PDF.co Web API - Barcode Reader API - C# - Read Barcode From Uploaded File - ByteScout

PDF.co Web API – Barcode Reader API – C# – Read Barcode From Uploaded File

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PDF.co Web API – Barcode Reader API – C# – Read Barcode From Uploaded File

Program.cs

[csharp]
using System;
using System.IO;
using System.Net;
using Newtonsoft.Json.Linq;

namespace ByteScoutWebApiExample
{
class Program
{
// The authentication key (API Key).
// Get your own by registering at https://app.pdf.co/documentation/api
const String API_KEY = “***********************************”;

// Source file name
const string SourceFile = @”.\sample.pdf”;
// Comma-separated list of barcode types to search.
// See valid barcode types in the documentation https://app.pdf.co/documentation/api/1.0/barcode/read_from_url.html
const string BarcodeTypes = “Code128,Code39,Interleaved2of5,EAN13”;
// Comma-separated list of page indices (or ranges) to process. Leave empty for all pages. Example: ‘0,2-5,7-‘.
const string Pages = “”;

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);

// 1. RETRIEVE THE PRESIGNED URL TO UPLOAD THE FILE.
// * If you already have a direct file URL, skip to the step 3.

// Prepare URL for `Get Presigned URL` API call
string query = Uri.EscapeUriString(string.Format(
“https://api.pdf.co/v1/file/upload/get-presigned-url?contenttype=application/octet-stream&name={0}”,
Path.GetFileName(SourceFile)));

try
{
// Execute request
string response = webClient.DownloadString(query);

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

if (json[“error”].ToObject() == false)
{
// Get URL to use for the file upload
string uploadUrl = json[“presignedUrl”].ToString();
// Get URL of uploaded file to use with later API calls
string uploadedFileUrl = json[“url”].ToString();

// 2. UPLOAD THE FILE TO CLOUD.

webClient.Headers.Add(“content-type”, “application/octet-stream”);
webClient.UploadFile(uploadUrl, “PUT”, SourceFile); // You can use UploadData() instead if your file is byte[] or Stream

// 3. READ BARCODES FROM UPLOADED FILE

// Prepare URL for `Barcode Reader` API call
query = Uri.EscapeUriString(string.Format(
“https://api.pdf.co/v1/barcode/read/from/url?types={0}&pages={1}&url={2}”,
BarcodeTypes,
Pages,
uploadedFileUrl));

// Execute request
response = webClient.DownloadString(query);

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

if (json[“error”].ToObject() == false)
{
// Display found barcodes in console
foreach (JToken token in json[“barcodes”])
{
Console.WriteLine(“Found barcode:”);
Console.WriteLine(” Type: ” + token[“TypeName”]);
Console.WriteLine(” Value: ” + token[“Value”]);
Console.WriteLine(” Document Page Index: ” + token[“Page”]);
Console.WriteLine(” Rectangle: ” + token[“Rect”]);
Console.WriteLine(” Confidence: ” + token[“Confidence”]);
Console.WriteLine();
}
}
else
{
// Display service reported error
Console.WriteLine(json[“message”].ToString());
}
}
else
{
// Display service reported error
Console.WriteLine(json[“message”].ToString());
}
}
catch (WebException e)
{
// Display request error
Console.WriteLine(e.ToString());
}

webClient.Dispose();

Console.WriteLine();
Console.WriteLine(“Press any key…”);
Console.ReadKey();
}
}
}

[/csharp]


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