我正在使用 Jqgrid 使用 asp.net 中的 Web 服务将我的数据显示到 jqgrid 中......但它仅在我在查询中给出限制时加载。如果我想在代码中使用第二个 commneted 查询加载所有数据然后它没有加载并给出错误“消息”：“使用 JSON JavaScriptSerializer 进行序列化或反序列化时出错。字符串的长度超过了 maxJsonLength 属性上设置的值。”
这是我的整个模块架构...
index.aspx 页面...
<script type="text/javascript">
$(function () {
$("#table").jqGrid({
datatype: function (pdata) { getData(pdata); },
height: 500,
colNames: ['username', 'ordinal', 'authcode', 'extension', 'trunk', 'dialnumber', 'dialdate', 'dialtime', 'duration', 'destination', 'price', 'toc'],
colModel: [
{ name: 'username', width: 100, sortable: true, align: 'center' },
{ name: 'ordinal', width: 100, sortable: true, align: 'center' },
{ name: 'authcode', width: 100, sortable: true },
{ name: 'extension', width: 100, sortable: true, align: 'center' },
{ name: 'trunk', width: 100, sortable: true, align: 'center' },
{ name: 'dialnumber', width: 100, sortable: true, align: 'center' },
{ name: 'dialdate', width: 100, sortable: true, align: 'center' },
{ name: 'dialtime', width: 100, sortable: true, align: 'center' },
{ name: 'duration', width: 100, sortable: true, align: 'center' },
{ name: 'destination', width: 100, sortable: true, align: 'center' },
{ name: 'price', width: 100, sortable: true, align: 'center' },
{ name: 'toc', width: 100, sortable: true, align: 'center' }
],
rowNum: 100,
rowList: [100, 200, 300],
pager: '#UsersGridPager',
sortname: 'username',
sortable: true,
viewrecords: true,
sortorder: 'asc',
shrinkToFit: false,
rownumbers: true,
loadtext: 'Loading..'
});
jQuery("#table").jqGrid('navGrid', '#UsersGridPager', { add: false, edit: false, del: false, search: true, refresh: true });
});
function getData(pData) {
$.ajax({
type: 'POST',
contentType: "application/json; charset=utf-8",
url: '<%= ResolveClientUrl("~/WebService.asmx/GetListOfPersons") %>',
data: '{}',
dataType: "json",
success: function (data, textStatus) {
if (textStatus == "success")
ReceivedClientData(JSON.parse(getMain(data)).rows);
},
error: function (data, textStatus) {
alert('An error has occured retrieving data!');
}
});
}
function ReceivedClientData(data) {
var thegrid = $("#table");
thegrid.clearGridData();
for (var i = 0; i < data.length; i++)
thegrid.addRowData(i + 1, data[i]);
}
function getMain(dObj) {
if (dObj.hasOwnProperty('d'))
return dObj.d;
else
return dObj;
}
</script>
JsonHelper.cs 文件
// Convert Object to Json String
// <param name="obj">The object to convert</param>
// <returns>Json representation of the Object in string</returns>
public static string ToJson(object obj)
{
return Newtonsoft.Json.JsonConvert.SerializeObject(obj);
}
public static List<Person> GetPersons()
{
List<Person> persons = new List<Person>();
string connectionString = "Server=localhost;Port=3306;Database=projecttt;UID=root;Pwd=techsoft;pooling=false";
MySqlConnection conn;
conn = new MySqlConnection(connectionString);
conn.Open();
string s = "SELECT username,ordinal,authcode,extension,trunk,dialnumber,dialdate,dialtime,duration,destination,price,toc FROM processeddata_table order by username limit 0,200";
// string s = "SELECT username,ordinal,authcode,extension,trunk,dialnumber,dialdate,dialtime,duration,destination,price,toc FROM processeddata_table ";
MySqlCommand cmd = new MySqlCommand(s,conn);
cmd.ExecuteNonQuery();
using (MySqlDataReader dr = cmd.ExecuteReader())
{
while (dr.Read())
{
persons.Add(new Person()
{
username = Convert.ToString(dr["username"]),
ordinal = Convert.ToString(dr["ordinal"]),
authcode = Convert.ToString(dr["authcode"]),
extension = Convert.ToString(dr["extension"]),
trunk = Convert.ToString(dr["trunk"]),
dialnumber = Convert.ToString(dr["dialnumber"]),
dialdate = Convert.ToString(dr["dialdate"]),
dialtime = Convert.ToString(dr["dialtime"]),
duration = Convert.ToString(dr["duration"]),
destination = Convert.ToString(dr["destination"]),
price = Convert.ToString(dr["price"]),
toc = Convert.ToString(dr["toc"])
});
}
}
return persons;
}
}
PagedList.cs 文件
IEnumerable _rows;
int _totalRecords;
int _pageIndex;
int _pageSize;
object _userData;
public PagedList(IEnumerable rows, int totalRecords, int pageIndex, int pageSize, object userData)
{
_rows = rows;
_totalRecords = totalRecords;
_pageIndex = pageIndex;
_pageSize = pageSize;
_userData = userData;
}
public PagedList(IEnumerable rows, int totalRecords, int pageIndex, int pageSize)
: this(rows, totalRecords, pageIndex, pageSize, null)
{
}
public int total { get { return (int)Math.Ceiling((decimal)_totalRecords / (decimal)_pageSize); } }
public int page { get { return _pageIndex; } }
public int records { get { return _totalRecords; } }
public IEnumerable rows { get { return _rows; } }
public object userData { get { return _userData; } }
public override string ToString()
{
return Newtonsoft.Json.JsonConvert.SerializeObject(this);
}
}
网络服务.cs
[WebMethod]
[ScriptMethod]
public string GetListOfPersons()
{
List<Person> persons = JsonHelper.GetPersons();
return Newtonsoft.Json.JsonConvert.SerializeObject(new PagedList(persons, persons.Count, 1, persons.Count));
}
}
个人.cs
public string username { get; set; }
public string ordinal { get; set; }
public string authcode { get; set; }
public string extension { get; set; }
public string trunk { get; set; }
public string dialnumber { get; set; }
public string dialdate { get; set; }
public string dialtime { get; set; }
public string duration { get; set; }
public string destination { get; set; }
public string price { get; set; }
public string toc { get; set; }
请大家帮我.Thanx提前..