In this short article, we’ll demonstrate source code for how to convert HTML/URL to PDF using SharePoint and PDF.co. Let’s get into source code.

  1. Convert HTML to PDF – Source Code Snippets
  2. Source Code at GitHub
  3. Convert HTML to PDF – Demo Video
  4. Convert HTML to PDF – Sample Screenshots

Convert HTML to PDF – Source Code Snippets

Check out the markup for Web Part visual control.

VisualWebPart1UserControl.ascx

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %>
<%@ Assembly Name="Microsoft.Web.CommandUI, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> 
<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %> 
<%@ Register Tagprefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Register Tagprefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>
<%@ Import Namespace="Microsoft.SharePoint" %> 
<%@ Register Tagprefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages" Assembly="Microsoft.SharePoint, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="VisualWebPart1UserControl.ascx.cs" Inherits="ConvertWebPageToPDFLinkWebPart.VisualWebPart1.VisualWebPart1UserControl" %>
Page url<br />
<asp:TextBox ID="UrlTextBox" runat="server" Width="600px">http://en.wikipedia.org/wiki/Main_Page</asp:TextBox>
<br />
<br />
<asp:Button ID="StartButton" runat="server" OnClick="StartButton_Click" Text="Start" style="width: 610px; padding-left: 0px; margin-left: 0px; padding-right: 0px; padding-right: 0px;"/>
<br />
<br />
Log<br />
<asp:TextBox ID="LogTextBox" runat="server" Height="300px" TextMode="MultiLine" Width="600px"></asp:TextBox>
<br />

This is code behind for Web Part User Control.

VisualWebPart1UserControl.ascx.cs

using Microsoft.SharePoint;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

namespace ConvertWebPageToPDFLinkWebPart.VisualWebPart1
{
    public partial class VisualWebPart1UserControl : UserControl
    {
        public SPWeb CurrentWeb { get; set; }

        // The authentication key (API Key).
        // Get your own by registering at https://app.pdf.co/documentation/api
        string API_KEY = Utils.API_KEY;

        // Destination PDF file name
        const string DestinationFile = "result.pdf";
        const string DestinationLibName = "Shared Documents";

        protected void Page_Load(object sender, EventArgs e)
        {
        }

        protected void StartButton_Click(object sender, EventArgs e)
        {
            // Create standard .NET web client instance
            ServicePointManager.Expect100Continue = true;
            ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
            WebClient webClient = new WebClient();
            var SourceUrl = UrlTextBox.Text;

            if (String.IsNullOrWhiteSpace(SourceUrl))
            {
                LogTextBox.Text += "Enter valid web page url \n";
                return;
            }

            // Set API Key
            webClient.Headers.Add("x-api-key", API_KEY);
            
            // URL for `Web Page to PDF` API call
            string url = "https://api.pdf.co/v1/pdf/convert/from/url";

            // Prepare requests params as JSON
            Dictionary<string, object> requestBody = new Dictionary<string, object>();
            requestBody.Add("name", DestinationFile);
            requestBody.Add("url", SourceUrl);

            // Convert dictionary of params to JSON
            string jsonPayload = JsonConvert.SerializeObject(requestBody);

            try
            {
                // Execute POST request
                var response = webClient.UploadString(url, "POST", jsonPayload);

                // Parse JSON response
                JObject json = JObject.Parse(response);

                if (json["error"].ToObject() == false)
                {
                    // Get URL of generated PDF file
                    string resultFileUrl = json["url"].ToString();

                    // Download PDF file
                    var retData = webClient.DownloadData(resultFileUrl);

                    //Upload file to SharePoint document library
                    //Read create stream
                    using (MemoryStream stream = new MemoryStream(retData))
                    {
                        //Get handle of library
                        SPFolder spLibrary = CurrentWeb.Folders[DestinationLibName];

                        //Replace existing file
                        var replaceExistingFile = true;

                        //Upload document to library
                        SPFile spfile = spLibrary.Files.Add(DestinationFile, stream, replaceExistingFile);
                        spLibrary.Update();
                    }

                    LogTextBox.Text += String.Format("Generated PDF document saved as \"{0}\\{1}\" file. \n", DestinationLibName, DestinationFile);
                }
                else
                {
                    LogTextBox.Text += json["message"].ToString() + " \n";
                }
            }
            catch (Exception ex)
            {
                LogTextBox.Text += ex.ToString() + " \n";
            }

            webClient.Dispose();

            LogTextBox.Text += "\n";
            LogTextBox.Text += "Done...\n";
        }
    }
}

Source Code at GitHub

You can explore the full source code for this sample at this GitHub link.

Convert HTML to PDF – Demo Video


Convert HTML to PDF – Sample Screenshots

 

I hope this code snippet is useful to you. Please try it yourself to get to know more. Thank You!

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