It's kind of difficult to describe in the subject, but here's the scenario. In an ASP.NET Core 3.1 web app, we have some different Kendo Grids that are generated by using the HTML Helper. Some of these use server operations while others do not. Following the information in the Persist State demo, I'm working on changes to save the grid options (sorting, filtering, page number, etc.) when the user navigates away from a page, then restore them the next time it's loaded. With a grid we have using server operations, this is working well so far. For a grid we have using client operations, on the other hand, I'm getting unexpected results.
Example:
@(Html.Kendo().Grid(new[]
{
new { ProductName = "Product 1", UnitPrice = 3.50 },
new { ProductName = "Product 2", UnitPrice = 5.30 }
})
.Name("TestGrid")
.NoRecords(n => n.Template("No records found"))
.Columns(columns =>
{
columns.Bound(p => p.ProductName);
columns.Bound(p => p.UnitPrice);
})
.DataSource(dataSource => dataSource
.Ajax()
.PageSize(20)
.ServerOperation(false)
)
)
<script>
$(document).ready(function () {
var grid = $("#TestGrid").data("kendoGrid");
var options = grid.getOptions();
grid.setOptions(options);
});
</script>
If you comment out the JavaScript, you get a working grid. With the JavaScript in place, this should get the options from the grid, then immediately re-apply those same options (just for testing purposes) and the grid should end up looking the same as it did before. However, the setOptions() call seems to be triggering a POST back to the same page (with the data "sort=&group=&filter=") then wiping the data from the grid and showing the "No records found" message. However, since this grid is bound to a model property and has ServerOperation(false), all of the data needed is already at the client and there is no Ajax request that exists to get this data.
This is the code from viewing the source that was rendered by the code in the View from above:
<div id="TestGrid" name="TestGrid"></div><script>kendo.syncReady(function(){jQuery("#TestGrid").kendoGrid({"noRecords":{"template":"No records found"},"columns":[{"title":"Product Name","field":"ProductName","filterable":{"messages":{"selectedItemsFormat":"{0} selected items"},"checkAll":false},"encoded":true},{"title":"Unit Price","field":"UnitPrice","filterable":{"messages":{"selectedItemsFormat":"{0} selected items"},"checkAll":false},"encoded":true}],"scrollable":false,"dataSource":{"type":(function(){if(kendo.data.transports['aspnetmvc-ajax']){return 'aspnetmvc-ajax';} else{throw new Error('The kendo.aspnetmvc.min.js script is not included.');}})(),"transport":{"read":{"url":""},"prefix":""},"pageSize":20,"page":1,"groupPaging":false,"total":2,"schema":{"data":"Data","total":"Total","errors":"Errors","model":{"fields":{"ProductName":{"editable":false,"type":"string"},"UnitPrice":{"editable":false,"type":"number"}}}},"data":{"Data":[{"ProductName":"Product 1","UnitPrice":3.5},{"ProductName":"Product 2","UnitPrice":5.3}],"Total":2}}});});</script>
<script>
$(document).ready(function () {
var grid = $("#TestGrid").data("kendoGrid");
var options = grid.getOptions();
grid.setOptions(options);
});
</script>
I'm not sure why it's attempting an Ajax request, but that appears to be what's causing the problems. With the other grid we have that *does* use server operations, I'm assuming we're not having this same problem because it does actually require an Ajax request to read the data.
Trouble on iPad 6/7/8 with Safari.
Using grid with batch and incell edit mode.
Datepicker is not working. It just shows the text box to manually type in date.
Every once in a while the date picker pops up and stays for selection.
Sometimes I see the dat picker, but it goes away suddenly before being able to set a date.
I want to be able to expand / collapse grouped column headers in my grid (ASP.NET Core). I have found this example which achieves what I need (https://docs.telerik.com/kendo-ui/knowledge-base/grid-expand-collapse-columns-group-button-click), however the HeaderTemplate() method appears to be unavailable. See my placement below.
