Production Validation UX and Capstone

Validation in Wisej.NETModule 7The lesson guide, the walkthrough video, the knowledge check and the hands-on lab this sample was built from are on learnwisej.com — free, with an AI tutor in every lesson.

Open the course

The capstone combines binding, field rules, annotations, business rules and the contacts grid in one ordered Save pipeline. SummaryErrorProvider keeps extender, icon and summary feedback together. This folder is the complete application at this point in the course, with its own solution and port.

The source of this sample

iceteagroup/LearnWisej-SamplesValidation in Wisej.NET Course/Module 7

Browse this folder on GitHub

Or clone it: git clone https://github.com/iceteagroup/LearnWisej-Samples.git — then open ValidationClinic.slnx in Visual Studio and press F5.

Run it

Requirements: .NET 10 SDK and NuGet access to Wisej-4 4.1.0. Use a Wisej development license or trial as required by your installation. No database setup or external service is needed.

cd "Validation in Wisej.NET Course/Module 7/ValidationClinic"
dotnet run -f net10.0 --urls http://localhost:5907

Open http://localhost:5907. In Visual Studio, open ValidationClinic.slnx and press F5. The project targets both net10.0-windows and net10.0, so the CLI needs -f when running.

What to try

Action	Expected result
Open intake; Save with empty Name and Email	The field stage stops the pipeline; the icons and custom summary show the errors.
Load valid values; set Age to 130; Save	Field shape passes, then DataAnnotations blocks the model. No grid check or write follows.
Set start after end; Save	The business layer marks both dates and stops the pipeline.
Cancel; mark a grid row Closed without its date; reopen intake, Load valid values, Save	The grid stage blocks the entire save; the intake summary includes the row message.
Correct the grid row and intake; Save	One atomic repository replacement persists the contact and edited grid rows; the trace ends with write.
Create a new contact named Ada Lovelace; Save	The duplicate-name exception becomes a Name field error. No grid or contact changes are persisted.
Load valid values, choose Fail next write, then Save	A friendly system message appears; the write count does not change. Save again to recover with the same input.
Discard grid edits	Restores the last saved snapshot. Working-copy edits are not persisted automatically.

The repository starts with Ada Lovelace and Grace Hopper. Every browser session owns its own repository. Its data disappears when the session ends or the app restarts. The live trace shows which validation stage ran; the write count provides visible evidence that rejected input never called a successful write.

Design notes

Capstone test matrix and five-minute demo.

The sample uses AutoValidate.EnableAllowFocusChange: errors remain visible while the user reaches another field to fix a related value. Cancel never causes validation. Save explicitly validates every relevant layer. The in-memory repository is deliberately a storage stand-in; callers own validation, as in the lesson. It checks name uniqueness and swaps the saved snapshot only after all repository checks pass.

Automated checks

From the module folder, run dotnet test ValidationClinic.Tests/ValidationClinic.Tests.csproj. The tests compile the actual model and service sources without a Wisej session: required values, email shape, name and age boundaries, birthday boundaries, paired date errors, Closed rows, snapshot isolation, duplicate names, atomic failed writes and retry. Browser interaction is checked separately.