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AndreyKozhevnikovAndreyKozhevnikov
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‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/App.razor‎

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<Router AppAssembly="@typeof(Program).Assembly" AdditionalAssemblies="new[] { typeof(DevExpress.ExpressApp.Blazor.BlazorApplication).Assembly }">
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<Found Context="routeData">
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<RouteView RouteData="@routeData" />
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</Found>
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<NotFound>
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<LayoutView>
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<PageTitle>Not found</PageTitle>
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<p role="alert">Sorry, there's nothing at this address.</p>
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</LayoutView>
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</NotFound>
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</Router>

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/BlazorApplication.cs‎

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using DevExpress.ExpressApp;
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using DevExpress.ExpressApp.ApplicationBuilder;
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using DevExpress.ExpressApp.Blazor;
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using DevExpress.ExpressApp.SystemModule;
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using ItemCountEF.Module.BusinessObjects;
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using Microsoft.EntityFrameworkCore;
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using DevExpress.ExpressApp.EFCore;
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namespace ItemCountEF.Blazor.Server;
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public class ItemCountEFBlazorApplication : BlazorApplication {
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public ItemCountEFBlazorApplication() {
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ApplicationName = "ItemCountEF";
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CheckCompatibilityType = DevExpress.ExpressApp.CheckCompatibilityType.DatabaseSchema;
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DatabaseVersionMismatch += ItemCountEFBlazorApplication_DatabaseVersionMismatch;
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}
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protected override void OnSetupStarted() {
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base.OnSetupStarted();
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#if DEBUG
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if(System.Diagnostics.Debugger.IsAttached && CheckCompatibilityType == CheckCompatibilityType.DatabaseSchema) {
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DatabaseUpdateMode = DatabaseUpdateMode.UpdateDatabaseAlways;
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}
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#endif
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}
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private void ItemCountEFBlazorApplication_DatabaseVersionMismatch(object sender, DatabaseVersionMismatchEventArgs e) {
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#if EASYTEST
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e.Updater.Update();
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e.Handled = true;
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#else
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if(System.Diagnostics.Debugger.IsAttached) {
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e.Updater.Update();
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e.Handled = true;
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}
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else {
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string message = "The application cannot connect to the specified database, " +
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"because the database doesn't exist, its version is older " +
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"than that of the application or its schema does not match " +
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"the ORM data model structure. To avoid this error, use one " +
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"of the solutions from the https://www.devexpress.com/kb=T367835 KB Article.";
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if(e.CompatibilityError != null && e.CompatibilityError.Exception != null) {
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message += "\r\n\r\nInner exception: " + e.CompatibilityError.Exception.Message;
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}
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throw new InvalidOperationException(message);
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}
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#endif
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}
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}

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/BlazorModule.cs‎

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using System.ComponentModel;
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using DevExpress.ExpressApp;
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using DevExpress.ExpressApp.DC;
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using DevExpress.ExpressApp.Model;
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using DevExpress.ExpressApp.Editors;
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using DevExpress.ExpressApp.Actions;
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using DevExpress.ExpressApp.Updating;
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using DevExpress.ExpressApp.Model.Core;
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using DevExpress.ExpressApp.Model.DomainLogics;
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using DevExpress.ExpressApp.Model.NodeGenerators;
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using DevExpress.Persistent.BaseImpl.EF;
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namespace ItemCountEF.Blazor.Server;
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[ToolboxItemFilter("Xaf.Platform.Blazor")]
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// For more typical usage scenarios, be sure to check out https://docs.devexpress.com/eXpressAppFramework/DevExpress.ExpressApp.ModuleBase.
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public sealed class ItemCountEFBlazorModule : ModuleBase {
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public ItemCountEFBlazorModule() {
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}
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public override IEnumerable<ModuleUpdater> GetModuleUpdaters(IObjectSpace objectSpace, Version versionFromDB) {
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return ModuleUpdater.EmptyModuleUpdaters;
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}
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public override void Setup(XafApplication application) {
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base.Setup(application);
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}
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}

