哦，那里！
我几天来一直在努力解决这个问题，我真的开始对此发脾气了！
我设法将信息解析回网格，可以对其进行排序，但是当我尝试过滤结果时，它会变得有点混乱..
我已经编程了大约4-5个月的C＃，但我的Web表单，Javascript和JQuery（包括JSON）只有大约14天左右，所以也许这是我做错的基础知识 - 请!! / p>
首先，我想知道这是否是正确的JSON语法？
{"grid":{"_search":true,"nd":1291150141196,"rows":20,"page":1,"sidx":"Name","sord":"asc","filters":"{\"groupOp\":\"AND\",\"rules\":[{\"field\":\"Phone\",\"op\":\"eq\",\"data\":\"2343444\"}]}"}}
那些反斜杠对我来说似乎不对，我试过在服务器端过滤它们，但没有运气 - 再次，只有14天的经验。
错误讯息：
"System.InvalidOperationException"
"Cannot convert object of type 'System.String' to type 'Filter'"
" at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object& convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object& convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.AssignToPropertyOrField(Object propertyValue, Object o, String memberName, JavaScriptSerializer serializer, Boolean throwOnError)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertDictionaryToObject(IDictionary`2 dictionary, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object& convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeInternal(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object& convertedObject)\r\n at System.Web.Script.Serialization.ObjectConverter.ConvertObjectToTypeMain(Object o, Type type, JavaScriptSerializer serializer, Boolean throwOnError, Object& convertedObject)\r\n at System.Web.Script.Services.WebServiceMethodData.StrongTypeParameters(IDictionary`2 rawParams)\r\n at System.Web.Script.Services.WebServiceMethodData.CallMethodFromRawParams(Object target, IDictionary`2 parameters)\r\n at System.Web.Script.Services.RestHandler.InvokeMethod(HttpContext context, WebServiceMethodData methodData, IDictionary`2 rawParams)\r\n at System.Web.Script.Services.RestHandler.ExecuteWebServiceCall(HttpContext context, WebServiceMethodData methodData)"
我的WebMethod：
[WebMethod]
[ScriptMethod]
public string GetAll(GridSettings grid) {
var query = from p in dc.Customers select p;
//if (grid._search)
// if (grid.filters.groupOp == "AND")
// {
// foreach (var rule in grid.filters.Rules)
// query = query.Where<Customers>(rule.field, rule.data, rule.oper);
// }
// else if (grid.filters.groupOp == "OR")
// {
// var temp = (new List<Customers>()).AsQueryable();
// foreach (var rule in grid.filters.Rules)
// {
// var t = query.Where<Customers>(rule.field, rule.data, rule.oper);
// temp = temp.Concat<Customers>(t);
// }
// query = temp.Distinct<Customers>();
// }
query = query.OrderBy<Customers>(grid.sidx, grid.sord);
List<Customer> result = new List<Customer>();
foreach (var x in query)
{
Customer y = new Customer();
y.Phone = x.Phone;
y.Name = x.Name;
y.Address = x.Address;
y.Postal = x.Postal;
y.City = x.City;
y.Date = x.Date.ToString("dd-MM-yy");
result.Add(y);
}
return JsonConvert.SerializeObject(new PagedList(result, result.Count(), 1, 20));
}
}
即使通过我认为不一定，（服务器端不过滤atm。）：
public class Customer
{
public string Phone { get; set; }
public string Name { get; set; }
public string Address { get; set;}
public string Postal { get; set; }
public string City { get; set; }
public string Date { get; set; }
}
public class GridSettings
{
public bool _search { get; set; }
public Filter filters { get; set; }
public long nd { get; set; }
public int rows { get; set; }
public int page { get; set; }
public string sidx { get; set; }
public string sord { get; set; }
}
public class Filter
{
public string groupOp { get; set; }
public Rule[] Rules { get; set; }
public static Filter Create(string json)
{
try
{
return JsonConvert.DeserializeObject<Filter>(json);
}
catch
{
return null;
}
}
}
public class Rule
{
private Dictionary<string, WhereOperation> operations = new Dictionary<string, WhereOperation> {
{ "eq",WhereOperation.Equal },
{ "ne",WhereOperation.NotEqual },
{ "cn",WhereOperation.Contains }
};
public string field { get; set; }
public string op { set; get; }
public WhereOperation oper { get { return operations[op]; } }
public string data { get; set; }
}
public static class LinqExtensions
{
public static IQueryable<T> OrderBy<T>(this IQueryable<T> query, string sortColumn, string direction)
{
ParameterExpression parameter = Expression.Parameter(query.ElementType, "p");
MemberExpression memberAccess = null;
string methodName = string.Format("OrderBy{0}", direction.ToLower() == "asc" ? "" : "descending");
foreach (var property in sortColumn.Split('.'))
