GeoBlazor Pro

GeoBlazor Logo

GeoBlazor Pro is a commercial extension to the free GeoBlazor Core library that includes many exclusive features around editing and manipulating GIS data. This package requires agreeing to our license to use. GeoBlazor Pro is currently in an open Beta. You can register for free during the Beta period. By using GeoBlazor Pro, you agree to share your email address with dymaptic, so that we might contact you about updates to the program.

How the License Works

Each deployment of an application, be it website or MAUI app, will make a one-time call to to validate the license key and email, which are placed in environment settings/config as described below. Once the license has been validated for that device/deployment, it will be stored locally and will not need to be validated again. Any change in base URL or redeployment will trigger a new validation call.

For Blazor WebAssembly and Blazor Hybrid MAUI applications, this does mean that each end user of your app will need access to the internet in order to unlock the Pro license.

Getting Started

  1. Create a new Blazor Web App (.NET 8), Blazor Server, Blazor Wasm, or Blazor Hybrid (MAUI) project, using the templates provided in your IDE or the dotnet CLI.
  2. Add a PackageReference to the latest version of the dymaptic.GeoBlazor.Pro package via your IDE’s Nuget Package Manager or dotnet add package dymaptic.GeoBlazor.Pro --prerelease. For Blazor Web Apps supporting WebAssembly, add this reference to the .Client WebAssembly project.
  3. The ArcGIS API requires some form of authentication. The simplest is to use an API Key. Generate a key from the ArcGIS Developer Dashboard. For Blazor Server, place it in your appsettings.json, like this:

      "Logging": ...,
      "AllowedHosts": ...,
      "ArcGISApiKey": "yourKeyValue"
    Note: If you are using Blazor WASM, there are several issues with this approach. First, appsettings.json is not added by default to all templates. If you want to add it yourself, you need to add it inside the wwwroot folder. For Blazor Web Apps with WebAssembly, you must define the API key in _both_ projects. Be Aware that the API key will be exposed in the browser (just like it would with Javascript). Even when using Blazor Server, the API key may be present in HTTP requests visible to the user in the browsers dev tools, so you should probably take other steps like setting up referrer rules in ArcGIS.
    You can also set up an OAuth2 workflow, which is more secure as it does not expose a static API key, but this is more complex. You can read about all the authentication options in Authentication.
  4. Visit dymaptic licensing ( and register for a license.
  5. Copy the new license key from into your appsettings or secrets. If you intend to release MAUI applications, also add the "MauiAppName" property. "ValidationServerStoragePath" is optional to define where a Blazor Server application will store the validated license result (defaults to Path.GetTempPath()). You must ensure that your server has write access to this path.

       "ArcGISApiKey": "yourKeyValue",
       "GeoBlazor": {
          "LicenseKey": "YOUR_LICENSE_KEY",
          "MauiAppName": "YOUR_APP_NAME",
          "ValidationServerStoragePath": "YOUR_PATH_TO_STORAGE"
  6. In the root file that defines your html, add the following lines to the <head> section. This would be _Layout.cshtml for Blazor Server, index.html for Blazor Wasm and Blazor Hybrid, or App.razor for Blazor Web Apps. Note that YourProject is the namespace for the application that you are creating.

     <link href="_content/dymaptic.GeoBlazor.Pro"/>
     <link href="_content/dymaptic.GeoBlazor.Core"/>
     <link href="_content/dymaptic.GeoBlazor.Core/assets/esri/themes/light/main.css" rel="stylesheet" />
     <link href="YourProject.styles.css" rel="stylesheet" />

    or (dark theme)

     <link href="_content/dymaptic.GeoBlazor.Pro"/>
     <link href="_content/dymaptic.GeoBlazor.Core"/>
     <link href="_content/dymaptic.GeoBlazor.Core/assets/esri/themes/dark/main.css" rel="stylesheet" />
     <link href="YourProject.styles.css" rel="stylesheet" />
    Note: You may already have the `YourProject.styles.css` file. If so, you can just add the two lines to the existing file. In some .Net templates, this file is commented out by default and you will need to add it.
  7. In _Imports.razor (for each executable project), add the following lines, or add as needed to resolve code that you consume.

     @using dymaptic.GeoBlazor.Core.Components
     @using dymaptic.GeoBlazor.Core.Components.Geometries
     @using dymaptic.GeoBlazor.Core.Components.Layers
     @using dymaptic.GeoBlazor.Core.Components.Popups
     @using dymaptic.GeoBlazor.Core.Components.Symbols
     @using dymaptic.GeoBlazor.Core.Components.Views
     @using dymaptic.GeoBlazor.Core.Components.Widgets
     @using dymaptic.GeoBlazor.Core.Events
     @using dymaptic.GeoBlazor.Core.Objects
     @using dymaptic.GeoBlazor.Pro.Components.Widgets
  8. In Program.cs (for each executable project), add the following line to your builder.Services to inject logic components like GeometryEngine.


    If you are using Blazor Server or InteractiveServer mode in Blazor Web Apps, you should also add the following lines to Program.cs to support the .wsv file type.

    var provider = new FileExtensionContentTypeProvider();
    provider.Mappings[".wsv"] = "application/octet-stream";
    // NOTE: for some reason, you still need the plain "UseStaticFiles" call above
    app.UseStaticFiles(new StaticFileOptions
        ContentTypeProvider = provider
  9. Create a new Razor Component in the Pages folder, or just use Index.razor. Add a MapView. Give it basic parameters to ensure that it can render.

    @page "/"
    <MapView Longitude="_longitude" Latitude="_latitude" Zoom="11" Style="height: 400px; width: 100%;"> 
        <Map ArcGISDefaultBasemap="arcgis-topographic">
            <GraphicsLayer @ref="_graphicsLayer" />
        <SketchWidget GraphicsLayerId="_graphicsLayer!.Id!" Position="OverlayPosition.BottomLeft" />
    @code {
       private readonly double _latitude = 34.027;
       private readonly double _longitude = -118.805;
       private GraphicsLayer? _graphicsLayer = new();