# Class SystemTextDefaultValueJsonConverter

OptimaJet.Workflow.Core.Designer.SystemTextDefaultValueJsonConverter

Provides a [JsonConverter<T>](https://learn.microsoft.com/dotnet/api/system.text.json.serialization.jsonconverter-1) that converts [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/) between its string representation and JSON values.

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

```csharp
public class SystemTextDefaultValueJsonConverter : JsonConverter<string?>
```

## Type Hierarchy

-   [JsonConverter](https://learn.microsoft.com/dotnet/api/system.text.json.serialization.jsonconverter)
    -   [JsonConverter<string>](https://learn.microsoft.com/dotnet/api/system.text.json.serialization.jsonconverter-1)
        -   SystemTextDefaultValueJsonConverter Current type

## Methods

`public override string? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)` 

Reads a JSON value into the string representation used by [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/).

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `reader` | `Utf8JsonReader` | The [Utf8JsonReader](https://learn.microsoft.com/dotnet/api/system.text.json.utf8jsonreader) positioned at the value to read. |
| `typeToConvert` | `Type` | The target [Type](https://learn.microsoft.com/dotnet/api/system.type). |
| `options` | `JsonSerializerOptions` | The [JsonSerializerOptions](https://learn.microsoft.com/dotnet/api/system.text.json.jsonserializeroptions) for the deserialization operation. |

### Returns

| Type | Description |
| --- | --- |
| `String` | The JSON string value, the raw JSON text for a non-string value, or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) when the current token is [JsonTokenType.Null](https://learn.microsoft.com/dotnet/api/system.text.json.jsontokentype#system-text-json-jsontokentype-null). |

`public override void Write(Utf8JsonWriter writer, string? value, JsonSerializerOptions options)` 

Writes the JSON representation of [CodeActionParameterDefinition.DefaultValue](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Model/CodeActionParameterDefinition/).

### Parameters

| Name | Type | Description |
| --- | --- | --- |
| `writer` | `Utf8JsonWriter` | The [Utf8JsonWriter](https://learn.microsoft.com/dotnet/api/system.text.json.utf8jsonwriter) that receives the JSON value. |
| `value` | `String` | The [string](https://learn.microsoft.com/dotnet/api/system.string) value to serialize, or [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null) to write JSON [null](https://learn.microsoft.com/dotnet/csharp/language-reference/keywords/null). |
| `options` | `JsonSerializerOptions` | The [JsonSerializerOptions](https://learn.microsoft.com/dotnet/api/system.text.json.jsonserializeroptions) for the serialization operation. |

[Previous SystemStringEnumConverter<T>](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Designer/SystemStringEnumConverter-T/) [Next SystemTextStringTypeConverter](https://api.workflowengine.io/core/OptimaJet.Workflow.Core.Designer/SystemTextStringTypeConverter/)