When scroll inside RadGrid in Chrome on a mobile device or in the DevTools responsive/mobile mode, the browser throws [Intervention] Unable to preventDefault inside passive event listener due to target being treated as passive. See  https://www.chromestatus.com/features/5093566007214080. I get 1 error message for every pixel the grid scrolls. 

The problem is due to jQuery and is reproducible with 1.12.4 and 3.3.1 versions of it.

Vertical Column Headers using rgRotateHeader seem to be a different, less readable, font than the regular horizontal column headers.  Please see attachment.  All those column headers are set to the same font.  To my eye, the rotated headers look quite poor.

We used Telerik in our application. The network team reported a spam in it.

Using Telerik grid with SortExpression in telerik:GridTemplateColumn, has been reported as high priority network issue.

Issue name : Ajax request header manipulation (DOM-based)

Recorded the issue in below snippet of responce.

onclick="Telerik.Web.UI.Grid.Sort()"
 
Please let me know if you have any suggestions.!!!

The following steps create this issue:
1. Use html 4
2. Use telerik AJAX (For consistency)
3. Set a radgrid with some columns that reach beyond the extent of its element (such that it requires horizontal scrolling). Use at least four columns. One being the GridClientSelectColumn.
4. Have the following settings:
Control Settings: 
AllowPaging=true,AllowSorting=true,AllowFiltering=true,AllowFilteringByColumn=true,AllowMultiRowSelection=true

Control Events Used: NeedDataSource,OnItemDataBound
Client Settings:
EnablePostBackOnRowClick=false,Resizing AllowColumnResize=true, Selecting AllowRowSelect=true,UseClientSelectColumnOnly=false,Scrolling,AutoGenerateColumns=false,AllowScroll=true,UseStaticHeaders=true

Important note: Retain data on the server, rebind, and, on item databound, select the previously selected rows.

Set up a button to perform some action on the selected rows and have this action use AJAX such that this action depends on the currently selected rows in the RadGrid.

5. Scroll away from the selection checkboxes
6. Select some rows in your RadGrid
7. Perform your action with AJAX
If all was set up correctly, your grid should have been rebound with the previously selected rows re-selected. The RadGrid should still be scrolled to its previous position.
8. Perform your action with AJAX again. Here's the bug, the grid states that it has no selected items; however, the client shows that there are items selected in the UI.

This may be related to "RadGrid's last selected item index is not persisted correctly when two or more postbacks are triggered from external controls."

It is possible to have "{4} | Page {0} of {1}, items {2} to {3} of {5}" (all 6 parameters) for PagerTextFormat, but not just "items {2} to {3} of {5}".

I want column width state maintain on postback. here with i am attaching may aspx page

We are using version 2012.Q3 of Telerik, for the RadGrid control.

Once we updated to VS 2013 Update 2, we experienced a rendering problem on our development machines for all RadGrids on our site.

Upon further review we found out that this was due to the Browser Link feature in VS 2013. Browser Link appears to inject code between the development environment and the web server(s).

We were able to fix this upon finding an article pointing us towards the Browser Link feature. However it did take quite a while to figure out the issue, so we wanted to pass this along so that you could create a Knowledge Base article about this so that others can find the solution more easily and quickly.

Resolution:
Add the following item to the AppSettings section of the Web.config
<add key="vs:EnableBrowserLink" value="false" />

References:
http://weblogs.asp.net/imranbaloch/archive/2013/10/23/messy-html-and-js-errors-when-you-install-visual-studio-2013.aspx

http://stackoverflow.com/questions/19513631/radgrid-rendering-differently-in-different-machine-of-100-same-application-when

http://www.asp.net/visual-studio/overview/2013/using-browser-link 
(what is Browser Link)

My Sort order of records is persisting in normal radgrid but when i am using radgrid with grouping its not persisting.

The ragGrid during page load are as folllows.

Customer group Name        Customer Name      Sort Order
Group 1
                                              Very High                    1
                                                High                          2
                                               ABC                           3

and the filer for columns format are as follow

<telerik:GridBoundColumn HeaderText="Customer Name" FilterControlAltText="Filter column1 column"
                                    DataField="Name" UniqueName="Name" FilterControlWidth="150px" AutoPostBackOnFilter="true"
                                    HtmlEncode="true" CurrentFilterFunction="Contains" ShowFilterIcon="false">
                                </telerik:GridBoundColumn>

And when i filter the grid on customer name with "high" word the grid shows results as follow

Customer group Name        Customer Name      Sort Order
Group 1
                                                  High                        2
                                              Very  High                   1
                                               
And i am needdatasource event then also this problem occurring so please provide me any solution.

To reproduce the issue enable RowSelect and RowsDragDrop ClientSettings, and attach OnRowDropping  event listener

<ClientSettings AllowRowsDragDrop="true">
    <Selecting AllowRowSelect="true" />
    <ClientEvents OnRowDropping="function() {alert('RowDrooping event fired!');}"/>
</ClientSettings>

When Grouping on an Integer value, the groups are not ordering correctly. i.e. if you group on values {864, 1455, 1494}, the actual order comes out as {1455, 1494, 864}.

Ordering on the same data, but converted to a string and padded to the left with zeros resolves this issue.

Hello Sir

As I was workimg on Print functionality of RadGrid data.

While working on this functionality I found issue of "Print Preview" in chrome. Its working fine in IE and Firefox but in Chrome blank screen is coming with Print Preview Failed.

While searching on it I found "RadGrid Not Printing in Chrome" Post on telerik developer forum, I have created Telerik account and also reply to this post. 

Sir can you please help me regarding this issue. I look forward to hearing from you.

Regards

In the following scenario it is not working.
1.	Grid populated with data.
2.	Filter applied on one of the columns in the grid. As a result data filtered correctly in the grid.
3.	For e.g 2nd column is moved to 5th column as vice versa.
4.	Again Filter applied on one of the columns in the grid.
5.	Grid data is not filtering as expected and column reorder that we did in point (3) is rolled back. (i.e., 5th column moved to 2nd column, vice versa)


Please help us in fixing this issue.

Reference: http://www.telerik.com/forums/radgrid-column-header-and-data-item-alignment-problem

This has apparently been an issue with RadGrid for a long time, according to the above thread. I have done a significant amount of testing to isolate this bug and have attached a self-contained solution in VB.NET 4.0 (VS 2010).

I removed all the surplus RadGrid properties I could in order to simplify the debugging process on your end and included my notes in the code and on the test page. There is indeed some peculiar behavior with the control.

Regards,
Matthew

Bind RadGrid client-side to a WCF Data Service, using a separate GetCount method. Then filter on column typing the value 12345 in the filter textbox. The result is that the value is not passed correctly to the web service.

with client-side databinding when setting sort/filter expressions on button click and then calling the rebind or set_currentPageIndex methods the control makes multiple requests to the web service.