# Class CodeActionParameterDefinition

OptimaJet.Workflow.Core.Model.CodeActionParameterDefinition

Defines a field that Workflow Designer renders in a structured parameter form for an action, condition, rule, or custom activity.

Namespace: [OptimaJet.Workflow.Core.Model](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/)

```csharp
public class CodeActionParameterDefinition
```

## Constructors

`public CodeActionParameterDefinition()` 

Initializes a new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) with an empty [CodeActionParameterDefinition.DropdownValues](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) collection.

## Properties

`public string Title { get; set; }` 

Gets or sets the label displayed for the field.

`public string Name { get; set; }` 

Gets or sets the name that identifies the field in the serialized parameter data.

`[JsonConverter(typeof(StringEnumConverter))] [JsonProperty(DefaultValueHandling = DefaultValueHandling.Populate)] [JsonConverter(typeof(SystemStringEnumConverter<ParameterType>))] public ParameterType Type { get; set; }` 

Gets or sets the [ParameterType](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/) that determines how Workflow Designer renders the field.

`public bool IsRequired { get; set; }` 

Gets or sets a value indicating whether Workflow Designer requires a value for the field.

`public List<DropdownValue> DropdownValues { get; set; }` 

Gets or sets the [DropdownValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DropdownValue/) options available for [ParameterType.Dropdown](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/) and [ParameterType.MultiSelect](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/) fields.

`[JsonConverter(typeof(NewtonsoftDefaultValueJsonConverter))] [JsonConverter(typeof(SystemTextDefaultValueJsonConverter))] public string DefaultValue { get; set; }` 

Gets or sets the default field value encoded in the representation expected for [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/).

`public string Comment { get; set; }` 

Gets or sets explanatory text displayed with the field.

`public string CustomName { get; set; }` 

Gets or sets the name of the custom parameter control rendered when [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Custom](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/).

## Methods

`public CodeActionParameterDefinition Clone()` 

Creates a copy of this definition and clones each [DropdownValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DropdownValue/) in [CodeActionParameterDefinition.DropdownValues](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/).

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) containing the copied values. |

### Exceptions

| Type | Description |
| --- | --- |
| `NullReferenceException` | Thrown when [CodeActionParameterDefinition.DropdownValues](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) or contains a [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) entry. |

`public static CodeActionParameterDefinition CreateTextParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a text parameter definition.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial text stored in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Text](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

`public static CodeActionParameterDefinition CreateNumberParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a numeric parameter definition.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial numeric value encoded as text in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Number](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

`public static CodeActionParameterDefinition CreateCheckboxParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a parameter definition rendered as a check box.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial [bool](https://learn.microsoft.com/dotnet/api/system.boolean) value encoded as text in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Checkbox](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

`public static CodeActionParameterDefinition CreateDropdownParameter(string name, Dictionary<string, string> values, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a single-selection parameter definition from a set of option mappings.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `values` | `Dictionary<String, String>` | The option mappings whose keys initialize [DropdownValue.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DropdownValue/) and whose values initialize [DropdownValue.Value](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DropdownValue/). |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The option value stored in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and selected initially. |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Dropdown](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/) and whose [CodeActionParameterDefinition.DropdownValues](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) are populated from `values`. |

### Exceptions

| Type | Description |
| --- | --- |
| `ArgumentNullException` | Thrown when `values` is [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null). |

`public static CodeActionParameterDefinition CreateMultiSelectParameter(string name, Dictionary<string, string> values, string title = null, bool isRequired = false, List<string> defaultValue = null, string comment = "")` 

Creates a multiple-selection parameter definition from a set of option mappings.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `values` | `Dictionary<String, String>` | The option mappings whose keys initialize [DropdownValue.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DropdownValue/) and whose values initialize [DropdownValue.Value](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/DropdownValue/). |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `List<String>` | The option values serialized as JSON and stored in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). Use [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) or an empty list to store an empty string. |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.MultiSelect](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/) and whose [CodeActionParameterDefinition.DropdownValues](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) are populated from `values`. |

### Exceptions

| Type | Description |
| --- | --- |
| `ArgumentNullException` | Thrown when `values` is [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null). |

`public static CodeActionParameterDefinition CreateDateTimeParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a date-and-time parameter definition.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial date and time encoded as text in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.DateTime](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

`public static CodeActionParameterDefinition CreateDateParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a date parameter definition.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial date encoded as text in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Date](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

`public static CodeActionParameterDefinition CreateTimeParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a time parameter definition.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial time encoded as text in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Time](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

`public static CodeActionParameterDefinition CreateJsonParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a JSON parameter definition.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial JSON text stored in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.Json](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

`public static CodeActionParameterDefinition CreateTextAreaParameter(string name, string title = null, bool isRequired = false, string defaultValue = "", string comment = "")` 

Creates a multiline text parameter definition.

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `name` | `String` | The name stored in [CodeActionParameterDefinition.Name](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and used to identify the field in parameter data. |
| `title` | `String` | The label stored in [CodeActionParameterDefinition.Title](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/), or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to use `name`. |
| `isRequired` | `Boolean` | [true](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool) to set [CodeActionParameterDefinition.IsRequired](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) and require a field value; otherwise, [false](https://learn.microsoft.com/dotnet/csharp/language-reference/builtin-types/bool). |
| `defaultValue` | `String` | The initial multiline text stored in [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |
| `comment` | `String` | The explanatory text stored in [CodeActionParameterDefinition.Comment](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/). |

### Returns

| Type | Description |
| --- | --- |
| `CodeActionParameterDefinition` | A new [CodeActionParameterDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) whose [CodeActionParameterDefinition.Type](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) is [ParameterType.TextArea](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/ParameterType/). |

[Previous CodeActionDefinition](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionDefinition/) [Next CodeActionType](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionType/)