从C#生成json的最佳方式是什么

Controller类有一个Json方法，该方法将对象序列化为JSON，因此在您的操作方法中，您只需创建对象并调用该方法：

public ActionResult GetData() {
  return Json(
    new {
      page = 1,
      total = 1,
      records = 2,
      rows = new[] {
        new { id = 1, cell = new object[] { "1", "Super Item", "300", 0, null, false, false } },
        new { id = 2, cell = new object[] { "2", "Item 1", "100", 1, 1, false, false } },
        new { id = 3, cell = new object[] { "3", "Sub Item 1", "50", 2, 2, true, true } },
        new { id = 4, cell = new object[] { "4", "Sub Item 2", "25", 2, 2, false, false } },
        new { id = 5, cell = new object[] { "5", "Sub-sub Item 1", "25", 3, 4, true, true } },
        new { id = 6, cell = new object[] { "6", "Sub Item 3", "25", 2, 2, true, true } },
        new { id = 7, cell = new object[] { "7", "Item 2", "200", 1, 1, false, false } },
        new { id = 8, cell = new object[] { "8", "Sub Item 1", "100", 2, 7, false, false } },
        new { id = 9, cell = new object[] { "9", "Sub-sub Item 1", "50", 3, 8, true, true } },
        new { id = 10, cell = new object[] { "10", "Sub-sub Item 2", "50", 3, 8, true, true } },
        new { id = 11, cell = new object[] { "11", "Sub Item 2", "100", 2, 7, true, true } }
      }
    } 
  );
}

.Net 2+中内置了一个名为"JavaScriptSerializer"的类，该类基于.Net类型的类创建JSON结构化字符串。

使用序列化程序，您可以简单地创建一个具有属性和集合的类来表示JSON数据。在.Net服务器端代码中创建一个实例，然后使用序列化程序进行响应，以生成有效的JSON字符串响应。

下面是一个将Person类实例转换为序列化JSON字符串的示例；

JavaScriptSerializer js = new JavaScriptSerializer();
Person p1 = new Person();
p1.firstName = "Brian";
p1.lastName = "Scott";
p1.department = "Microsoft";
p1.address.addressline1 = "Microsoft";
p1.address.addressline2 = "";
p1.address.city = "Redmond";
p1.address.state = "Seattle";
p1.address.country = "America";
p1.address.pin = 560028;
p1.technologies = new string[] { "IIS", "ASP.NET", "JavaScript", "AJAX" };
string strJSON = js.Serialize(p1);

这将生成一个有效的 JSON字符串

{"firstName":"Brian","lastName":"Scott","department":"Microsoft","address":{"addressline1":"Microsoft","addressline2":"","city":"Redmond","state":"Seattle","country":"America","pin":560028},"technologies":["IIS","ASP.NET","JavaScript","AJAX"]}

如果您打算使用Web服务来生成对客户端的JSON响应，那么您可以将您的方法标记为；

[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public string GetPersonJSON()
{
    JavaScriptSerializer js = new JavaScriptSerializer();
    Person p1 = new Person();
p1.firstName = "Brian";
p1.lastName = "Scott";
p1.department = "Microsoft";
p1.address.addressline1 = "Microsoft";
p1.address.addressline2 = "";
p1.address.city = "Redmond";
p1.address.state = "Seattle";
p1.address.country = "America";
p1.address.pin = 560028;
p1.technologies = new string[] { "IIS", "ASP.NET", "JavaScript", "AJAX" };
return js.Serialize(p1);
}

显然，您正在尝试填充jqGrid，而您正在使用ASP.NET MVC。如果您为这些值定义了一个类：

["1", "Super Item", "300", 0, null, false, false]

您可以将所有元素存储在集合myCollection
中你可以这样做：

var ReturnData = new
    {
        total = totalPages,
        page = page,
        records = totalRecords,
        rows = myCollection.Select(r => new
        {
            id = r.Id.ToString(),
            cell = new String[] { r.Field1, r.Field2, r.Field3, r.Field4 }
        })
        };
return (Json(ReturnData, JsonRequestBehavior.DenyGet));

class Row {
   public int id {get;set;}
   public object[] cell {get;set;}
}
class Data {
  public int page {get;set;}
  public int total {get;set;}
  public int records {get;set;}
  public Row[] rows {get;set;}
}
var myData = new Data(){ .... };
var json =  new System.Web.Script.Serialization.JavaScriptSerializer().Serialize(myData);