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Keerthivasan-RamamoorthyKeerthivasan-Ramamoorthy
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Merge pull request #130 from BalaVigneshRaviChandran/ES-940808-UserHandleUG
940808:UG sample for handing userhandle click event
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‎UG-Samples/UserHandle/UserHandleClickEvents/README.md‎

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#UserHandle Sample
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This sample demonstrates how to customize the click events of the user handles for the nodes and connectors.
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Demo link:
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https://blazor.syncfusion.com/demos/diagramcomponent/userhandles?theme=fluent
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## Prerequisites
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* Visual Studio 2022
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## How to run the project
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* Checkout this project to a location in your disk.
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* Open the solution file using the Visual Studio 2022.
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* Restore the NuGet packages by rebuilding the solution.
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* Run the project.

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/App.razor‎

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@namespace UserHandleClickEvents
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<Router AppAssembly="@typeof(App).Assembly">
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<Found Context="routeData">
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<RouteView RouteData="@routeData" DefaultLayout="@typeof(MainLayout)" />
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<FocusOnNavigate RouteData="@routeData" Selector="h1" />
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</Found>
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<NotFound>
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<PageTitle>Not found</PageTitle>
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<LayoutView Layout="@typeof(MainLayout)">
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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>
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‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/Pages/Index.razor‎

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@page "/"
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@using System.Collections.ObjectModel
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@using Syncfusion.Blazor.Diagram
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<div>
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<SfDiagramComponent @ref="Diagram" Height="500px"
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Nodes="@nodes"
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Connectors="@connectors"
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SelectionSettings="@SelectedModel"
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GetCustomTool="GetCustomTool">
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<SnapSettings Constraints="SnapConstraints.None"></SnapSettings>
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</SfDiagramComponent>
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</div>
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@code
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{
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public SfDiagramComponent Diagram;
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public DiagramObjectCollection<Node> nodes { get; set; }
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public DiagramObjectCollection<Connector> connectors { get; set; }
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// Defines diagram's SelectionSettings.
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DiagramSelectionSettings SelectedModel = new DiagramSelectionSettings();
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DiagramObjectCollection<UserHandle> UserHandles = new DiagramObjectCollection<UserHandle>();
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protected override void OnInitialized()
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{
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nodes = new DiagramObjectCollection<Node>();
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connectors = new DiagramObjectCollection<Connector>();
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InitDiagramModel();
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}
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public InteractionControllerBase GetCustomTool(DiagramElementAction action, string id)
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{
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return id == "clone" ? new CloneTool(Diagram) : new DeleteTool(Diagram);
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}
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public class DeleteTool : InteractionControllerBase
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{
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SfDiagramComponent diagram;
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public DeleteTool(SfDiagramComponent diagram) : base(diagram) { this.diagram = diagram; }
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public override void OnMouseUp(DiagramMouseEventArgs args)
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{
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diagram.Delete();
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base.OnMouseUp(args);
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}
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}
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public class CloneTool : DragController
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{
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SfDiagramComponent diagram;
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public CloneTool(SfDiagramComponent diagram) : base(diagram) { this.diagram = diagram; }
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public override void OnMouseDown(DiagramMouseEventArgs args)
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{
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diagram.Copy();
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diagram.Paste();
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base.OnMouseDown(args);
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}
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}
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private void InitDiagramModel()
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{
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var node = new Node()
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{
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ID = "Node1",
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OffsetX = 300,
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OffsetY = 200,
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Width = 100,
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Height = 100,
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Style = new ShapeStyle() { Fill = "#6495ED", StrokeColor = "none" },
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Annotations = new DiagramObjectCollection<ShapeAnnotation>()
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{
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new ShapeAnnotation() { Content = "Node" }
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}
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};
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nodes.Add(node);
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var connector = new Connector()
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{
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ID = "Connector1",
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SourcePoint = new DiagramPoint() { X = 500, Y = 150 },
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TargetPoint = new DiagramPoint() { X = 600, Y = 250 },
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Type = ConnectorSegmentType.Orthogonal,
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Annotations = new DiagramObjectCollection<PathAnnotation>()
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{
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new PathAnnotation(){ Content = "Connector" }
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}
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};
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connectors.Add(connector);
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var cloneHandle = new UserHandle()
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{
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Name = "clone",
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PathData = "M60.3,18H27.5c-3,0-5.5,2.4-5.5,5.5v38.2h5.5V23.5h32.7V18z M68.5,28.9h-30c-3,0-5.5,2.4-5.5,5.5v38.2c0,3,2.4,5.5,5.5,5.5h30c3,0,5.5-2.4,5.5-5.5V34.4C73.9,31.4,71.5,28.9,68.5,28.9z M68.5,72.5h-30V34.4h30V72.5z",
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Offset = 0,
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Side = Direction.Right,
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Visible = true,
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VisibleTarget = VisibleTarget.Node | VisibleTarget.Connector
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};
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var deleteHandle = new UserHandle()
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{
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Name = "delete",
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PathData = "M0.54700077,2.2130003 L7.2129992,2.2130003 7.2129992,8.8800011 C7.2129992,9.1920013 7.1049975,9.4570007 6.8879985,9.6739998 6.6709994,9.8910007 6.406,10 6.0939997,10 L1.6659999,10 C1.3539997,10 1.0890004,9.8910007 0.87200136,9.6739998 0.65500242,9.4570007 0.54700071,9.1920013 0.54700077,8.8800011 z M2.4999992,0 L5.2600006,0 5.8329986,0.54600048 7.7599996,0.54600048 7.7599996,1.6660004 0,1.6660004 0,0.54600048 1.9270014,0.54600048 z",
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Offset = 1,
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Side = Direction.Bottom,
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VisibleTarget = VisibleTarget.Node | VisibleTarget.Connector,
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Visible = true
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};
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UserHandles = new DiagramObjectCollection<UserHandle>()
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{
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cloneHandle, deleteHandle
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};
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SelectedModel = new DiagramSelectionSettings()
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{
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//Enable userhandle for selected model.
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Constraints = SelectorConstraints.UserHandle,
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UserHandles = this.UserHandles
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};
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}
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}

