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I am trying to implement server side filtering for a Kendo UI grid (client only). I am not sure how to pass the filter operator and value entered on the filter box. I was able to implement server paging and want the filtering to work alongside the server paging, i.e. show page 2 of 5 items of filtered rows. I saw some example of binding the request to "DataSourceRequest" object but we do not have licence for the server side Kendo UI and have to achieve it using the client side changes only.
Here is my jQuery code:
var page = 1;
var pageSize = 5;
var title = "test";
var selectWork = function (e) {
alert("selected");
};
$("#selectWorkGrid").empty();
$("#selectWorkGrid").kendoGrid({
dataSource:
{
transport: {
read: {
url: "http://example.com/" + "work/SearchWorkJ?worktitle=" + title,
dataType: "json",
contentType: "application/json",
data: {
page: page,
pageSize: pageSize
}
},
serverFiltering: true,
parameterMap: function (data, type) {
if (type == "read") {
return {
page: data.page,
pageSize: data.pageSize
}
}
}
},
schema: {
model: {
id: "workId",
fields: {
workId: { type: "number" },
workTitle: { type: "string" },
writers: { type: "string" },
durationInMmSs: { type: "string" }
}
},
data: "data",
total: "total"
},
pageSize: pageSize,
serverPaging: true,
serverFiltering: true
},
sortable: true,
resizable: true,
columnMenu: false,
filterable: {
mode: "row",
extra: false,
operators: {
string: {
startswith: "Starts with",
eq: "Is equal to",
neq: "Is not equal to"
}
}
},
noRecords: {
template: "No results available."
},
pageable: {
numeric: false,
refresh: true,
buttonCount: 15
},
scrollable: false,
columns: [
{
field: "workTitle",
title: "Title",
template: "#=workTitle#"
},
{
field: "writers",
title: "Writers",
filterable: false,
template: "${writers == null ? '':writers}",
width: 300
},
{
field: "durationInMmSs",
title: "Duration",
filterable: false,
headerAttributes: { style: "text-align:right;" },
attributes: { style: "text-align:right;" },
width: 80
},
{ command: { text: "Select", click: selectWork }, title: "", width: 60 }
]
});
Controller action returning json:
public ContentResult SearchWorkJ(string workTitle, int page = 0, int pageSize = 0)
{
var worksJson = "";
var works = WorkService.SearchWork(workTitle, page, pageSize);
if (works != null)
{
// Set total to upto current record + 1 so that next button works in kendo
int totalCount = page * pageSize + 1;
var sortedWorks = new List<WorkViewModel>();
sortedWorks.AddRange(works.Select(w => new WorkViewModel
{
WorkId = w.WorkId,
WorkTitle = w.WorkTitle,
Writers = w.Writers,
DurationInMmSs = w.Duration
}).OrderBy(w => w.WorkTitle));
worksJson = JsonConvert.SerializeObject(new { total = totalCount, data = sortedWorks });
}
return new ContentResult { Content = worksJson, ContentType = "application/json" };
}
If you look at this
https://dojo.telerik.com/EhUNUwOr
<div id="my-grid"></div>
<script>
$('#my-grid').kendoGrid({
dataSource: {
serverFiltering: true,
serverSorting: true,
serverPaging: true,
pageSize: 5,
transport: {
read: function(options) {
$.ajax({
url: '/yourapi',
contentType: 'application/json',
dataType: 'json',
type: 'POST',
data: JSON.stringify(options.data),
success: function(result) {
options.success(result);
}
})
}
},
schema: {
id: 'Id',
data: 'Data',
total: 'Total',
errors: 'Errors',
fields: [
{ field: 'Id', type: 'number' },
{ field: 'FirstName', type: 'string' },
{ field: 'LastName', type: 'string' }
]
},
filter: {
filters: [{ field: 'FirstName', operator: 'eq', value: 'David' }]
}
},
});
</script>
This will send
{"take":5,"skip":0,"page":1,"pageSize":5,"filter":{"filters":[{"field":"FirstName","operator":"eq","value":"David"}]}}
to your server / api
now if you have a model that shares this structure you can respond in the following format
{
"Data" : <your array of models>,
"Total" : the number of models that fits your filter regardless of the filter, this helps kendo grid knowing how many pages there is for the pager.,
"Errors" : is mostely used for create and update so just return null
}
From here its a bonus to the answer above.
