Add Images to Existing PDF - VB.NET
PDF Add Text, Signatures and Images to PDF sample in VB.NET demonstrating ‘Add Images to Existing PDF’
Module1.vb
Imports System.IO
Imports System.Net
Imports Newtonsoft.Json.Linq
Module Module1
' The authentication key (API Key).
' Get your own by registering at https://app.pdf.co
Const API_KEY As String = "***********************************"
' 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 SourceFileUrl As String = "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 Pages As String = ""
' PDF document password. Leave empty for unprotected documents.
Const Password As String = ""
' Destination PDF file name
Const DestinationFile As String = ".\result.pdf"
' Image params
Private Const X1 As Int32 = 400
Private Const Y1 As Int32 = 20
Private Const Width1 As Int32 = 119
Private Const Height1 As Int32 = 32
Private Const ImageUrl As String = "https://bytescout-com.s3.amazonaws.com/files/demo-files/cloud-api/pdf-edit/logo.png"
Sub Main()
' Create standard .NET web client instance
Dim webClient As WebClient = New WebClient()
' Set API Key
webClient.Headers.Add("x-api-key", API_KEY)
' Set JSON content type
webClient.Headers.Add("Content-Type", "application/json")
' * Add image *
' Prepare URL for `PDF Edit` API call
Dim url As String = "https://api.pdf.co/v1/pdf/edit/add"
' Prepare requests params as JSON
' See documentation: https://apidocs.pdf.co/04-pdf-add-text-signatures-and-images-to-pdf
Dim jsonPayload As String = $"{{
""name"": ""{Path.GetFileName(DestinationFile)}"",
""url"": ""{SourceFileUrl}"",
""password"": ""{Password}"",
""images"": [
{{
""url"": ""{ImageUrl}"",
""x"": {X1},
""y"": {Y1},
""width"": {Width1},
""height"": {Height1},
""pages"": ""{Pages}""
}}
]
}}"
Try
' Execute POST request with JSON payload
Dim response As String = webClient.UploadString(url, jsonPayload)
' Parse JSON response
Dim json As JObject = JObject.Parse(response)
If json("error").ToObject(Of Boolean) = False Then
' Get URL of generated PDF file
Dim resultFileUrl As String = json("url").ToString()
' Download PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile)
Console.WriteLine("Generated PDF file saved as ""{0}"" file.", DestinationFile)
Else
Console.WriteLine(json("message").ToString())
End If
Catch ex As WebException
Console.WriteLine(ex.ToString())
End Try
webClient.Dispose()
Console.WriteLine()
Console.WriteLine("Press any key...")
Console.ReadKey()
End Sub
End Module
PDF.co Web API: the Web API with a set of tools for documents manipulation, data conversion, data extraction, splitting and merging of documents. Includes image recognition, built-in OCR, barcode generation and barcode decoders to decode bar codes from scans, pictures and pdf.
Download Source Code (.zip)
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