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XuanThuLab
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Session
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‎ASP_NET_CORE/05.Session/.vscode/launch.json‎

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{
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// Use IntelliSense to find out which attributes exist for C# debugging
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// Use hover for the description of the existing attributes
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// For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
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"version": "0.2.0",
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"configurations": [
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{
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"name": ".NET Core Launch (web)",
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"type": "coreclr",
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"request": "launch",
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"preLaunchTask": "build",
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// If you have changed target frameworks, make sure to update the program path.
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"program": "${workspaceFolder}/bin/Debug/netcoreapp3.1/05.Session.dll",
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"args": [],
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"cwd": "${workspaceFolder}",
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"stopAtEntry": false,
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// Enable launching a web browser when ASP.NET Core starts. For more information: https://aka.ms/VSCode-CS-LaunchJson-WebBrowser
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"serverReadyAction": {
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"action": "openExternally",
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"pattern": "\\bNow listening on:\\s+(https?://\\S+)"
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},
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"env": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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},
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"sourceFileMap": {
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"/Views": "${workspaceFolder}/Views"
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}
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},
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{
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"name": ".NET Core Attach",
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"type": "coreclr",
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"request": "attach",
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"processId": "${command:pickProcess}"
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}
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]
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}

‎ASP_NET_CORE/05.Session/.vscode/tasks.json‎

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{
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"version": "2.0.0",
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"tasks": [
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{
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"label": "build",
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"command": "dotnet",
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"type": "process",
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"args": [
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"build",
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"${workspaceFolder}/05.Session.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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},
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{
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"label": "publish",
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"command": "dotnet",
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"type": "process",
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"args": [
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"publish",
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"${workspaceFolder}/05.Session.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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},
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{
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"label": "watch",
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"command": "dotnet",
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"type": "process",
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"args": [
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"watch",
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"run",
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"${workspaceFolder}/05.Session.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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}
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]
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}

‎ASP_NET_CORE/05.Session/05.Session.csproj‎

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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>netcoreapp3.1</TargetFramework>
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<RootNamespace>05.Session</RootNamespace>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="Microsoft.AspNetCore.Session" Version="2.2.0" />
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<PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="3.1.7" />
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<PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
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</ItemGroup>
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</Project>

‎ASP_NET_CORE/05.Session/Controller/ProductController.cs‎

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using System;
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using System.Linq;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Http;
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using Newtonsoft.Json;
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namespace _05.Session {
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public class ProductController {
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IListProductName lsPhone;
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IListProductName lsLaptop;
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// Inject hai dịch vụ qua phương thức khởi tạo
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public ProductController (IListProductName lsphone, LaptopName lslaptop) {
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Console.WriteLine (this.GetType ().Name + " created");
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this.lsPhone = lsphone;
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this.lsLaptop = lslaptop;
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}
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// Xuất danh sách sản phẩm cho Response
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public async Task List (HttpContext context) {
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CountAccess (context);
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var sb = new StringBuilder ();
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string lsPhoneHTML = string.Join ("", lsPhone.GetNames ().Select (name => name.HtmlTag ("li"))).HtmlTag ("ul");
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string lsLaptopHTML = string.Join ("", lsLaptop.GetNames ().Select (name => name.HtmlTag ("li"))).HtmlTag ("ul");
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sb.Append ("Danh sách điện thoại".HtmlTag ("h2"));
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sb.Append (lsPhoneHTML);
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sb.Append ("Danh sách Laptop".HtmlTag ("h2"));
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sb.Append (lsLaptopHTML);
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string menu = HtmlHelper.MenuTop (HtmlHelper.DefaultMenuTopItems (), context.Request);
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string html = HtmlHelper.HtmlDocument ("DS Sản phẩm", menu + sb.ToString ().HtmlTag ("div", "container"));
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context.Response.StatusCode = 200;
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await context.Response.WriteAsync (html);
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}
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public void CountAccess (HttpContext context) {
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// Lấy ISession
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var session = context.Session;
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string key_access = "info_access";
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// Lưu vào Session thông tin truy cập
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// Định nghĩa cấu trúc dữ liệu lưu trong Session
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var accessInfoType = new {
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count = 0,
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lasttime = DateTime.Now
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};
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// Đọc chuỗi lưu trong Sessin với key = info_access
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string json = session.GetString (key_access);
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dynamic lastAccessInfo;
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if (json != null) {
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// Convert chuỗi Json - thành đối tượng có cấu trúc như accessInfoType
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lastAccessInfo = JsonConvert.DeserializeObject (json, accessInfoType.GetType ());
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} else {
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// json chưa từng lưu trong Session, accessInfo lấy bằng giá trị khởi tạo
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lastAccessInfo = accessInfoType;
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}
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// Cập nhật thông tin
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var accessInfoSave = new {
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count = lastAccessInfo.count + 1,
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lasttime = DateTime.Now
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};
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// Convert accessInfo thành chuỗi Json và lưu lại vào Session
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string jsonSave = JsonConvert.SerializeObject (accessInfoSave);
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session.SetString (key_access, jsonSave);
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Console.WriteLine (jsonSave);
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}
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public static string CountAccessInfo (HttpContext context) {
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var session = context.Session; // Lấy ISession
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string key_access = "info_access";
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// Lưu vào Session thông tin truy cập
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// Định nghĩa cấu trúc dữ liệu lưu trong Session
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var accessInfoType = new {
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count = 0,
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lasttime = DateTime.Now
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};
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// Đọc chuỗi lưu trong Sessin với key = info_access
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string json = session.GetString (key_access);
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dynamic lastAccessInfo;
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if (json != null) {
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// Convert chuỗi Json - thành đối tượng
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lastAccessInfo = JsonConvert.DeserializeObject (json, accessInfoType.GetType ());
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} else {
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// json chưa từng lưu trong Session, accessInfo lấy bằng giá trị khởi tạo
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lastAccessInfo = accessInfoType;
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}
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if (lastAccessInfo.count == 0) {
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return "Chưa truy cập /Product lần nào".HtmlTag ("p");
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}
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string thongtin = $"Số lần truy cập /Product: {lastAccessInfo.count} - lần cuối: {lastAccessInfo.lasttime.ToLongTimeString()}";
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return thongtin;
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}
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}
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}