I noticed you are using CSharp so you have two options to apply create dynamic queries from Queryable.
use a library I open sourced
https://github.com/PoweredSoft/DynamicLinq
which is available on Nuget https://www.nuget.org/packages/PoweredSoft.DynamicLinq/
There is an example you can look at on git hub.
You'll have to adapt the code around but it should get you started.
https://github.com/PoweredSoft/DynamicLinq#how-it-can-be-used-in-a-web-api
[HttpGet][Route("FindClients")]
public IHttpActionResult FindClients(string filterField = null, string filterValue = null,
string sortProperty = "Id", int? page = null, int pageSize = 50)
{
var ctx = new MyDbContext();
var query = ctx.Clients.AsQueryable();
if (!string.IsNullOrEmpty(filterField) && !string.IsNullOrEmpty(filterValue))
query = query.Query(t => t.Contains(filterField, filterValue)).OrderBy(sortProperty);
// count.
var clientCount = query.Count();
int? pages = null;
if (page.HasValue && pageSize > 0)
{
if (clientCount == 0)
pages = 0;
else
pages = clientCount / pageSize + (clientCount % pageSize != 0 ? 1 : 0);
}
if (page.HasValue)
query = query.Skip((page.Value-1) * pageSize).Take(pageSize);
var clients = query.ToList();
return Ok(new
{
total = clientCount,
pages = pages,
data = clients
});
}
An alternative is using
https://weblogs.asp.net/scottgu/dynamic-linq-part-1-using-the-linq-dynamic-query-library
I am trying to implement Kendo UI Grid with an Kendo Upload inside the grid. While I am using ASP.NET MVC I am not using the Telerik MVC Wrappers. I am attempting to do this without them.
The problem that I am having is that IEnumerable HttpPostedFileBase is null when it posts back to my Action method.
JavaScript:
$(document).ready(function () {
var dsGalleryItemFile = new kendo.data.DataSource({
transport: {
read: "#Url.Content("~/Intranet/GalleryItemFile/ListFiles/")#Model.galleryItemID",
update: {
url: "#Url.Content("~/Intranet/GalleryItemFile/UpdateFile")",
type: "POST"
},
destroy: {
url: "#Url.Content("~/Intranet/GalleryItemFile/DeleteFile")",
type: "POST"
},
create: {
url: "#Url.Content("~/Intranet/GalleryItemFile/CreateFile/")#Model.galleryItemID",
type: "POST"
}
},
// determines if changes will be send to the server individually or as batch
batch: false,
schema: {
model: {
id: "fileID",
fields: {
fileID: {
editable: false,
nullable: true
},
filename: {},
fileType: { defaultValue: {fileTypeID: 1, fileType: "Web JPEG"} },
fileType: {},
width: { type: "number" },
height: { type: "number" },
}
}
}
});
$("#gvGalleryItemFile").kendoGrid({
columns: [{
field: "filename",
title: "Filename"
}, {
field: "filepath",
title: "File Upload",
editor: fileUploadEditor//,
//template: "<img src='#=filepath.filepath#' />"
}, {
field: "fileType",
title: "File Type",
editor: fileTypeDropDownEditor,
template: "#=fileType.fileType#",
}, {
field: "width",
title: "Width"
}, {
field: "height",
title: "Height"
}, {
command: ["edit", "destroy"]
}],
editable: { mode: "inline" },
toolbar: ["create"],
dataSource: dsGalleryItemFile
});
});
function fileTypeDropDownEditor(container, options) {
$('<input required data-text-field="fileType" data-value-field="fileTypeID" data-bind="value:' + options.field + '"/>')
.appendTo(container)
.kendoDropDownList({
autoBind: false,
dataSource: {
transport: {
read: "#Url.Content("~/Intranet/FileType/ListFileTypes")"
}
}
});
}
function fileUploadEditor(container, options) {
$('<input type="file" name="fileUpload" id="fileUpload" />')
.appendTo(container)
.kendoUpload({
async: {
saveUrl: "#Url.Content("~/Intranet/GalleryItemFile/UploadFile")"
},
complete: onUploadComplete
});
}
MVC Action:
[HttpPost]
public ActionResult UploadFile(IEnumerable<HttpPostedFileBase> uploadedFiles)
{
if (uploadedFiles != null)
{
foreach (var thisFile in uploadedFiles)
{
string newFileName = Path.GetFileName(thisFile.FileName).Replace(" ", "");
var physicalPath = Path.Combine(Server.MapPath("~/Areas/Gallery/Content/GalleryImages"), newFileName);
thisFile.SaveAs(physicalPath);
}
return Content("");
}
else
{
return Content("Error");
}
}
Try to name the argument parameter in the action method signature the same way as the name attribute of the input that you turn into upload widget.