{
memberAccess = MemberExpression.Property(memberAccess ?? (parameter as Expression), property);
}
LambdaExpression orderByLambda = Expression.Lambda(memberAccess, parameter);
MethodCallExpression result = Expression.Call(
typeof(Queryable),
methodName,
new[] { query.ElementType, memberAccess.Type },
query.Expression,
Expression.Quote(orderByLambda));
return query.Provider.CreateQuery<T>(result);
}
public static IQueryable<T> Where<T>(this IQueryable<T> query, string column, object value, WhereOperation operation)
{
try
{
if (string.IsNullOrEmpty(column))
return query;
ParameterExpression parameter = Expression.Parameter(query.ElementType, "p");
MemberExpression memberAccess = null;
foreach (var property in column.Split('.'))
memberAccess = Expression.Property(memberAccess ?? (parameter as Expression), property);
if (memberAccess == null)
return query.Where(p => true);
Expression conditional = Expression.Call(null, typeof(LinqExtensions).GetMethod("Comparer"), Expression.Convert(memberAccess, typeof(object)), Expression.Convert(Expression.Constant(value), typeof(object)), Expression.Constant(operation));
MethodCallExpression result = Expression.Call(typeof(Queryable), "Where", new[] { query.ElementType }, query.Expression, Expression.Lambda(conditional, parameter));
return query.Provider.CreateQuery<T>(result);
}
catch
{
return query.Where(p => true);
}
}
public static bool Comparer(this object value1, object value2, WhereOperation operation)
{
string strValue1 = value1.ToString().ToLowerInvariant().Trim();
string strValue2 = value2.ToString().ToLowerInvariant().Trim();
double dblValue1 = -1;
double dblValue2 = -1;
bool areNumbers = double.TryParse(strValue1, out dblValue1) && double.TryParse(strValue2, out dblValue2);
switch (operation)
{
case WhereOperation.Equal:
return areNumbers ? dblValue1 == dblValue2 : strValue1 == strValue2;
case WhereOperation.NotEqual:
return areNumbers ? dblValue1 != dblValue2 : strValue1 != strValue2;
case WhereOperation.Contains:
return strValue1.Contains(strValue2);
}
return true;
}
}
public enum WhereOperation
{
Equal, NotEqual, Contains
}
public class StringValueAttribute : System.Attribute
{
private string _value;
public StringValueAttribute(string value)
{
_value = value;
}
public string Value
{
get { return _value; }
}
}
public class PagedList
{
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 JsonConvert.SerializeObject(this);
}
}
任何最终的Javascript：
$(function () {
$("#CustomerList").dialog({
autoOpen: false,
show: "explode",
width: 720,
height: 450,
open: function () {
$("#CustomerListTable").jqGrid({
datatype: function (pdata) { getListData(pdata, 'Customers', '#CustomerListTable'); },
colNames: ['Telefon', 'Navn', 'Adresse', 'Post', 'By', 'CVR'],
colModel: [
{ name: 'Phone', width: 70, sortable: true, searchoptions: { sopt: ['eq', 'ne', 'cn']} },
{ name: 'Name', width: 200, sortable: true, searchoptions: { sopt: ['eq', 'ne', 'cn']} },
{ name: 'Address', width: 200, sortable: true, searchoptions: { sopt: ['eq', 'ne', 'cn']} },
{ name: 'Postal', width: 60, sortable: true, searchoptions: { sopt: ['eq', 'ne', 'cn']} },
{ name: 'City', width: 100, sortable: true, searchoptions: { sopt: ['eq', 'ne', 'cn']} },
{ name: 'CVR', width: 70, sortable: true, searchoptions: { sopt: ['eq', 'ne', 'cn']} }
],
caption: "",
height: 360,
loadonce: true,
scroll: 1,
pager: '#CustomerListPager',
gridview: true,
sortname: 'Name',
sortorder: 'asc'
});
$("#CustomerListTable").jqGrid('navGrid', '#CustomerListPager', { del: false, add: false, edit: false }, {}, {}, {}, { multipleSearch: true });
}
});
});
function getListData(pdata, controller, table) {
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "Controls/" + controller + ".asmx/GetAll",