‎ASP_NET_CORE/05.Session/HtmlHelper.cs‎

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using System.Collections.Generic;
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using Microsoft.AspNetCore.Http;
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using System.Text;
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public static class HtmlHelper
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{
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/// <summary>
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/// Phát sinh trang HTML
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/// </summary>
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/// <param name="title">Tiêu đề trang</param>
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/// <param name="content">Nội dung trong thẻ body</param>
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/// <returns>Trang HTML</returns>
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public static string HtmlDocument(string title, string content) {
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return $@"
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset=""UTF-8"">
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<title>{title}</title>
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<link rel=""stylesheet"" href=""/css/site.min.css"" />
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<script src=""/js/jquery.min.js"">
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</script><script src=""/js/popper.min.js"">
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</script><script src=""/js/bootstrap.min.js""></script>
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</head>
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<body>
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{content}
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</body>
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</html>";
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}
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/// <summary>
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/// Phát sinh HTML thanh menu trên, menu nào active phụ thuộc vào URL mà request gủi đến
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/// </summary>
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/// <param name="menus">Mảng các menu item, mỗi item có cấu trúc {url, lable}</param>
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/// <param name="request">HttpRequest</param>
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/// <returns></returns>
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public static string MenuTop(object[] menus, HttpRequest request) {
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var menubuilder = new StringBuilder();
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menubuilder.Append("<ul class=\"navbar-nav\">");
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foreach (dynamic menu in menus) {
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string _class = "nav-item";
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// Active khi request.PathBase giống url của menu
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if (request.PathBase == menu.url) _class += " active";
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menubuilder.Append($@"
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<li class=""{_class}"">
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<a class=""nav-link"" href=""{menu.url}"">{menu.label}</a>
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</li>
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");
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}
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menubuilder.Append("</ul>\n");
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string menuhtml = $@"
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<div class=""container"">
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<nav class=""navbar navbar-expand-lg navbar-dark mainbackground"">
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<a class=""navbar-brand"" href=""/"">XTLAB</a>
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<button class=""navbar-toggler"" type=""button""
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data-toggle=""collapse"" data-target=""#my-nav-bar""
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aria-controls=""my-nav-bar"" aria-expanded=""false"" aria-label=""Toggle navigation"">
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<span class=""navbar-toggler-icon""></span>
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</button>
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<div class=""collapse navbar-collapse"" id=""my-nav-bar"">
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{menubuilder}
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</div>
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</nav></div>";
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return menuhtml;
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}
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/// <summary>
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/// Những menu item mặc định cho trang
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/// </summary>
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/// <returns>Mảng các menuitem</returns>
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public static object[] DefaultMenuTopItems() {
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return new object[] {
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new {
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url = "/RequestInfo",
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label = "Request"
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},
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new {
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url = "/Product",
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label = "Product"
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}
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,
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new {
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url = "/Encoding",
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label = "Encoding"
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},
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new {
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url = "/Cookies",
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label = "Cookies"
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},
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new {
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url = "/Json",
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label = "JSON"
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}
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};
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}
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public static string HtmlTrangchu() {
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return $@"
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<div class=""container"">
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<div class=""jumbotron"">
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<h1 class=""display-4"">Đây là một trang Web .NET Core</h1>
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<p class=""lead"">Trang Web này xây dựng trên nền tảng <code>.NET Core</code>,
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chưa sử dụng kỹ thuật MVC - nhằm mục đích học tập.
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Mã nguồn trang này tại <a target=""_blank""
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href=""https://github.com/xuanthulabnet/learn-cs-netcore/blob/master/ASP_NET_CORE/03.RequestResponse/"">
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Mã nguồn Ví dụ</a>
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</p>
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<hr class=""my-4"">
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<p><code>.NET Core</code> là một hệ thống chạy đa nền tảng (Windows, Linux, macOS)</p>
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<a class=""btn btn-danger btn-lg"" href=""https://xuanthulab.net/lap-trinh-c-co-ban/"" role=""button"">Xem thêm</a>
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</div>
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</div>
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";
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}
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// Mở rộng String, phát sinh thẻ HTML với nội dụng là String
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// Ví dụ:
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// "content".HtmlTag() => <p>content</p>
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// "content".HtmlTag("div", "text-danger") => <div class="text-danger">content</div>
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public static string HtmlTag(this string content, string tag = "p", string _class = null) {
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string cls = (_class != null) ? $" class=\"{_class}\"":null;
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return $"<{tag + cls}>{content}</{tag}>";
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}
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public static string td(this string content, string _class = null) {
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return content.HtmlTag("td", _class);
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}
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public static string tr(this string content, string _class = null) {
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return content.HtmlTag("tr", _class);
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}
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public static string table(this string content, string _class = null) {
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return content.HtmlTag("table", _class);
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}
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}

‎ASP_NET_CORE/05.Session/Program.cs‎

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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namespace _05.Session
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{
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public class Program
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{
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public static void Main(string[] args)
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{
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CreateHostBuilder(args).Build().Run();
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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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{
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webBuilder.UseStartup<Startup>();
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});
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}
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}

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