I am using the following packages:
KendoUIProfessional, Version="2020.3.915"
Telerik.UI.for.AspNet.Core, Version="2020.3.915"
@(Html.Kendo().Grid<RegulationViewModel> () .Name("grid") .Columns(columns => { columns.Select().Width(75).Locked(true); columns.Group(g => g .Title("Key information") .HeaderTemplate("Key info <button class='k-button' style='float: right;' onclick='onExpColClick(this)'><span class='k-icon k-i-minus'></span></button>") .Columns(i => { i.ForeignKey(p => p.ContinentId, (System.Collections.IEnumerable) ViewData["continents"], "Id", "ContinentName") .Width(110).Locked(true); i.ForeignKey(p => p.AreaId, (System.Collections.IEnumerable) ViewData["areas"], "Id", "AreaName") .Width(150).Title("Area").Locked(true); }) ); columns.ForeignKey(p => p.CountryStateProvinceId, (System.Collections.IEnumerable)ViewData["countries"], "Id", "CountryStateProvinceName") .Width(150).Locked(true); columns.Command(command => command.Destroy()).Width(100); }) .ToolBar(toolbar => { toolbar.Create(); toolbar.Save(); toolbar.Custom().Text("Mark reviewed").Name("review"); }) .Editable(editable => editable.Mode(GridEditMode.InCell)) .PersistSelection() .Navigatable() .Resizable(r => r.Columns(true)) .Reorderable(r => r.Columns(true)) .Sortable() .Filterable(f => f .Extra(false) .Messages(m => m.Info("Show items with:")) .Operators(operators => operators .ForString(str => str .Clear() .Contains("Contains")) ) ) .Scrollable(sc => sc.Virtual(true)) .Events(e => e .Edit("forceDropDown") .DataBound("onDataBound") .FilterMenuInit("filterMenuInit") ) .DataSource(dataSource => dataSource .Ajax() .Batch(true) .PageSize(20) .ServerOperation(false) .Model(model => { model.Id(p => p.Id); model.Field(p => p.Id).Editable(false); model.Field(p => p.ContinentId).DefaultValue((ViewData["defaultContinent"] as ContinentViewModel).Id); model.Field(p => p.AreaId).DefaultValue((ViewData["defaultArea"] as AreaViewModel).Id); model.Field(p => p.CountryStateProvinceId).DefaultValue((ViewData["defaultCountry"] as CountryStateProvinceViewModel).Id); }) .Read(read => read.Action("GetRegulations", "RegulationIndex").Type(HttpVerbs.Get)) .Create(create => create.Action("AddRegulations", "RegulationIndex").Type(HttpVerbs.Post)) .Update(update => update.Action("UpdateRegulations", "RegulationIndex").Type(HttpVerbs.Post)) .Destroy(delete => delete.Action("DeleteRegulations", "RegulationIndex").Type(HttpVerbs.Delete)) ))
Bug Report
Ticket ID:1486632
When using groupable.sort.compare with client operations and groupPaging, a JavaScript error is thrown:
Reproduction
Environment
2020.3.915
Enhancement
Add support for setting ClientHeaderTemplate as a function in Html Helper Grid
Current behavior
ClientHeaderTemplate can be set only as a string
Expected/desired behavior
ClientHeaderTemplate shall allow executing a function
Environment
Kendo UI version: all
Browser: all
Bug report
The Kendo UI Grid's pager for UI for ASP.NET Core does not have an "All" option and it can't be configured in the Razor syntax.
Current behavior
Using the Kendo UI Grid's pageable.PageSizes, the ALL option is not available for UI for ASP.NET Core as it's only an Int32[].
Expected/desired behavior
The All option should be included like in the UI for ASP.NET MVC Razor Syntax.
Environment
- Kendo UI version: 2020.3.915
- Browser: all
Per the documentation for the Grid's Search Panel:
"When the server operations are enabled, you can search only by using string fields."
This is an oddly-specific limitation to have that causes an awkward user experience. Grids in some areas with limited data might use client operations and, as a result, the Search Panel is capable of searching all columns in a Grid. Other areas, however, might have grids with significantly more data and be using server operations for performance reasons. A side-effect of this would mean the Search Panel is incapable of filtering on non-string fields. This not only might lead to unexpected results to an end-user, but also requires the developer to explicitly list each string field that can be searched. If a developer forgets to list only string fields, the default action will be for it to attempt to filter on all fields. If any fields happen to not be strings, you still get a loading indicator as if it's attempting to filter, but the Ajax request silently fails and returns an error 500 behind the scenes.
There are some manual workarounds discussed here, as well as some information as to why this limitation exists. It seems like the problems causing these limitations are known, as are some rough workarounds to get around it. It would be great if we could get some official support to address this limitation so developers aren't left to either work around it on their own or avoid using this feature altogether. This feature would be great if it weren't for this limitation. A single place to quickly and easily type in something to filter on, and have that filter applied against all columns could definitely save some time and be very useful, but with this limitation with a pretty technical explanation (from an end-user perspective), the unexpected mixed results could instead lead to confusion and frustration, and distrust of this feature.