In your case
public ActionResult UploadFile(IEnumerable<HttpPostedFileBase> fileUpload)
I want to export all data in my jqxgrid into json and send it to another page via AJAX.
My problem is when I click export button, the data in the grid and data before export was not the same. It change float number to Interger. Here is my code:
Javascript:
$('#export_bt').on('click', function(){
var row = $("#jqxgrid").jqxGrid('exportdata', 'json');
$('#debug').html(row);
console.log(row);
});
var tableDatas = [
{"timestamp":"06:00:00","A":99.49,"B":337.77,"C":155.98},
{"timestamp":"07:00:00","A":455.67,"B":474.1,"C":751.68},
{"timestamp":"08:00:00","A":1071.02,"B":598.14,"C":890.47}
];
var tableDatafields = [
{"name":"timestamp","type":"string"},
{"name":"A","type":"number"},
{"name":"B","type":"number"},
{"name":"C","type":"number"}
];
var tableColumns = [
{"text":"Times","datafield":"timestamp","editable":"false","align":"center","cellsalign":"center","width":150},
{"text":"A","datafield":"A","editable":"false","align":"center"},
{"text":"B","datafield":"B","editable":"false","align":"center"},
{"text":"C","datafield":"C","editable":"false","align":"center"}
];
function setTableData(table_data,table_column,table_datafields)
{
sourceTable.localdata = table_data;
sourceTable.datafields = table_datafields;
dataAdapterTable = new $.jqx.dataAdapter(sourceTable);
$("#jqxgrid").jqxGrid({columns:table_column});
$("#jqxgrid").jqxGrid('updatebounddata');
$('#jqxgrid').jqxGrid('sortby', 'timestamp', 'asc');
$("#jqxgrid").jqxGrid('autoresizecolumns');
for(var i=0;i<table_column.length;i++){
$('#jqxgrid').jqxGrid('setcolumnproperty',table_column[i].datafield,'cellsrenderer',cellsrenderer);
}
}
var cellsrenderer = function (row, columnfield, value, defaulthtml, columnproperties) {
if (value||value===0) {
return value;
}
else {
return '-';
}
};
var sourceTable ={ localdata: '', datatype: 'array'};
var dataAdapterTable = new $.jqx.dataAdapter(sourceTable);
dataAdapterTable.dataBind();
$("#jqxgrid").jqxGrid({
width: '500',
autoheight:true,
source: dataAdapterTable,
sortable: true,
columnsresize: false,
selectionmode: 'none',
columns: [{ text: '', datafield: 'timestamp', width:'100%' , editable: false, align:'center'}]
});
setTableData(tableDatas,tableColumns,tableDatafields);
Html:
<div id="jqxgrid"></div>
<button id="export_bt">Export</button>
<div id="debug"></div>
http://jsfiddle.net/jedipalm/jHE7k/1/
You can add the data type in your source object as below.
datafields: [{ "name": "timestamp", "type": "number" }]
And also I suggest you to apply cellsformat in your column definition.
