--- title: Collaborative Editing in Blazor Diagram Using SignalR... description: SignalR and Redis enable real-time collaborative editing in Blazor Diagram by broadcasting delta payloads from HistoryChanged events through a SignalR hub. The... canonical: https://daily.dev/posts/collaborative-editing-in-blazor-diagram-using-signalr-and-redis-pm4n9bioq twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Collaborative Editing in Blazor Diagram Using SignalR and Redis | daily.dev og:description: SignalR and Redis enable real-time collaborative editing in Blazor Diagram by broadcasting delta payloads from HistoryChanged events through a SignalR hub. The... og:url: https://daily.dev/posts/collaborative-editing-in-blazor-diagram-using-signalr-and-redis-pm4n9bioq og:image: https://api.daily.dev/og/posts/PM4N9BiOQ.png og:image:alt: Collaborative Editing in Blazor Diagram Using SignalR and Redis og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Collaborative Editing in Blazor Diagram Using SignalR and Redis **[Syncfusion](https://daily.dev/sources/syncfusion)** · [@sureshmohan](https://daily.dev/sureshmohan) · 15 min read · 0 upvotes · 0 comments ## Summary SignalR and Redis enable real-time collaborative editing in Blazor Diagram by broadcasting delta payloads from HistoryChanged events through a SignalR hub. The implementation uses optimistic concurrency with version tracking (userVersion/serverVersion) to detect and reject conflicting edits. Redis serves as a backplane for scaling across multiple server instances, while SetDiagramUpdatesAsync applies remote changes. The approach includes conflict detection by tracking modified element IDs and rejecting stale updates when overlaps occur. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Real-Time Collaborative Editing in React DOCX Editor \[Webinar Show Notes\]](https://daily.dev/posts/real-time-collaborative-editing-in-react-docx-editor-webinar-show-notes--n1xy8wasd) · Syncfusion · 0 upvotes · 0 comments - [Real-Time at Last: SSE and SignalR in ASP.NET Core](https://daily.dev/posts/real-time-at-last-sse-and-signalr-in-asp-net-core-hfyl1qquh) · We Are .NET · 0 upvotes · 0 comments - [Getting Started with the Blazor Diagram Component](https://daily.dev/posts/getting-started-with-the-blazor-diagram-component-4aebmzbwr) · Telerik · 0 upvotes · 0 comments - [How to Build UML Sequence Diagrams in Blazor with Diagram Library](https://daily.dev/posts/how-to-build-uml-sequence-diagrams-in-blazor-with-diagram-library-skk89pzjh) · Syncfusion · 2 upvotes · 0 comments --- Tags: [#redis](https://daily.dev/tags/redis), [#blazor](https://daily.dev/tags/blazor), [#aspnetcore](https://daily.dev/tags/aspnetcore) [View this post on daily.dev](https://daily.dev/posts/collaborative-editing-in-blazor-diagram-using-signalr-and-redis-pm4n9bioq) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Collaborative Editing in Blazor Diagram Using SignalR and Redis","url":"https://daily.dev/posts/collaborative-editing-in-blazor-diagram-using-signalr-and-redis-pm4n9bioq","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/collaborative-editing-in-blazor-diagram-using-signalr-and-redis-pm4n9bioq"},"datePublished":"2026-01-12T14:22:48.214Z","dateModified":"2026-01-13T11:00:14.599Z","description":"SignalR and Redis enable real-time collaborative editing in Blazor Diagram by broadcasting delta payloads from HistoryChanged events through a SignalR hub. 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