使用JSON.. NET序列化JSON数据- extjs
本文关键字:JSON extjs 数据 序列化 NET 使用 | 更新日期: 2023-09-27 18:02:06
我需要做的是加载用extjs4创建的饼状数据图,其中包含来自数据库的数据存储接受这些数据,因此我需要以如下格式返回数据:
var data = [{ name: "Low", data1: "20", data2: "54", data3: "63", data4: "12" },
{ name: "Moderate", data1: "2", data2: "74", data3: "13", data4: "25" },
{ name: "Critical", data1: "42", data2: "17", data3: "3", data4: "20" },
{ name: "High", data1: "25", data2: "14", data3: "23", data4: "52"}];
所以我试图这样做在c#与json.net,我创建了一个类。cs,并把我的查询,以获得我需要的数据:
namespace charts
{
public class lineChartClass
{
public String piedata()
{
{//..my queries in here..//}
double[] data = new double[4] ;
//data = "{ name: '"Low'", data1: " + lowtotal + "}" + ",{ name: '"Moderate'", data1: " + moderatetotal + "}" + ",{ name: '"Critical'", data1: " + criticaltotal + "}" + ",{ name: '"High'", data1: " + hightotal + "}";
data[0]=lowtotal;
data[1] = moderatetotal;
data[2] = criticaltotal;
data[3] = hightotal;
return data;
}//eo piedata
}
public class ChartItem
{
public string Name { get; set; }
public string Data1 { get; set; }
}
}
并创建了我的处理程序。转换为json:namespace charts {
public class lineChartData : IHttpHandler
{
static string ConvertToJson()
{
List<ChartItem> chartItems = new List<ChartItem>();
chartItems.Add(new ChartItem() { Name = "Low", Data1 = json[0].ToString() });
chartItems.Add(new ChartItem() { Name = "Moderate", Data1 = json[1].ToString() });
chartItems.Add(new ChartItem() { Name = "Critical", Data1 = json[2].ToString() });
chartItems.Add(new ChartItem() { Name = "High", Data1 = json[3].ToString() });
string result = new JavaScriptSerializer().Serialize(chartItems);
return result;
}
}
}
然后在我的chart.js中我这样调用它:
var obj= new lineChartData();
window.store1 = Ext.create('Ext.data.JsonStore', {
fields: ['name', 'dat1', 'data2', 'data3', 'data4'],
data: obj.ConvertToJson()//generateData()
});
但是我得到这个错误:
Uncaught ReferenceError: lineChartData is not defined
lineChartData.ashxGET http://localhost/lineChartData.ashx?proxy 500 (Internal Server Error)
我刚开始学习c#和extjs,不知道如何使用json.net
提前感谢您的时间
为什么不在客户端和服务器端同时使用标准版本的JSON序列化工具呢?ASP。. NET有JavaScriptSerializer类&JavaScript有JSON对象(原生的ECMAScript 5和旧版本的插件,由Douglas Crockford编写)。
要在服务器端将Object转换为JSON,可以使用:
string objectJson = new JavaScriptSerializer().Serialize(yourObject);
要在客户端将对象序列化为JSON,可以使用:
string objectJson = JSON.stringify(yourObject);
要在客户端将JSON字符串反序列化为对象,可以使用:
var yourObject = JSON.parse(objectJson);
因此,你可以有一个类来表示你的图表项目在server:
public class ChartItem
{
public string Name {get;set;}
public string Data1 {get;set;}
public string Data2 {get;set;}
public string Data3 {get;set;}
public string Data4 {get;set;}
}
并在' ConvertToJson'方法中使用它,如下所示:
List<ChartItem> chartItems = new List<ChartItem>();
// add as many item as you wish to this list
chartItems.Add(new ChartItem(){ Name = "Something", Data1 = "data1", Data2 = "data2", Data3 = "data3", Data4 = "data4 });
string result = new JavaScriptSerialize().Serialize(chartItems);
return result;
您是否在您的网页中添加了它们?正确配置:
<httpHandlers>
<add verb="GET" path="lineChartData.ashx" type="charts.lineChartData"/>
</httpHandlers>