{ text: 'timestamp', datafield: 'timestamp', cellsalign: 'right', cellsformat: 'd' }
The possible formats can be seen here.
Hope that helps
You can export data in very fast way just like it is id jqxGrid with
var rows = $("#jqxGrid").jqxGrid("getrows");
It will be json array.
i have a newbie question, but i’m scratching my head on this one. I have a grid, bound to a dataadapter. On the grid, paging and filtering is explicit disabled, but the GET-call from the dataadapter allways includes following parameters in the GET-url:
?filterscount=0&groupscount=0&pagenum=0&pagesize=10&recordstartindex=0&recordendindex=18&_=1386768031615
I want to get all data, then cache it clientside for paging and filtering, but in the first step i just want to get my data bound to the grid.
Here’s my code:
var source = {
type: "GET",
datatype: "json",
datafields: [
{ name: 'url' },
{ name: 'category', type: 'int' },
{ name: 'info' },
{ name: 'status', type: 'bool' }
],
url: '/api/redirects/Getallredirects',
id: 'id'
};
var dataAdapter = new $.jqx.dataAdapter(source, {
contentType: 'application/json; charset=utf-8',
loadError: function (xhr, status, error) {
alert(error);
},
downloadComplete: function (data) {
var returnData = {};
returnData.records = data.d;
return returnData;
}
});
$("#jqxgrid").jqxGrid({
source: dataAdapter,
filterable: false,
pageable: false,
virtualmode: false,
columns: [
{ text: 'URL', dataField: 'url', width: 100 },
{ text: 'Category', dataField: 'category', width: 100 },
{ text: 'Info', dataField: 'info', width: 180 },
{ text: 'Status', dataField: 'status', width: 80, cellsalign: 'right' },
]
});
I don’t get any data, the GET-call fails because of the automatically included parameters. How do i get rid of these parameters?
I just found in the jqxGrid documentation a reference to these parameters, but no example, how to remove them:
http://www.jqwidgets.com/jquery-widgets-documentation/documentation/jqxgrid/jquery-grid-extra-http-variables.htm
Thanks in advance for any help.
The below will remove the default parameters:
var dataAdapter = new $.jqx.dataAdapter(source,
{
formatData: function (data) {
return {};
}
}
);
I am facing this problem for quite a while now with the problem that I am unable to bind JSON data that my controller action is passing to the kendo UI Grid, there were few JavaScript issues before but now they are gone but still my grid is not showing any results:
In Model:
public object GetResult(string id)
{
var sqlCom = new SqlCommand("SELECT [No],[Desc],[Date],[Height],[Final] FROM [cr_form] WHERE [uId]=#id;", sqlConn);
sqlCom.Parameters.AddWithValue("#id", id);
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);
JsonWriter jsonWriter = new JsonTextWriter(sw);
var rcrds = GETSQLRESULTS(sqlCom);
try
{
int i = 0;
if (rcrds != null || rcrds.HasRows)
{
//jsonWriter.WriteStartObject();
while (rcrds.Read())
{
jsonWriter.WriteStartObject(); //Changed
for (int j = 0; j < rcrds.FieldCount; j++)
{
jsonWriter.WritePropertyName(rcrds.GetName(j)); // column name
jsonWriter.WriteValue(rcrds.GetValue(j)); // value in column
}
i++;
jsonWriter.WriteEndObject(); //Changed
}
//jsonWriter.WriteEndObject();
}
}
catch (Exception ex) { }
return jsonWriter;
}
In Controller:
public ActionResult GetRecords()
{
var usrObj = new User();
var jsnRslt = usrObj.GetResult(Session["Id"].ToString());