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/Controllers/ReadMe.txt‎

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Folder Description
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The "Controllers" project folder is intended for storing Blazor-specific Controller classes
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that can change the default XAF application flow and add new features.
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Relevant Documentation
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Controllers and Actions
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https://docs.devexpress.com/eXpressAppFramework/112623
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Implement Custom Controllers
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https://docs.devexpress.com/eXpressAppFramework/112621
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Define the Scope of Controllers and Actions
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https://docs.devexpress.com/eXpressAppFramework/113103
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Ways to Show a View
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https://docs.devexpress.com/eXpressAppFramework/112803
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Ways to Implement Business Logic
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https://docs.devexpress.com/eXpressAppFramework/113710
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Debugging, Unit and Functional Testing
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https://docs.devexpress.com/eXpressAppFramework/112572

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/Editors/ReadMe.txt‎

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Folder Description
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This project folder is intended for storing custom Blazor List Editors,
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Property Editors and View Items.
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Relevant Documentation
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Using a Custom Control that is not Integrated by Default
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https://docs.devexpress.com/eXpressAppFramework/113610
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Ways to Access UI Elements and Their Controls
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https://docs.devexpress.com/eXpressAppFramework/120092
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Views
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https://docs.devexpress.com/eXpressAppFramework/112611
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List Editors
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https://docs.devexpress.com/eXpressAppFramework/113189
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View Items
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https://docs.devexpress.com/eXpressAppFramework/112612
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Debugging, Unit and Functional Testing
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https://docs.devexpress.com/eXpressAppFramework/112572

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/Images/ReadMe.txt‎

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Folder Description
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The "Images" project folder is intended for storing custom image files.
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Relevant Documentation
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Add and Override Images
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https://docs.devexpress.com/eXpressAppFramework/112792
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Assign a Custom Image
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https://docs.devexpress.com/eXpressAppFramework/112744

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/ItemCountEF.Blazor.Server.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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<CheckEolTargetFramework>false</CheckEolTargetFramework>
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<Deterministic>false</Deterministic>
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<AssemblyVersion>1.0.*</AssemblyVersion>
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<FileVersion>1.0.0.0</FileVersion>
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<Configurations>Debug;Release;EasyTest</Configurations>
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<ImplicitUsings>enable</ImplicitUsings>
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</PropertyGroup>
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<ItemGroup>
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<None Remove="Model.xafml" />
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</ItemGroup>
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<ItemGroup>
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<Content Include="Model.xafml">
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<CopyToOutputDirectory>Always</CopyToOutputDirectory>
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</Content>
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</ItemGroup>
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<ItemGroup>
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<PackageReference Include="DevExpress.ExpressApp.Blazor" Version="22.2.5" />
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<PackageReference Include="DevExpress.ExpressApp.CodeAnalysis" Version="22.2.5" />
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</ItemGroup>
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<ItemGroup>
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<ProjectReference Include="..\ItemCountEF.Module\ItemCountEF.Module.csproj" />
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</ItemGroup>
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</Project>

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/Model.xafml‎

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<?xml version="1.0" encoding="utf-8"?>
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<Application>
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<NavigationItems NavigationStyle="Accordion">
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</NavigationItems>
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<Views DefaultListEditor="DevExpress.ExpressApp.Blazor.Editors.DxGridListEditor">
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</Views>
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</Application>

