descargo el PDF y se guarda en el servidor del cliente  
            'sFile: la dirección donde se guarda el PDF. En el servicio web servicio.ConvertirUrl_PDF,  
            ' se pasa por parametro la url a convertir, el nombre de usuario y el API que se genera cuando  
            'el usuario se registra en developerji.com 
            File.WriteAllBytes(sFile, servicio.ConvertirUrl_PDF("http://es.wikipedia.org", "jiestrada", "qF4OxILMDYXY6vQ"))
            'Por ultimo redirigimos a donde se encuentra el PDF
        End Sub
  6. Por ultimo abres el web.config  y en <binding debe quedar de la siguiente manera, no modifique el parámetro name, solo agrega lo que falte y listo, ejecuta tu sitio web.
     <binding name="ConvertirHtmlaPDFSoap" openTimeout="00:12:00" receiveTimeout="00:12:00" sendTimeout="00:12:00" maxBufferPoolSize="2097152" maxReceivedMessageSize="2097152"/>


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