How to generate PDF from HTML file for HTML to PDF API in VB.NET with PDF.co Web API
What is PDF.co Web API? It is the flexible Web API that includes full set of functions from e-signature requests to data extraction, OCR, images recognition, pdf splitting and pdf splitting. Can also generate barcodes and read barcodes from images, scans and pdf.
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ByteScoutWebApiExample.sln
Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 15
VisualStudioVersion = 15.0.26730.10
MinimumVisualStudioVersion = 10.0.40219.1
Project("{F184B08F-C81C-45F6-A57F-5ABD9991F28F}") = "ByteScoutWebApiExample", "ByteScoutWebApiExample.vbproj", "{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
Release|Any CPU = Release|Any CPU
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}.Debug|Any CPU.Build.0 = Debug|Any CPU
{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}.Release|Any CPU.ActiveCfg = Release|Any CPU
{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}.Release|Any CPU.Build.0 = Release|Any CPU
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GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
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GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {4576C9BB-A42D-46A8-9198-7E2982E122FA}
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ByteScoutWebApiExample.vbproj
<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
<PropertyGroup>
<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
<ProjectGuid>{9B91124C-66C3-4BD9-B29E-168C1ABB15AC}</ProjectGuid>
<OutputType>Exe</OutputType>
<StartupObject>ByteScoutWebApiExample.Module1</StartupObject>
<RootNamespace>ByteScoutWebApiExample</RootNamespace>
<AssemblyName>ByteScoutWebApiExample</AssemblyName>
<FileAlignment>512</FileAlignment>
<MyType>Console</MyType>
<TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
<PlatformTarget>AnyCPU</PlatformTarget>
<DebugSymbols>true</DebugSymbols>
<DebugType>full</DebugType>
<DefineDebug>true</DefineDebug>
<DefineTrace>true</DefineTrace>
<OutputPath>bin\Debug\</OutputPath>
<DocumentationFile>ByteScoutWebApiExample.xml</DocumentationFile>
<NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn>
</PropertyGroup>
<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
<PlatformTarget>AnyCPU</PlatformTarget>
<DebugType>pdbonly</DebugType>
<DefineDebug>false</DefineDebug>
<DefineTrace>true</DefineTrace>
<Optimize>true</Optimize>
<OutputPath>bin\Release\</OutputPath>
<DocumentationFile>ByteScoutWebApiExample.xml</DocumentationFile>
<NoWarn>42016,41999,42017,42018,42019,42032,42036,42020,42021,42022</NoWarn>
</PropertyGroup>
<PropertyGroup>
<OptionExplicit>On</OptionExplicit>
</PropertyGroup>
<PropertyGroup>
<OptionCompare>Binary</OptionCompare>
</PropertyGroup>
<PropertyGroup>
<OptionStrict>Off</OptionStrict>
</PropertyGroup>
<PropertyGroup>
<OptionInfer>On</OptionInfer>
</PropertyGroup>
<ItemGroup>
<Reference Include="Newtonsoft.Json, Version=10.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
<HintPath>packages\Newtonsoft.Json.10.0.3\lib\net40\Newtonsoft.Json.dll</HintPath>
</Reference>
<Reference Include="System" />
<Reference Include="System.Data" />
<Reference Include="System.Deployment" />
<Reference Include="System.Xml" />
<Reference Include="System.Core" />
<Reference Include="System.Xml.Linq" />
<Reference Include="System.Data.DataSetExtensions" />
</ItemGroup>
<ItemGroup>
<Import Include="Microsoft.VisualBasic" />
<Import Include="System" />
<Import Include="System.Collections" />
<Import Include="System.Collections.Generic" />
<Import Include="System.Data" />
<Import Include="System.Diagnostics" />
<Import Include="System.Linq" />
<Import Include="System.Xml.Linq" />
</ItemGroup>
<ItemGroup>
<Compile Include="Module1.vb" />
</ItemGroup>
<ItemGroup>
<Content Include="sample.html">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</Content>
<None Include="packages.config" />
</ItemGroup>
<Import Project="$(MSBuildToolsPath)\Microsoft.VisualBasic.targets" />
</Project>
Module1.vb
Imports System.IO
Imports System.Net
Imports Newtonsoft.Json
Imports Newtonsoft.Json.Linq
Module Module1
' The authentication key (API Key).
' Get your own by registering at https://app.pdf.co/documentation/api
Const API_KEY As String = "***********************************"
' HTML input
Dim inputSample As String = File.ReadAllText(".\sample.html")
' Destination PDF file name
Const DestinationFile As String = ".\result.pdf"
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")
Try
' Prepare requests params as JSON
' See documentation: https : //apidocs.pdf.co/?#1-json-pdfconvertfromhtml
Dim parameters As New Dictionary(Of String, Object)
' Input HTML code to be converted. Required.
parameters.Add("html", inputSample)
' Name of resulting file
parameters.Add("name", Path.GetFileName(DestinationFile))
' Set to css style margins Like 10 px Or 5px 5px 5px 5px.
parameters.Add("margins", "5px 5px 5px 5px")
' Can be Letter, A4, A5, A6 Or custom size Like 200x200
parameters.Add("paperSize", "Letter")
' Set to Portrait Or Landscape. Portrait by default.
parameters.Add("orientation", "Portrait")
' true by default. Set to false to disbale printing of background.
parameters.Add("printBackground", True)
' If large input document, process in async mode by passing true
parameters.Add("async", False)
' Set to HTML for header to be applied on every page at the header.
parameters.Add("header", "")
' Set to HTML for footer to be applied on every page at the bottom.
parameters.Add("footer", "")
' Convert dictionary of params to JSON
Dim jsonPayload As String = JsonConvert.SerializeObject(parameters)
' Prepare URL for `HTML to PDF` API call
Dim url As String = "https://api.pdf.co/v1/pdf/convert/from/html"
' 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()
webClient.Headers.Remove("Content-Type") ' remove the header required for only the previous request
' Download the PDF file
webClient.DownloadFile(resultFileUrl, DestinationFile)
Console.WriteLine("Generated PDF document saved as ""{0}"" file.", DestinationFile)
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
packages.config
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="Newtonsoft.Json" version="10.0.3" targetFramework="net40" />
</packages>
VIDEO
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See also:
ON-DEMAND REST WEB API
Get Your API Key
See also:
printable version:
PDF-co-Web-API-VB-NET-Generate-PDF-From-HTML-File.pdf
PDF-co-Web-API-VB-NET-Generate-PDF-From-HTML-File.pdf
