如何延长JsonResult
?假设我想创建JsonTransactionResult
,因为我想强制执行所有事务以返回jsonified TransactionResult
对象。 TransactionResult
对象包含错误消息和内容的数据。我是通过继承还是包装JsonResult
?
答案 0 :(得分:3)
我只是从JsonResult继承并返回TransactionResult
类的实例。
我有类似的东西,虽然我从ActionResult继承并使用JSON.NET,因为我使用内置的JsonResult与DateTime有一些序列化问题。
/// <summary>
/// A Newtonsoft.Json based JsonResult for ASP.NET MVC
/// </summary>
public class JsonNetResult : ActionResult
{
/// <summary>
/// Initializes a new instance of the <see cref="JsonNetResult"/> class.
/// </summary>
public JsonNetResult()
{
this.SerializerSettings = new JsonSerializerSettings();
}
/// <summary>
/// Gets or sets the content encoding.
/// </summary>
/// <value>The content encoding.</value>
public Encoding ContentEncoding { get; set; }
/// <summary>
/// Gets or sets the type of the content.
/// </summary>
/// <value>The type of the content.</value>
public string ContentType { get; set; }
/// <summary>
/// Gets or sets the data.
/// </summary>
/// <value>The data object.</value>
public object Data { get; set; }
/// <summary>
/// Gets or sets the serializer settings.
/// </summary>
/// <value>The serializer settings.</value>
public JsonSerializerSettings SerializerSettings { get; set; }
/// <summary>
/// Gets or sets the formatting.
/// </summary>
/// <value>The formatting.</value>
public Formatting Formatting { get; set; }
/// <summary>
/// Enables processing of the result of an action method by a custom type that inherits from the <see cref="T:System.Web.Mvc.ActionResult"/> class.
/// </summary>
/// <param name="context">The context in which the result is executed. The context information includes the controller, HTTP content, request context, and route data.</param>
public override void ExecuteResult(ControllerContext context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
HttpResponseBase response = context.HttpContext.Response;
response.ContentType = !String.IsNullOrWhiteSpace(this.ContentType) ? this.ContentType : "application/json";
if (this.ContentEncoding != null)
{
response.ContentEncoding = this.ContentEncoding;
}
if (this.Data != null)
{
JsonTextWriter writer = new JsonTextWriter(response.Output) { Formatting = this.Formatting };
JsonSerializer serializer = JsonSerializer.Create(this.SerializerSettings);
serializer.Serialize(writer, this.Data);
writer.Flush();
}
}
}
然后我从该类继承,用结果包装成功属性:
/// <summary>
/// Derives from <see cref="JsonNetResult"/>. This action result can be used to wrap an AJAX callback result with a status code and a description, along with the actual data.
/// </summary>
public class CallbackJsonResult : JsonNetResult
{
/// <summary>
/// Initializes a new instance of the <see cref="CallbackJsonResult"/> class.
/// </summary>
/// <param name="statusCode">The status code.</param>
public CallbackJsonResult(HttpStatusCode statusCode)
{
this.Initialize(statusCode, null, null);
}
/// <summary>
/// Initializes a new instance of the <see cref="CallbackJsonResult"/> class.
/// </summary>
/// <param name="statusCode">The status code.</param>
/// <param name="description">The description.</param>
public CallbackJsonResult(HttpStatusCode statusCode, string description)
{
this.Initialize(statusCode, description, null);
}
/// <summary>
/// Initializes a new instance of the <see cref="CallbackJsonResult"/> class.
/// </summary>
/// <param name="statusCode">The status code.</param>
/// <param name="data">The callback result data.</param>
public CallbackJsonResult(HttpStatusCode statusCode, object data)
{
this.Initialize(statusCode, null, data);
}
/// <summary>
/// Initializes a new instance of the <see cref="CallbackJsonResult"/> class.
/// </summary>
/// <param name="statusCode">The status code.</param>
/// <param name="description">The description.</param>
/// <param name="data">The callback result data.</param>
public CallbackJsonResult(HttpStatusCode statusCode, string description, object data)
{
this.Initialize(statusCode, description, data);
}
/// <summary>
/// Initializes this instance.
/// </summary>
/// <param name="statusCode">The status code.</param>
/// <param name="description">The description.</param>
/// <param name="data">The callback result data.</param>
private void Initialize(HttpStatusCode statusCode, string description, object data)
{
Data = new { Success = statusCode == HttpStatusCode.OK, Status = (int)statusCode, Description = description, Data = data };
}
}