Add Text by finding target coordinates - C#
PDF Add Text, Signatures and Images to PDF sample in C# demonstrating ‘Add Text by finding target coordinates’
Program.cs
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Net;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
// Visit Knowledgebase for adding Text Macros to PDF
// https://apidocs.pdf.co/kb/Fill%20PDF%20and%20Add%20Text%20or%20Images%20(pdf-edit-add)/macros
namespace ByteScoutWebApiExample
{
class Program
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co
const String API_KEY = "*****************************************";
// Direct URL of source PDF file.
// You can also upload your own file into PDF.co and use it as url. Check "Upload File" samples for code snippets: https://github.com/bytescout/pdf-co-api-samples/tree/master/File%20Upload/
const string SourceFileUrl = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-edit/sample.pdf";
// Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: '0,2-5,7-'.
const string Pages = "";
// PDF document password. Leave empty for unprotected documents.
const string Password = "";
// Destination PDF file name
const string DestinationFile = @".\result.pdf";
// Annotation params
const string Text = "Some notes will go here... Some notes will go here.... Some notes will go here.....";
const string FontName = "Times New Roman";
const float FontSize = 12;
const string FontColor = "FF0000";
static void Main(string[] args)
{
// Create standard .NET web client instance
WebClient webClient = new WebClient();
// Set API Key
webClient.Headers.Add("x-api-key", API_KEY);
// * Add text annotation *
// Find coordinates of key phrase to add annotation at the same Y coordinate
var coordinates = FindCoordinates(API_KEY, SourceFileUrl, "Notes");
var X = coordinates.X;
var Y = coordinates.Y + 25;
// See documentation: https://apidocs.pdf.co/04-pdf-add-text-signatures-and-images-to-pdf
// Prepare requests params as JSON
string jsonPayload = $@"{{
""name"": ""{Path.GetFileName(DestinationFile)}"",
""url"": ""{SourceFileUrl}"",
""password"": ""{Password}"",
""annotations"": [
{{
""x"": {X},
""y"": {Y},
""text"": ""{Text}"",
""fontname"": ""{FontName}"",
""size"": ""{FontSize.ToString(CultureInfo.InvariantCulture)}"",
""color"": ""{FontColor}"",
""pages"": ""{Pages}""
}}
]
}}";
try
{
// URL of "PDF Edit" endpoint
string url = "https://api.pdf.co/v1/pdf/edit/add";
// Execute POST request with JSON payload
string response = webClient.UploadString(url, jsonPayload);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["error"].ToObject<bool>() == false)
{
// Get URL of generated PDF file
string resultFileUrl = json["url"].ToString();
// Download generated PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile);
Console.WriteLine("Generated PDF file saved as \"{0}\" file.", DestinationFile);
}
else
{
Console.WriteLine(json["message"].ToString());
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
}
finally
{
webClient.Dispose();
}
Console.WriteLine();
Console.WriteLine("Press any key...");
Console.ReadKey();
}
/// <summary>
/// Find text coordinates
/// </summary>
public static ResultCoordinates FindCoordinates(string apiKey, string sourceFileUrl, string searchString)
{
ResultCoordinates result = null;
// Create standard .NET web client instance
WebClient webClient = new WebClient();
// Set API Key
webClient.Headers.Add("x-api-key", apiKey);
// Prepare requests params as JSON
// See documentation: https://apidocs.pdf.co/07-pdf-search-text
Dictionary<string, string> parameters = new Dictionary<string, string>();
parameters.Add("url", sourceFileUrl);
parameters.Add("searchString", searchString);
// Convert dictionary of params to JSON
string jsonPayload = JsonConvert.SerializeObject(parameters);
try
{
// URL of "PDF Find" endpoint
string url = "https://api.pdf.co/v1/pdf/find";
// Execute POST request with JSON payload
string response = webClient.UploadString(url, jsonPayload);
// Parse JSON response
JObject json = JObject.Parse(response);
if (json["status"].ToString() != "error")
{
JToken item = json["body"][0];
result = new ResultCoordinates
{
X = Convert.ToInt32(item["left"]),
Y = Convert.ToInt32(item["top"]),
Width = Convert.ToInt32(item["width"]),
Height = Convert.ToInt32(item["height"])
};
}
}
catch (WebException e)
{
Console.WriteLine(e.ToString());
throw;
}
finally
{
webClient.Dispose();
}
return result;
}
}
public class ResultCoordinates
{
public int X { get; set; }
public int Y { get; set; }
public int Width { get; set; }
public int Height { get; set; }
}
}
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