Bug report
Grid's items are not correctly calculated when a group is expanded and groupPaging is set to "true".
Reproduction of the problem
- Open this Dojo and run it
- Expand the "Assistant Sales Agent" group.
- Expand the "Assistant Sales Representative" group
Current behavior
On the expand of the "Assistant Sales Agent" group, the footer displays the following:
On the expand of the "Assistant Sales Representative" group, the footer displays:
The number of the displayed items is incorrectly calculated
Expected/desired behavior
The number of the displayed items should be calculated based on the number of the rows inside the opened groups
Environment
- Kendo UI version: 2020.2.617
- jQuery version: x.y
- Browser: [all]
Hello,
i guess i've found some bug in the Version 2020.2.617.
I have upgraded from 2020.1.406 to 2020.2.617
after them it is not in the correct way possible for me to hidde or display the correct columns.
If i click the first or second column nothing happend..
after them i get the wrong fields to hidde or display.. if i use the old js files from your CDN
it works again, but i'm not sure what will not be working in our WebApp if i do so.
/Tino
Hi Team,
I'd like to request adding a configuration to the Kendo UI Grid or ExcelExport event which would be a setting to autofit the Excel sheet columns instead of changing the workbook.sheets.columns.autowidth.
Thank you!
When a hierarchy grid id contains a dot, the grid fails to generate its detail template.
The dot(and other legal HTML identifier characters) should be escaped internally by Kendo, so that they can be selected by jQuery and the grid initialized.
Here is a sample Dojo to illustrate:
Hi Team ,
I Am trying to export kendo grid content from Server side as i need to do some modification(View model) before exporting to excel. and also i need to add some custom headers while exporting.
Can you please provide me the solution with example with this scenario.
Thanks,
Narasegowda
Bug Report:
Whenever the foreign key column of the grid is configured for multi checkbox filtering and is nullable, the value of the "null" option is sent to the server as "NaN".
Steps to replicate:
1. Set ForeignKey column
2. Make the column nullable
3. Set the filterable.multi option to true
4. filter by the null value
A sample project with reproduction has been shared in Ticket with ID: 1463089
Kendo UI has the property https://docs.telerik.com/kendo-ui/api/javascript/ui/grid/configuration/scrollable that can not be set in the UI for ASP.NET Core with the value TRUE
The reason I am asking is because if I change it on document ready using the grid.setOptions if the grid has autobind then the Read method is executed twice.
Hi guys,
I found out, that the QueryableExtension always generates a ToLower for strings filtered with the equals operator. The ToLower is applied by the FilterOperatorExtensions in this method:
private static Expression GenerateEqual(
Expression left,
Expression right,
bool liftMemberAccess)
{
if (left.Type == typeof (string))
{
left = FilterOperatorExtensions.GenerateToLowerCall(left, liftMemberAccess);
right = FilterOperatorExtensions.GenerateToLowerCall(right, liftMemberAccess);
}
return (Expression) Expression.Equal(left, right);
}It would be nice, if the to lower is controllable with a parameter. At the moment it generates a to lower in the sql query, which generates a lot of overhead in some situations with large tables.
At the moment I remove all "equal to" filter and apply it manually to the IQueryable object.
Best regards
Moritz
### Bug report
### Reproduction of the problem
On the mobile version on Android 10, the Grid does not enter incell editing.
Dojo to reproduce: https://dojo.telerik.com/oDUBuKAt
### Environment
* **Kendo UI version:** 2020.1.219
* **Browser:** Android 10 Web Browser
At current when working with the french culture, the year in the date will default be represented with 2Y (dd/MM/yy)
This potentially creates a problem for dates>2030, a date like 01/01/30 would be save as 1930 instead of 2030.
When looking at other culture such nl-BE, en-GB, 4 digits are always used for the year.
I propose to change this also for the french culture so that dd/MM/yyyy would become the standard format.
PS: You can download the culture file and change it, but you'd experience a problem with the popup editor in combination with a display template... in this case the local culture file will be ignored and 2 digits would still be used for the date
Bug report
When the data source of the grid is set to WebAPI, the Batch option is not available.
Reproduction of the problem
1. Set the DataSource to WebAPI()
2. Attempt to enable the Batch(true) option.
Description
Reproducible only with the latest version of the suite - 2019.3.1023. The Batch option is available in the 2019.3.917 version.
Environment
* **Kendo UI version:** 2019.3.1023
* **jQuery version:** 1.12.4
* **Browser:** [all]