Asp.net mvc 如何在MVC4API中漂亮地打印JSON脚本

如何使用MVC4API获得以下JSON响应，使其看起来更干净。这是一个JSON示例

{"Name":"Apple","Expiry":"2008-12-28T00:00:00","Price":3.99}

漂亮的JSON

{
  "Name":"Apple",
  "Expiry":"2008-12-28T00:00:00",
  "Price":3.99
}

您可以使用NuGet软件包执行此操作：

JObject.Parse(json).ToString(Formatting.Indented)

---

如果它是一个要序列化为JSON的对象，那么只需添加一个参数来“美化”它

---

如果您使用的是Web Api。您可以设置：

var json = GlobalConfiguration.Configuration.Formatters.JsonFormatter;
json.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented;

---

动机：如果查询字符串包含单词

prettyprint

或

prettyprint=true

，则如果查询字符串中没有单词

prettyprint

，或

prettyprint=false

，则不要进行漂亮打印

注意：此筛选器检查每个请求中是否有漂亮的打印。默认情况下关闭“漂亮打印”功能非常重要，仅在请求时启用

步骤1：定义自定义操作筛选器属性，如下所示

public class PrettyPrintFilterAttribute : ActionFilterAttribute
{
    /// <summary>
    /// Constant for the query string key word
    /// </summary>
    const string prettyPrintConstant = "prettyprint";

    /// <summary>
    /// Interceptor that parses the query string and pretty prints 
    /// </summary>
    /// <param name="actionExecutedContext"></param>
    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {            
        JsonMediaTypeFormatter jsonFormatter = actionExecutedContext.ActionContext.RequestContext.Configuration.Formatters.JsonFormatter;
        jsonFormatter.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.None;

        var queryString = actionExecutedContext.ActionContext.Request.RequestUri.Query;
        if (!String.IsNullOrWhiteSpace(queryString))
        {
            string prettyPrint = HttpUtility.ParseQueryString(queryString.ToLower().Substring(1))[prettyPrintConstant];
            bool canPrettyPrint;
            if ((string.IsNullOrEmpty(prettyPrint) && queryString.ToLower().Contains(prettyPrintConstant)) ||
                Boolean.TryParse(prettyPrint, out canPrettyPrint) && canPrettyPrint)
            {                    
                jsonFormatter.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented;
            }
        }
        base.OnActionExecuted(actionExecutedContext);
    }
}

您可以在此周围添加

#if DEBUG

和

#endif

，因此这仅在调试时使用

public class PrettyPrintFilterAttribute : ActionFilterAttribute
{
    /// <summary>
    /// Constant for the query string key word
    /// </summary>
    const string prettyPrintConstant = "prettyprint";

    /// <summary>
    /// Interceptor that parses the query string and pretty prints 
    /// </summary>
    /// <param name="actionExecutedContext"></param>
    public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
    {            
        JsonMediaTypeFormatter jsonFormatter = actionExecutedContext.ActionContext.RequestContext.Configuration.Formatters.JsonFormatter;
        jsonFormatter.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.None;

        var queryString = actionExecutedContext.ActionContext.Request.RequestUri.Query;
        if (!String.IsNullOrWhiteSpace(queryString))
        {
            string prettyPrint = HttpUtility.ParseQueryString(queryString.ToLower().Substring(1))[prettyPrintConstant];
            bool canPrettyPrint;
            if ((string.IsNullOrEmpty(prettyPrint) && queryString.ToLower().Contains(prettyPrintConstant)) ||
                Boolean.TryParse(prettyPrint, out canPrettyPrint) && canPrettyPrint)
            {                    
                jsonFormatter.SerializerSettings.Formatting = Newtonsoft.Json.Formatting.Indented;
            }
        }
        base.OnActionExecuted(actionExecutedContext);
    }
}

public static void Register(HttpConfiguration config)
    {            
        config.Filters.Add(new PrettyPrintFilterAttribute());       
    }