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/Pages/_Host.cshtml‎

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@page "/"
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@namespace ItemCountEF.Blazor.Server
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@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
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@using DevExpress.ExpressApp.Blazor.Components
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, shrink-to-fit=no" />
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<meta name="apple-mobile-web-app-capable" content="yes" />
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<!-- meta name="theme-color" content="#000000" -->
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<title>ItemCountEF</title>
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<base href="~/" />
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<component type="typeof(BootstrapThemeLink)" render-mode="Static" />
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</head>
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<body>
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@{
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string userAgent = Request.Headers["User-Agent"];
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bool isIE = userAgent.Contains("MSIE") || userAgent.Contains("Trident");
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}
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@if(isIE) {
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<link href="css/site.css" rel="stylesheet" />
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<div class="d-flex flex-column justify-content-center align-items-center h-100">
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<div class="d-flex">
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<img class="mt-2 mr-4" src="_content/DevExpress.ExpressApp.Blazor/images/Sad.svg" width="60" height="60" />
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<div>
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<div class="h1">Internet Explorer is not supported.</div>
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<p style="font-size: 1rem; opacity: 0.75;" class="m-0">ItemCountEF cannot be loaded in Internet Explorer.<br>Please use a different browser.</p>
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</div>
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</div>
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</div>
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}
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else {
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<component type="typeof(SplashScreen)" render-mode="Static" param-Caption='"ItemCountEF"' param-ImagePath='"images/SplashScreen.svg"' />
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<link href="_content/DevExpress.ExpressApp.Blazor/styles.css" rel="stylesheet" />
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<link href="css/site.css" rel="stylesheet" />
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<script src="_content/DevExpress.ExpressApp.Blazor/scripts.js"></script>
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<app class="d-none">
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<component type="typeof(App)" render-mode="Server" />
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</app>
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<component type="typeof(AlertsHandler)" render-mode="Server" />
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<div id="blazor-error-ui">
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<component type="typeof(BlazorError)" render-mode="Static" />
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</div>
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<script src="_framework/blazor.server.js"></script>
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}
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</body>
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</html>

‎CS/EFCore/ItemCountEF/ItemCountEF.Blazor.Server/Program.cs‎

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using System.Reflection;
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using DevExpress.ExpressApp;
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using DevExpress.ExpressApp.Blazor.DesignTime;
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using DevExpress.ExpressApp.Blazor.Services;
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using DevExpress.ExpressApp.Design;
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using DevExpress.ExpressApp.Utils;
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namespace ItemCountEF.Blazor.Server;
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public class Program : IDesignTimeApplicationFactory {
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private static bool ContainsArgument(string[] args, string argument) {
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return args.Any(arg => arg.TrimStart('/').TrimStart('-').ToLower() == argument.ToLower());
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}
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public static int Main(string[] args) {
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if(ContainsArgument(args, "help") || ContainsArgument(args, "h")) {
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Console.WriteLine("Updates the database when its version does not match the application's version.");
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Console.WriteLine();
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Console.WriteLine($" {Assembly.GetExecutingAssembly().GetName().Name}.exe --updateDatabase [--forceUpdate --silent]");
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Console.WriteLine();
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Console.WriteLine("--forceUpdate - Marks that the database must be updated whether its version matches the application's version or not.");
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Console.WriteLine("--silent - Marks that database update proceeds automatically and does not require any interaction with the user.");
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Console.WriteLine();
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Console.WriteLine($"Exit codes: 0 - {DBUpdaterStatus.UpdateCompleted}");
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Console.WriteLine($" 1 - {DBUpdaterStatus.UpdateError}");
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Console.WriteLine($" 2 - {DBUpdaterStatus.UpdateNotNeeded}");
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}
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else {
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DevExpress.ExpressApp.FrameworkSettings.DefaultSettingsCompatibilityMode = DevExpress.ExpressApp.FrameworkSettingsCompatibilityMode.Latest;
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IHost host = CreateHostBuilder(args).Build();
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if(ContainsArgument(args, "updateDatabase")) {
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using(var serviceScope = host.Services.CreateScope()) {
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return serviceScope.ServiceProvider.GetRequiredService<DevExpress.ExpressApp.Utils.IDBUpdater>().Update(ContainsArgument(args, "forceUpdate"), ContainsArgument(args, "silent"));
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}
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}
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else {
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host.Run();
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}
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}
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return 0;
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}
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public static IHostBuilder CreateHostBuilder(string[] args) =>
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Host.CreateDefaultBuilder(args)
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.ConfigureWebHostDefaults(webBuilder => {
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webBuilder.UseStartup<Startup>();
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});
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XafApplication IDesignTimeApplicationFactory.Create() {
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IHostBuilder hostBuilder = CreateHostBuilder(Array.Empty<string>());
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return DesignTimeApplicationFactoryHelper.Create(hostBuilder);
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}
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}

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