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我正在尝试从调用简单 Web 服务的数据库将数据加载到 DataTables。出于某种原因,我有 500 Internal Server Error 。我已经测试了 Web 服务,它按预期返回数据。谢谢

 [WebMethod(EnableSession = true)]
public string DataFromDB()
{
    scansedDBEntities _db = new scansedDBEntities();
    var query = from p in _db.Names
                select p;

    return JsonConvert.SerializeObject(query);
}

和 JavaScript:

 $('#tblNames').dataTable({
    "bProcessing": true,
    "bServerSide": true,
    "sAjaxSource": "../SSService.asmx/DataFromDB",
     }
});
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