Aggiunto helper estrazione querystring

EgwCoreLib.BlazorTest/Pages/TestComponenti.razor

@@ -1,11 +1,9 @@
 @page "/TestComponenti"
 
+@inject NavigationManager NavMan
+
 <PageTitle>Test</PageTitle>
 
-
-
-
-
 <div class="card">
     <div class="card-header">
         <h1>Test Componenti custom</h1>
@@ -15,7 +13,7 @@
             <div class="col-3">
                 <div class="card">
                     <div class="card-header">
-                        <h3>Test Image</h3>
+                        Test Image
                     </div>
                     <div class="card-body py-1">
                         <img src="_content/EgwCoreLib.Razor/images/LogoEgw.png" class="img-fluid" width="200" height="200" />
@@ -48,25 +46,43 @@
             <div class="col-3">
                 <div class="card">
                     <div class="card-header">
-                        Clipboard copy
+                        Input Speciali
                     </div>
                     <div class="card-body py-1">
                         <small>Test copia clipboard, GUID (presudo)random</small>
                         <CopyToClipboard Text="@textToCopy"></CopyToClipboard>
+                        <hr />
+                        <small>Input numerico con gestione cifre (es x double)</small>
+                        <NumInput CssClass="form-control" @bind-Value="@valDecimale"></NumInput>
+                        <div>
+                            <b>@valDecimale</b>
+                        </div>
                     </div>
                 </div>
             </div>
             <div class="col-3">
                 <div class="card">
                     <div class="card-header">
-                        Number Input
+                        QueryString
                     </div>
                     <div class="card-body py-1">
-                        <small>Input numerico con gestione cifre (es x double)</small>
-                        <NumInput CssClass="form-control" @bind-Value="@valDecimale"></NumInput>
-                        <div>
-                            <b>@valDecimale</b>
-                        </div>
+                        
+
+                        Test valori QueryString
+                        <ul class="list-group">
+                            <li class="list-group-item">
+                                Query string <b>Nome</b>:
+                            </li>
+                            <li class="list-group-item">
+                                @qsNome
+                            </li>
+                            <li class="list-group-item">
+                                Query string <b>Intero</b>:
+                            </li>
+                            <li class="list-group-item">
+                                @qsIntero
+                            </li>
+                        </ul>
                     </div>
                 </div>
             </div>
@@ -81,4 +97,13 @@
     protected string textToCopy = $"{Guid.NewGuid()}";
     protected decimal valDecimale = 12345;
 
+    private string qsNome = "";
+    private int qsIntero = 0;
+
+    protected override void OnInitialized()
+    {
+        // base.OnInitialized();
+        qsNome = NavMan.ExtractQueryStringByKey<string>("Nome");
+        qsIntero = NavMan.ExtractQueryStringByKey<int>("Intero");
+    }
 }

EgwCoreLib.Razor/EgwCoreLib.Razor.csproj

@@ -68,6 +68,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Components" Version="6.0.14" />
     <PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="6.0.14" />
+    <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.1.1" />
     <PackageReference Include="ZXing.Net" Version="0.16.9" />
   </ItemGroup>
 

EgwCoreLib.Razor/NavigationManagerExtension.cs

@@ -0,0 +1,44 @@
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.WebUtilities;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EgwCoreLib.Razor
+{
+    public static class NavigationManagerExtension
+    {
+        #region Public Methods
+
+        /// <summary>
+        /// Estensione metodo NavigationManager
+        ///
+        /// https://code-maze.com/query-strings-blazor-webassembly/
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="navManager"></param>
+        /// <param name="key"></param>
+        /// <returns></returns>
+        public static T ExtractQueryStringByKey<T>(this NavigationManager navManager, string key)
+        {
+            var uri = navManager.ToAbsoluteUri(navManager.Uri);
+            QueryHelpers.ParseQuery(uri.Query)
+                .TryGetValue(key, out var queryValue);
+
+            if (typeof(T).Equals(typeof(int)))
+            {
+                int.TryParse(queryValue, out int result);
+                return (T)(object)result;
+            }
+
+            if (typeof(T).Equals(typeof(string)))
+                return (T)(object)queryValue.ToString();
+
+            return default;
+        }
+
+        #endregion Public Methods
+    }
+}