在.NET中使用Jayrock错误地形成了JSON字符串

Question

我正在尝试使用Jayrock.JSON从aspx页面返回一个JSON对象。

using (JsonTextWriter writer = new JsonTextWriter(Response.Output))
    {
        writer.WriteStartObject();
        for (int i = 0; i < rdr.FieldCount; i++)
        {
            writer.WriteMember(rdr.GetName(i).ToString());
            writer.WriteString(rdr[i].ToString());
        }
        writer.WriteEndObject();
    }

这是在一个rdr.Read()循环中。

输出的JSON如下所示：(尽管我手动添加了换行符)

{
"BugID":"1087",
"AddedBy":"",
"BugDate":"5/2/2010 9:45:34 AM",
"BugTitle":"/admin/ajax_thirdpartylog.asp",
"Classify":""
,"ErrPage":"/admin/ajax_thirdpartylog.asp",
"StoreID":"71",
"UserID":"15438",
"ErrDesc":"Type mismatch: 'formatnumber'",
"ErrDump":"*** VARIABLES DUMP ***\r\n\r\n*** Form Variables ***\r\n\r\ncalmonth : 8\r\ncalmonth2 : 8\r\nfromdate : 8/1/2009\r\ncalyear : 2009\r\ntodate : 8/31/2009\r\ncalyear2 : 2009\r\nr : 978402\r\nthirdtype : 1\r\nButton : Generate Third Party Log\r\n\r\n*** Query String Variables ***\r\n\r\n\r\n\r\n*** REPORT END ***\r\n",
"ErrLine":"74",
"DateFixed":"",
"Counter":"16",
"AssignTo":""
 }
 {
"BugID":"1086",
"AddedBy":"",
"BugDate":"5/1/2010 11:58:54 PM",
"BugTitle":"/admin/Charts/monthsales_s.asp",
"Classify":"",
"ErrPage":"/admin/Charts/monthsales_s.asp",
"StoreID":"402",
"UserID":"141928",
"ErrDesc":"Script timed out",
"ErrDump":"*** VARIABLES DUMP ***\r\n\r\n*** Form Variables ***\r\n\r\n\r\n*** Query String Variables ***\r\n\r\nmonth1 : 9/1/2009\r\nr : 75333803\r\n\r\n\r\n*** REPORT END ***\r\n",
"ErrLine":"0",
"DateFixed":"",
"Counter":"",
"AssignTo":""
 }

我真的不确定我做错了什么，但是在我阅读这个JSON的页面上，当我尝试使用.evalJSON (使用prototypejs)时，我收到错误，说JSON格式不正确。有没有人能建议我改什么？

Answer 1

这一点：

"AssignTo":"" 
 } 
 { 

是无效的JSON。您可以在JSON Lint中输入一个字符串来查看它是否有效。我不确定这应该是什么样子，但一个空对象应该是这样的(不需要""，括号颠倒，缺少逗号)：

"AssignTo": 
 { 
 }, 

Answer 2

问题是您正在编写多个JSON对象，而您可能要做的是生成一个JSON对象的JSON数组。根据您的代码片段，我假设rdr包含一些像SqlDataReader这样的IDataReader实现。如果这是真的，那么您需要修改代码，以开始和结束外部读取循环周围的JSON数组，如下所示：

using (JsonTextWriter writer = new JsonTextWriter(Response.Output))
{        
    writer.WriteStartArray();
    while (rdr.Read())
    {
        writer.WriteStartObject();
        for (int i = 0; i < rdr.FieldCount; i++)
        {
            writer.WriteMember(rdr.GetName(i).ToString());
            writer.WriteString(rdr[i].ToString());
        }
        writer.WriteEndObject();
    }
    writer.WriteEndArray();
}

当在JSON数组中时，Jayrock会自动用逗号(，)分隔每个JSON对象值，所以现在输出应该类似于以下有效的JSON：

[
    {
        "BugID":"1087",
        "AddedBy":"",
        "BugDate":"5/2/2010 9:45:34 AM",
        "BugTitle":"/admin/ajax_thirdpartylog.asp",
        "Classify":""
        ,"ErrPage":"/admin/ajax_thirdpartylog.asp",
        "StoreID":"71",
        "UserID":"15438",
        "ErrDesc":"Type mismatch: 'formatnumber'",
        "ErrDump":"*** VARIABLES DUMP ***\r\n\r\n*** Form Variables ***\r\n\r\ncalmonth : 8\r\ncalmonth2 : 8\r\nfromdate : 8/1/2009\r\ncalyear : 2009\r\ntodate : 8/31/2009\r\ncalyear2 : 2009\r\nr : 978402\r\nthirdtype : 1\r\nButton : Generate Third Party Log\r\n\r\n*** Query String Variables ***\r\n\r\n\r\n\r\n*** REPORT END ***\r\n",
        "ErrLine":"74",
        "DateFixed":"",
        "Counter":"16",
        "AssignTo":""
    },
    {
        "BugID":"1086",
        "AddedBy":"",
        "BugDate":"5/1/2010 11:58:54 PM",
        "BugTitle":"/admin/Charts/monthsales_s.asp",
        "Classify":"",
        "ErrPage":"/admin/Charts/monthsales_s.asp",
        "StoreID":"402",
        "UserID":"141928",
        "ErrDesc":"Script timed out",
        "ErrDump":"*** VARIABLES DUMP ***\r\n\r\n*** Form Variables ***\r\n\r\n\r\n*** Query String Variables ***\r\n\r\nmonth1 : 9/1/2009\r\nr : 75333803\r\n\r\n\r\n*** REPORT END ***\r\n",
        "ErrLine":"0",
        "DateFixed":"",
        "Counter":"",
        "AssignTo":""
    }
]