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980143: Line Angle Constraint Sample for ASP .NET MVC platform
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‎How to/Line Angle Constraint/PDFViewerSample.csproj‎

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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>net6.0</TargetFramework>
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<Nullable>enable</Nullable>
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<ImplicitUsings>enable</ImplicitUsings>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Syncfusion.EJ2.AspNet.Core" Version="*" />
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<PackageReference Include="Syncfusion.EJ2.PdfViewer.AspNet.Core" Version="*" />
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</ItemGroup>
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</Project>

‎How to/Line Angle Constraint/PDFViewerSample.sln‎

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 17
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VisualStudioVersion = 17.0.32112.339
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "PDFViewerSample", "PDFViewerSample.csproj", "{39AA1883-BB43-4C46-9892-6033EA59C990}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{39AA1883-BB43-4C46-9892-6033EA59C990}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{39AA1883-BB43-4C46-9892-6033EA59C990}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{39AA1883-BB43-4C46-9892-6033EA59C990}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{39AA1883-BB43-4C46-9892-6033EA59C990}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {5F13CE16-9CC4-4755-AFB4-367F461A209C}
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EndGlobalSection
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EndGlobal

‎How to/Line Angle Constraint/Pages/Error.cshtml‎

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@page
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@model ErrorModel
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@{
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ViewData["Title"] = "Error";
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}
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<h1 class="text-danger">Error.</h1>
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<h2 class="text-danger">An error occurred while processing your request.</h2>
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@if (Model.ShowRequestId)
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{
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<p>
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<strong>Request ID:</strong> <code>@Model.RequestId</code>
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</p>
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}
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<h3>Development Mode</h3>
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<p>
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Swapping to the <strong>Development</strong> environment displays detailed information about the error that occurred.
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</p>
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<p>
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<strong>The Development environment shouldn't be enabled for deployed applications.</strong>
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It can result in displaying sensitive information from exceptions to end users.
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For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
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and restarting the app.
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</p>

‎How to/Line Angle Constraint/Pages/Error.cshtml.cs‎

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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.RazorPages;
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using System.Diagnostics;
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namespace PDFViewerSample.Pages
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{
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[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
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[IgnoreAntiforgeryToken]
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public class ErrorModel : PageModel
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{
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public string? RequestId { get; set; }
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public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
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private readonly ILogger<ErrorModel> _logger;
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public ErrorModel(ILogger<ErrorModel> logger)
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{
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_logger = logger;
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}
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public void OnGet()
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{
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RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
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}
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}
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}

‎How to/Line Angle Constraint/Pages/Index.cshtml‎

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@page "{handler?}"
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@model IndexModel
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@{
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ViewData["Title"] = "Home page";
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}
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<div style="width:100%;height:600px">
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<!-- To configure the server-backed PDF Viewer, include the "serviceUrl='/Index'" attribute -->
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<ejs-pdfviewer id="pdfviewer"
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documentPath="https://cdn.syncfusion.com/content/pdf/pdf-succinctly.pdf"
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resourceUrl="https://cdn.syncfusion.com/ej2/30.2.7/dist/ej2-pdfviewer-lib"
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style="height:641px;">
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</ejs-pdfviewer>
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</div>
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<script type="text/javascript">
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window.onload = function () {
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var viewer = document.getElementById('pdfviewer').ej2_instances[0];
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viewer.annotationDrawingOptions.enableLineAngleConstraints = true;
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viewer.annotationDrawingOptions.restrictLineAngleTo = 90;
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};
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</script>

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