asp.net core form builder

If you’re looking for an ASP.NET Core form builder, there are a few common approaches depending on what you need:

1. Build forms dynamically yourself

If you want full control, you can create form definitions in JSON/database and render them with Razor or Blazor.

Example model:

public class FormField
{
    public string Name { get; set; }
    public string Label { get; set; }
    public string Type { get; set; } // text, email, select, checkbox
    public bool Required { get; set; }
    public List<string> Options { get; set; }
}

Then render fields dynamically in Razor:

@foreach (var field in Model.Fields)
{
    <div class="mb-3">
        <label class="form-label">@field.Label</label>

        @if (field.Type == "text")
        {
            <input class="form-control" name="@field.Name" />
        }
        else if (field.Type == "select")
        {
            <select class="form-select" name="@field.Name">
                @foreach (var option in field.Options)
                {
                    <option value="@option">@option</option>
                }
            </select>
        }
    </div>
}

2. Use a library/package

There are libraries and UI frameworks that help with dynamic forms, validation, and builders. Depending on your stack:

• Blazor: dynamic component rendering, form components, validation
• ASP.NET Core MVC: custom tag helpers, editor templates
• Third-party form builders: often integrated with admin panels or low-code tools

3. Use a drag-and-drop form builder

If you want a no-code or low-code solution, you can integrate:

• Form.io
• SurveyJS
• Jotform
• Typeform
• Microsoft Power Apps (for business workflows)

These usually let you build forms visually and embed or consume them via API.

4. Build a reusable form builder in ASP.NET Core MVC

Typical architecture:

• Store form schema in database as JSON
• Use a controller to load schema
• Render inputs dynamically in Razor
• Post values back as a dictionary
• Validate based on schema rules
• Save submissions to database

Example POST action:

[HttpPost]
public IActionResult Submit(Dictionary<string, string> formValues)
{
    // Save formValues or map to your schema
    return RedirectToAction("Success");
}

Best choice depends on your goal:

• Need quick custom internal forms → build dynamic forms yourself
• Need drag-and-drop non-dev builder → Form.io / SurveyJS / similar
• Need MVC/Razor reusable forms → editor templates + tag helpers
• Need enterprise workflows → Power Apps / low-code platform

If you want, I can give you:

1. a complete ASP.NET Core MVC dynamic form builder example, or
2. a Blazor form builder example, or
3. a recommended third-party library list.