Orchard Core Forms

Enable OrchardCore.Forms and use its widget types inside a FlowPart. Form contains FormElementPart, FormPart, and FlowPart. Input, Select, and TextArea each contain FormInputElementPart, FormElementPart, FormElementLabelPart, their specific element part, FormElementValidationPart, and FormInputElementVisibilityPart.

Part	Current responsibility
FormPart	Action, Method, WorkflowTypeId, EncType, anti-forgery, and form-location behavior
FormElementPart	Element Id
FormInputElementPart	Submitted field Name
InputPart	Input Type, DefaultValue, and Placeholder
SelectPart	Options, DefaultValue, and Editor

The Form wrapper emits an anti-forgery token when enabled and, by default, the __RequestOriginatedFrom workflow input used by HTTP workflow redirects.

Enable Forms

{
  "steps": [
    {
      "name": "Feature",
      "enable": [
        "OrchardCore.Forms",
        "OrchardCore.Flows",
        "OrchardCore.Widgets",
        "OrchardCore.Workflows",
        "OrchardCore.Workflows.Http"
      ]
    }
  ]
}

Form Element Content

SelectPart.Options is an array of SelectOption objects, not newline text:

{
  "ContentType": "Select",
  "FormInputElementPart": {
    "Name": "ContactReason"
  },
  "FormElementPart": {
    "Id": "contact-reason"
  },
  "SelectPart": {
    "Editor": "Dropdown",
    "DefaultValue": "support",
    "Options": [
      {
        "Text": "Technical support",
        "Value": "support"
      },
      {
        "Text": "Sales",
        "Value": "sales"
      }
    ]
  }
}

Workflow Submission and Validation

Set the form action to a workflow HTTP endpoint and start the workflow with the real HttpRequestEvent; FormSubmissionEvent is not an Orchard Core activity. FormPart.WorkflowTypeId exists on the model, but the built-in editor does not render an input for it; set it through code or imported data when needed. It does not replace an HTTP event route.

Forms supplies these validation activities when OrchardCore.Workflows is enabled:

• ValidateAntiforgeryTokenTask
• BindModelStateTask
• ValidateFormFieldTask
• AddModelValidationErrorTask
• ValidateFormTask
• HttpRedirectToFormLocationTask

In JavaScript workflow expressions, use the HTTP globals requestForm(name) or deserializeRequestData() and workflow globals property(name), setProperty(name, value), and setOutcome(name). Do not use fictional requestFormAsDict, addModelError, or modelState globals.

var email = requestForm("ContactEmail");

if (!email || !email.includes("@")) {
    setOutcome("Invalid");
} else {
    setProperty("ContactEmail", email);
    setOutcome("Valid");
}

For required fields and model-state errors, add ValidateFormFieldTask or AddModelValidationErrorTask in the workflow and then use ValidateFormTask to branch to its Valid or Invalid outcome.

Custom Form Elements

Custom elements are ordinary content parts and widgets. Add the part, display driver, view model, and content type definition; use FormInputElementPart.Name when the element must submit a value. View models remain unsealed for model binding; seal other classes.