ByteScout PDF SDK - C# - External JS for form data validation - ByteScout

ByteScout PDF SDK – C# – External JS for form data validation

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external JS for form data validation in C# and ByteScout PDF SDK

ByteScout PDF SDK is the library for pdf documents generation, modification and updates. Can also generate and fill PDF forms. Provides support for text (fonts, style, size, font family), layers, pdf form fields, vector and raster drawings.

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ExternalJsFormValidation.csproj
      
<?xml version="1.0" encoding="utf-8"?> <Project ToolsVersion="14.0" DefaultTargets="Build" 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>{474F52FF-3928-44EA-8F6F-379E9DAA23FF}</ProjectGuid> <OutputType>Exe</OutputType> <RootNamespace>ExternalJsFormValidation</RootNamespace> <AssemblyName>ExternalJsFormValidation</AssemblyName> <TargetFrameworkVersion>v2.0</TargetFrameworkVersion> <FileAlignment>512</FileAlignment> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' "> <PlatformTarget>AnyCPU</PlatformTarget> <DebugSymbols>true</DebugSymbols> <DebugType>full</DebugType> <Optimize>false</Optimize> <OutputPath>bin\Debug\</OutputPath> <DefineConstants>DEBUG;TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' "> <PlatformTarget>AnyCPU</PlatformTarget> <DebugType>pdbonly</DebugType> <Optimize>true</Optimize> <OutputPath>bin\Release\</OutputPath> <DefineConstants>TRACE</DefineConstants> <ErrorReport>prompt</ErrorReport> <WarningLevel>4</WarningLevel> </PropertyGroup> <ItemGroup> <Reference Include="Bytescout.PDF, Version=1.0.0.15, Culture=neutral, PublicKeyToken=f7dd1bd9d40a50eb, processorArchitecture=MSIL"> <SpecificVersion>False</SpecificVersion> </Reference> <Reference Include="System" /> <Reference Include="System.Data" /> <Reference Include="System.Drawing" /> </ItemGroup> <ItemGroup> <Compile Include="Program.cs" /> </ItemGroup> <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" /> <!-- To modify your build process, add your task inside one of the targets below and uncomment it. Other similar extension points exist, see Microsoft.Common.targets. <Target Name="BeforeBuild"> </Target> <Target Name="AfterBuild"> </Target> --> </Project>

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Program.cs
      
using System.Diagnostics; using Bytescout.PDF; namespace ExternalJsFormValidation { /// <summary> /// This example demonstrates validation of form with JavaScript /// </summary> class Program { static void Main() { // Create new document Document pdfDocument = new Document(); pdfDocument.RegistrationName = "demo"; pdfDocument.RegistrationKey = "demo"; // Add page Page page = new Page(PaperFormat.A4); pdfDocument.Pages.Add(page); // Get page canvas Canvas canvas = page.Canvas; // Prepare font and brush Font font = new Font(StandardFonts.Helvetica, 15); SolidBrush blackBrush = new SolidBrush(); // Draw First Name Label canvas.DrawString("First Name: ", font, blackBrush, 50, 50); // Create First Name EditBox EditBox firstName = new EditBox(130, 50, 100, 30, "FirstName"); // Add javascript validation of focus lose firstName.OnLoseFocus = new JavaScriptAction(@" if(event.value == ''){ app.alert('First Name is required!'); } "); // Add First Name Editbox to page page.Annotations.Add(firstName); // Draw Last Name Label canvas.DrawString("Last Name: ", font, blackBrush, 50, 100); // Create Last Name EditBox EditBox lastName = new EditBox(130, 100, 100, 30, "LastName"); // Add javascript validation on focus lose lastName.OnLoseFocus = new JavaScriptAction(@" if(event.value == ''){ app.alert('Last Name is required!'); } "); page.Annotations.Add(lastName); // Create a button PushButton btnSubmit = new PushButton(50, 150, 150, 30, "SayHello"); btnSubmit.Caption = "Say Hello!"; // Javascript action to validate as well as displaying message btnSubmit.OnMouseDown = new JavaScriptAction(@" var valFirstName = this.getField('FirstName').value; var valLastName = this.getField('LastName').value; if(valFirstName == '' || valLastName == ''){ app.alert('Please complete incompete values in form!'); } else{ var messageToDisplay = 'Hello, ' + valLastName + ' ' + valFirstName + '!'; app.alert(messageToDisplay, 4); } "); page.Annotations.Add(btnSubmit); // Save document to file pdfDocument.Save("result.pdf"); // Cleanup pdfDocument.Dispose(); // Open result document in default associated application (for demo purpose) ProcessStartInfo processStartInfo = new ProcessStartInfo("result.pdf"); processStartInfo.UseShellExecute = true; Process.Start(processStartInfo); } } }

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