Current RadGrid (Q3 2015) does supports model binding of master/detail records.

Request the functionality to set ItemType on the detail gridview and pass the master's datakey as the id for the detail select method.

Or, alternatively, if the model has a virtual IQuerable binding, set the detail view's datasource to the models virtual entity

For example, a model with a one to many relationship to the color options for a car:
Model Cars()
{ string name
int colorRange
virtual colorOptionsModel colorOptions
}
Model colorOptionsModel
{
int colorRange
 string colorName;
} 

In the RadGrid:
<mastertable DataKeyName = "colorRange">
<DetailView datasource="Item.colorOptions">

Applies to all model-bound controls; Tree-list, etc..

Current data-annotation support includes validation.

Please include handling of the following attributes
- Display Name defaults for databound columns
- Text boxes and labels width based on max-length
- Display attributes
- auto-generation of drop-downs for enum datatypes and foreign keys
- readonly based on editable attribute

The GridCheckBoxColumn cannot handle null values in a bit field. 

I would like to be able to bind the checkboxcolumn to a bit field that allows nulls. The checkbox should be checked when the value is true, unchecked when it is false, and filled when it is null.

The current solution is to use the RadButton inside a GridTemplateColumn and add custom togglestates, but this solution is not documented and it is very time intensive for something that should be quick and simple. It requires a lot of coding to update or insert a record.

Because linq to entities no support DateTime.Parse() , So can you DateTime.Parse() to DateTime method

http://www.telerik.com/forums/how-override-filter-pattern-from-radgrid

RadGrid 508 compliance request for hierarchical grid.

RF-5

Complex Tables are Missing ID or Headers Attributes

Data tables have multiple logical levels of row or column headers and lack the necessary coding associating the data cells with their respective headers. This issue is a violation of 1194.22(h) in Section 508 and 1.3.1 in WCAG 2.0.

Add id= and headers= attributes to all cells to correctly associate data cells with their respective row and column headers. For further assistance see http://www.hhs.gov/web/policies/webstandards/htmltable.html  and http://webaim.org/techniques/tables/data.

When using RadGrid GridDropDownColumn that displays referenced data from a different table allow filter to be replaced with a dropdown of available values. For example if my database has a table called Groups with and Id field and Name field; and it also contains a Members table with a GroupId field which contains the Id from the Groups table when I configure the Members GroupId Field with GridDropDownColumn with ListTextField="Name" ListValueField="Id" DataField="GroupId" as the values for the dropdown I should be able to choose FilterType="DropDownControl" to get the functionality found here http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/filtering/filter-templates/defaultcs.aspx for City and Country columns.

Need the ability to Sort Grouped Items (ex. Salesperson) by the value of another Grouped Item (Sum of Sales).

Currently, there is NO WAY to sort a list of Salespeople by Total Sales. You can only perform an alpha sort on Salesperson's Name.

So, if you have a list of 100 Salespeople and their total product sales across dimensions like (product, geographic) you will have to MANUALLY look through and note who are your top Salespeople !!!!!!!!!!!

How can this be acceptable ??

An alpha sort on Salesperson is the best you guys can do??

I would like to get a visual indiation on the grouppanel of the RadGrid for column which are not allowed to group on.

Forum reference:
http://www.telerik.com/forums/grouppanel-drop-indicator-style-of-not-groupable-columns#yjnsALhKekGuqD_Ze0Kmqw

We recently added row group functionality to our grids and we and our users are very happy with this.

Only thing that bothers us is the drop functionality on the grouppanel. We have an wish to make the drop functionality of the grouppanel much more intuitive. Especially when the RadGrid is already grouped on multiple columns.

Possiblity to drag a new, not grouped yet, column to the grouppanel to the position/order where you want the grouping of the grid to come up with. E.g. drag the next column between the first and the second grouping column. It is not possible to add it at a specific location.
 

 this case can be reproduced on the RadGrid Grouping demo on your site:
 http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/grouping/grouping/defaultcs.aspx

Forum reference: 
http://www.telerik.com/forums/grouppanel-column-drop-and-reorder#GEEn16H44Uia4_U3_o143g

We recently added row group functionality to our grids and we and our users are very happy with this.

Only thing that bothers us is the drop functionality on the grouppanel. We have an wish to make the drop functionality of the grouppanel much more intuitive. Especially when the RadGrid is already grouped on multiple columns.

The marker to indicate where the user will drop an existing grouping column is shown at the begin and the end of the group column connector between groups. Except in front of the first group column. Can the same behavior be added to the end of the last grouped column?

 This case can be reproduced on the RadGrid Grouping demo on your site:
 http://demos.telerik.com/aspnet-ajax/grid/examples/functionality/grouping/grouping/defaultcs.aspx

Please could you add an option to the NextPrevNumericAndAdvanced pager mode to allow the Page Size RadTextBox to be displayed as a RadComboBox like the NextPrevAndNumeric pager.
This would help us to have a more consistant look and feel between the 2 pager modes.

It would be nice to have a "remove" button on the edit template, where the user could delete an image that was uploaded and saved on the database before. 

Please add a setting for the Grid in batch edit mode to enable prompting to save changes.  The prompt should occur when navigating away from the page, when paging, when filtering, when refreshing, or any other action that would cause loss of changes without a save.
For details on how I implemented this manually, please see ticket 933229.

Time independent filtering (EqualTo problem) is currently not supported with client-side binding in RadGrid, using a WCF with odata  binding.
When i use the filter in a date column, the filter does not return records, it is because is passing date AND TIME to the OData service. 
I have open a support ticket #932463, but Daniel says it is a new feature and not a bug.
So i request it.

I grouped my grid on two levels.
Second level still contains many records.
It would be nice to allow paging on second level

User friendly Grid filtering...
I developed a custom feature where I display the filter expression used in a grid. This is very helpful so that users do not have to guess or remember what exactly they filtered on. And it provides a single click to clear all the filters at once. Before, all they saw was that certain columns are being filtered by, but they don't see what the filters actually are (EqualTo, Not EqualTo, StartsWith,,,etc) and they had to clear one filter at a time to get rid of all filtering.
There is not much to it but it's subject to break if Telerik makes changes to the their filtering mechanism (which did happen). It would be nice if this feature can be standard so it will be part of Q.A after any changes to the Grid.
Attached is a working sample page to see this in action. See comments in code.

Hello,

RadGrid that has a master and detail tables and is rebinded to another data-source. Please automatically change all information and details of the RadGrid, including details-view. Currently,  only the master table is rebinded, not the details.

Please see an example of the problem in the my forum question:
 http://www.telerik.com/forums/radgrid-detailtable-doesn-t-rebind!

Thanks,
Daniel.
.NET Programmer at
ISR Corp