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/Pages/_Host.cshtml‎

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@page "/"
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@namespace UserHandleClickEvents.Pages
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@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
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@{
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Layout = "_Layout";
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}
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<component type="typeof(App)" render-mode="ServerPrerendered" />

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/Pages/_Layout.cshtml‎

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@using Microsoft.AspNetCore.Components.Web
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@namespace UserHandleClickEvents.Pages
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@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
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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" />
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<base href="~/" />
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<link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
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<link href="css/site.css" rel="stylesheet" />
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<script src="_content/Syncfusion.Blazor.Core/scripts/syncfusion-blazor.min.js" type="text/javascript"></script>
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<link href="_content/Syncfusion.Blazor.Themes/bootstrap5.css" rel="stylesheet" />
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<component type="typeof(HeadOutlet)" render-mode="ServerPrerendered" />
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</head>
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<body>
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@RenderBody()
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<script src="_framework/blazor.server.js"></script>
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</body>
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</html>

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/Program.cs‎

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using Microsoft.AspNetCore.Components;
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using Microsoft.AspNetCore.Components.Web;
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using Syncfusion.Blazor;
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var builder = WebApplication.CreateBuilder(args);
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// Add services to the container.
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builder.Services.AddRazorPages();
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builder.Services.AddServerSideBlazor();
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builder.Services.AddSyncfusionBlazor();
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var app = builder.Build();
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// Configure the HTTP request pipeline.
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if (!app.Environment.IsDevelopment())
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{
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app.UseExceptionHandler("/Error");
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// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
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app.UseHsts();
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}
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app.UseHttpsRedirection();
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app.UseStaticFiles();
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app.UseRouting();
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app.MapBlazorHub();
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app.MapFallbackToPage("/_Host");
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app.Run();

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/Properties/launchSettings.json‎

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{
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"iisSettings": {
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"windowsAuthentication": false,
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"anonymousAuthentication": true,
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"iisExpress": {
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"applicationUrl": "http://localhost:11920",
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"sslPort": 44341
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}
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},
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"profiles": {
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"UserHandleClickEvents": {
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"commandName": "Project",
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"dotnetRunMessages": true,
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"launchBrowser": true,
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"applicationUrl": "https://localhost:7204;http://localhost:5236",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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},
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"IIS Express": {
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"commandName": "IISExpress",
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"launchBrowser": true,
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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}
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}
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}

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/Shared/MainLayout.razor‎

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@namespace UserHandleClickEvents.Shared
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@inherits LayoutComponentBase
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<PageTitle>UserHandleClickEvents</PageTitle>
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<div class="page">
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<div class="sidebar">
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</div>
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<main>
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<article class="content px-4">
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@Body
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</article>
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</main>
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</div>

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/Shared/MainLayout.razor.css‎

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.page {
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position: relative;
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display: flex;
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flex-direction: column;
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}
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main {
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flex: 1;
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}
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.sidebar {
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background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 70%);
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}
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.top-row {
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background-color: #f7f7f7;
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border-bottom: 1px solid #d6d5d5;
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justify-content: flex-end;
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height: 3.5rem;
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display: flex;
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align-items: center;
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}
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.top-row ::deep a, .top-row .btn-link {
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white-space: nowrap;
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margin-left: 1.5rem;
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}
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.top-row a:first-child {
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overflow: hidden;
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text-overflow: ellipsis;
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}
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@media (max-width: 640.98px) {
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.top-row:not(.auth) {
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display: none;
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}
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.top-row.auth {
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justify-content: space-between;
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}
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.top-row a, .top-row .btn-link {
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margin-left: 0;
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}
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}
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@media (min-width: 641px) {
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.page {
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flex-direction: row;
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}
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.sidebar {
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width: 250px;
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height: 100vh;
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position: sticky;
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top: 0;
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}
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.top-row {
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position: sticky;
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top: 0;
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z-index: 1;
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}
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.top-row, article {
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padding-left: 2rem !important;
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padding-right: 1.5rem !important;
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}
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}

‎UG-Samples/UserHandle/UserHandleClickEvents/UserHandleClickEvents/UserHandleClickEvents_NET6.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.Blazor.Diagram" Version="*" />
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<PackageReference Include="Syncfusion.Blazor.Themes" Version="*" />
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</ItemGroup>
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<ItemGroup>
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<Folder Include="wwwroot\" />
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</ItemGroup>
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</Project>

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