data: "{\"grid\":" + JSON.stringify(pdata) + "}",
dataType: "json",
success: function (data, textStatus) {
if (textStatus == "success") RecievedData(JSON.parse(getMain(data)).rows, table);
},
error: function (data, textStatus) {
alert("Error fetching data");
}
});
}
function RecievedData(data, table) {
var thegrid = $(table);
thegrid.clearGridData();
for (var i = 0; i < data.length; i++) thegrid.addRowData(i + 1, data[i]);
thegrid.removeClass("jqgrid-overlay");
}
function getMain(data) {
if (data.hasOwnProperty("d")) return data.d;
else return data;
}
我到目前为止的解决方案是Goggle的小时和小时，阅读和试验的结果......我准备好了！
哦，虽然我在这里 - 为什么在关闭/打开对话框时，jqGrid搜索按钮在#CustomerListPager中显示X次，为什么不再请求数据呢？我每次都要刷新页面 - 这主要是我使用JQuery的原因 - 我想避免这种情况;）
感谢您的时间，如果您已阅读到目前为止 - 我很欣赏这一点！
12月快乐！
尼基。
答案 0 :(得分：1)
我是这样做的，它可以加载数据，也可以轻松执行搜索。
这是调用加载jqgrid
的函数function FillGrid(WebMethodString, GridName, PagerName, columnModel, columnNames, header)
{
// debugger;
jQuery(GridName).GridUnload();
jQuery.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: WebMethodString,
data: '{}', //PageMethod Parametros de entrada
datatype: "json",
success: function(msg) {
$('#dvWait').css('display', 'block');
// Do interesting things here.
// debugger;
var mydata = jQuery.parseJSON(msg.d);
//console.log(mydata);
jQuery(GridName).jqGrid({
datatype: "local",
data: mydata,
colNames: columnNames,
colModel: columnModel,
pager: jQuery(PagerName),
rowNum: 25,
mtype: "GET",
pagination: true,
scrollOffset: 0,
rowList: [10, 20, 25],
sortname: "WorkOrderID",
scroll: 1,
sortorder: "desc",
multiselect: false,
viewrecords: true,
caption: header,
autowidth: true,
ignoreCase: true,
height: 580,
jsonReader: {
repeatItem: false,
root: function (obj) { return obj.d.rows; },
page: function (obj) { return obj.d.page; },
total: function (obj) { return obj.d.total; },
records: function (obj) { return obj.d.records; }
},
afterInsertRow: function(rowid, rowdata, rowelem) {
jQuery(GridName).setCell(rowid, 'WorkOrderID', '', '', { title: '', onclick: 'DisappearPopup(event);' });
jQuery(GridName).setCell(rowid, 'Requester', '', '', { title: '', onclick: 'DisappearPopup(event);' });
jQuery(GridName).setCell(rowid, 'AssignedTo', '', '', { title: '', onclick: 'DisappearPopup(event);' });
jQuery(GridName).setCell(rowid, 'SummaryText', '', '', { title: '', onclick: 'DisappearPopup(event);' });
jQuery(GridName).setCell(rowid, 'CreationDate', '', '', { title: '', onclick: 'DisappearPopup(event);' });
},
gridComplete: function() {
$('#dvMaintbl').css('visibility', 'visible');
$('#dvWait').css('display', 'none');
}
})
jQuery(GridName).jqGrid('navGrid', PagerName,
{
edit: false,
add: false,
del: false,
searchtext: 'Search',
refreshtext: 'Reload'
});
}
});
}
在.aspx页面
中添加此代码<script type="text/javascript">
// debugger;
jQuery(document).ready(function() {
FillGrid('Json.asmx/GetAllTroubleTickets', '#grid', '#pager', "put your column model here", "put your column names here", "put header text here");
});
</script>
以下是我的网络服务电话：
Public Function GetAllTroubleTickets() As String
Dim strStatus As String = HttpContext.Current.Request.QueryString("status")
Dim page As Integer = 1
If HttpContext.Current.Request.Form("page") IsNot Nothing Then
page = Integer.Parse(HttpContext.Current.Request.Form("page").ToString())
End If
Dim rp As Integer = 1
If HttpContext.Current.Request.Form("rowNum") IsNot Nothing Then
rp = Integer.Parse(HttpContext.Current.Request.Form("rowNum").ToString())
End If
Dim start As Integer = ((Page - 1) * rp)
If (strStatus = Nothing) Then
strStatus = "2"
End If
Dim dsDatos As DataSet = GetAllTroubleTicketsclass("", "WorkOrderID asc", "1", "4000", "", Convert.ToInt16(strStatus))
Dim result As String = Jayrock.Json.Conversion.JsonConvert.ExportToString(dsDatos.Tables(0).Rows)
Return result
End Function