Electron.NET Core 0.3.1 fail to compile base Blazor Web project #1041

New Issue

claunia · 2026-01-29T16:56:23Z

claunia commented

2026-01-29 16:56:23 +00:00

Originally created by @Denny09310 on GitHub (Dec 17, 2025).

Description

After upgrading Electron.NET Core from 0.3.0 to 0.3.1, the build fails with an exception related to missing metadata for generated static assets.

Environment

Electron.NET Core: 0.3.1
.NET SDK: 10
Node.js: 24.12.0
Target Runtime: win-x64

Error Message

No metadata 'SourceId' was present for item 'Components\Layout\ReconnectModal.razor.js' and no default value was provided.

I have observed the same issue in another project, where the error referenced different generated assets, such as:

*.razor.js
app.css

Expected Behavior

The project should build successfully after upgrading Electron.NET Core from 0.3.0 to 0.3.1.

Actual Behavior

The build fails with a SourceId metadata exception related to generated static web assets.

Steps to Reproduce

Create a new Blazor Web project.
Add Electron.NET.
Build the project.

Additional Notes

I've also saw that when re-opening the project the file affected by this exception can change, for example now it's "Components\Layout\MainLayout.razor.rz.scp.css", no idea how it calculates this static assets

electron-sample.zip

Originally created by @Denny09310 on GitHub (Dec 17, 2025). ### Description After upgrading **Electron.NET Core** from **0.3.0** to **0.3.1**, the build fails with an exception related to missing metadata for generated static assets. ### Environment * **Electron.NET Core**: 0.3.1 * **.NET SDK**: 10 * **Node.js**: 24.12.0 * **Target Runtime**: win-x64 ### Error Message ``` No metadata 'SourceId' was present for item 'Components\Layout\ReconnectModal.razor.js' and no default value was provided. ``` I have observed the same issue in another project, where the error referenced different generated assets, such as: * `*.razor.js` * `app.css` ### Expected Behavior The project should build successfully after upgrading Electron.NET Core from 0.3.0 to 0.3.1. ### Actual Behavior The build fails with a `SourceId` metadata exception related to generated static web assets. ### Steps to Reproduce 1. Create a new **Blazor Web** project. 2. Add **Electron.NET**. 3. Build the project. ### Additional Notes I've also saw that when re-opening the project the file affected by this exception can change, for example now it's "Components\Layout\MainLayout.razor.rz.scp.css", no idea how it calculates this static assets [electron-sample.zip](https://github.com/user-attachments/files/24217021/electron-sample.zip)

claunia added the bug label 2026-01-29 16:56:23 +00:00

Sign in to join this conversation.

1 Participants

Notifications

Due Date

No due date set.

Dependencies

No dependencies set.

Reference: starred/Electron.NET#1041