//Till here jsnRslt contains this string: “{"No":null,"Desc":"asfasfasfasfasfasfasfasfasfasfasfasf","Date":"2013-03-27T00:00:00","Height":0,"Final":null,"No":null,"Desc":"etwetwetwetwet","Date":"2013-03-27T00:00:00","Height":0,"Final":0,"No":null,"Desc":"asfasfasfskfjklajsfkjasklfjklasjfklajsfkljaklsfjklasjfkljasfkljlasf","Date":"2013-03-27T00:00:00","Height":0,"Final":0,"No":null,"Desc":"askjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfklaskjfkajsfkl","Date":"2013-03-27T00:00:00","Height":0,"Final":0,"No":null,"Desc":"safasfasfasfasfasf","Date":"2013-03-27T00:00:00","Height":0,"Final":0,"No":null,"Desc":"asfasf","Date":"2013-03-27T00:00:00","Height":0,"Final":0,"No":null,"Desc":"asfasfasf","Date":"2013-03-27T00:00:00","Height":2,"Final":0}”
//After Changes in the Model I am getting it in the required Array format:
//{"No":null,"Desc":"asfasfasfasfasfasfasfasfasfasfasfasf","Date":"2013-03-27T00:00:00","Height":0,"Final":null}
//{"No":null,"Desc":"etwetwetwetwet","Date":"2013-03-27T00:00:00","Height":0,"Final":0}
//{"No":null,"Des...
return Json(jsnRslt, JsonRequestBehavior.AllowGet);
}
In View:
<div>
<script type="text/javascript">
$(document).ready(function () {
$("#grid").kendoGrid({
dataSource: {
type: "json",
serverPaging: true,
pageSize: 5,
groupable: true,
selectable: "row",
transport: { read: { url: "Records", dataType: "json"} }
},
height: 400,
scrollable: true,
sortable: true,
filterable: true,
pageable: true,
columns: [
{ field: "No", title: " No" },
{ field: "Desc", title: "Description" },
{ field: "Date", title: "Date" },
{ field: "Height", title: "Height" },
{ field: "Final", title: "Final" }
],
dataBound: function () {
this.expandRow(this.tbody.find("tr.k-master-row").first());
}
});
});
</script>
</div>
But after all this all I can see is an empty grid. And no errors in JavaScript console.
Please help
The JSON that you return from the server should be array. You currently it seems that you are returning single objects with multiple fields that are the same.
Here is an example how the JSON should look like:
[{"No":null,"Desc":"asfasfasfasfasfasfasfasfasfasfasfasf","Date":"2013-03-27T00:00:00","Height":0,"Final":null},
{"No":null,"Desc":"etwetwetwetwet","Date":"2013-03-27T00:00:00","Height":0,"Final":0},
{"No":null,"Desc":"asfasfasfskfjklajsfkjasklfjklasjfklajsfkljaklsfjklasjfkljasfkljlasf","Date":"2013-03-27T00:00:00","Height":0,"Final":0}]
I think following code will be useful for you and let me know if you have any problem:
$('#gridName').kendoGrid({
dataSource: {
type: "odata",
transport: {
read: {
contentType: "application/json; charset=utf-8",
type: "POST",
url: 'YourURL'
}
},
pageSize: 10,
type: "json"
},
scrollable: true,
sortable: true,
resizable: true
});
Inside you dataSource set data.
data: #Html.Raw(Json.Encode(Model.RemoteObject)),
RemoteObject is you object containing all data.
First I check your tranport read URL. have you trace the controller if it fires the GetRecords command?
transport:
{
read: {
//if you don't use area then remove it
url: "#Url.Action("GetRecords", new { area = "YourAreaName", controller = "YourControllerName" })",
dataType: "json"
}
}
if it still doesn't fix your problem, then modify your Controller,
public ActionResult GetRecords([DataSourceRequest] DataSourceRequest request)
{
var usrObj = new User();
var jsnRslt = usrObj.GetResult(Session["Id"].ToString());
return Json(jsnRslt.ToDataSourceResult(request), JsonRequestBehavior.AllowGet);
}
here's the link to understand the Kendo's ToDataSourceResult