Rendering Issue with RadGrid Grouping

[Vamsi Kamal]

Hi Telerik Team,

I am facing two problems using RadGrid Grouping.
1. The RadGrid is not rendering properly when it is loaded for the first time. (Please find the screenshot.)
2. If I Drag and Drop any column to GroupPanel then it is showing below error.
     Error Message : "Expression cannot be null or empty"


I can see both the above issues only when the RadGrid is loaded for the first time.
If I do any action like ungroup the initail grouped column/ Changed the paging/ Refresh/ Sort then it is rendering properly and then onwards it is working fine as expected.

Could you please suggest me a solution for this.?
Many Thanks,
Vamsikamal

[Eyup]

Hello Vamsi,

I suggest that we continue our conversation on the following thread to enable other users with similar issues to track more easily the discussion:
http://www.telerik.com/community/forums/aspnet-ajax/grid/grouping---drag-drop-radgrid-columns-to-panel-div-which-is-not-a-part-of-radgrid.aspx

All the best,
Eyup
the Telerik team

[Vamsi Kamal]

I have a requirement for RadGrid like below. Can anyone suggest me the best way to do it.

- Need to provide check boxes column headers
- If we select one of the check box, then that column should be invisible. And the column name should be added to a dropdown list, which is on top of the RadGrid. All the selected column names should be added to drop down list.
- If I select the drop down list and click on a button then all the selected columns should be visible.

- Need to achieve this without posting back the page.

Thanks in advance.

[Eyup]

Hello Vamsi,

I believe you are looking for a functionality resembling the Columns section of the Header Context Menu:
http://demos.telerik.com/aspnet-ajax/grid/examples/generalfeatures/headercontextmenu/defaultcs.aspx

You could use the client side events of the ComboBox to hide and show the selected column.

I hope this will prove helpful.

Greetings,
Eyup
the Telerik team

[Vamsi Kamal]

I don't want to group the columns. I want to place check boxes in the column headers, if I select one of the check box, then that column should be Invisible.

[Eyup]

Hello Vamsi,

In the provided demo you can see that the Columns section of the Header context menu hides and shows the columns as requested.

Nevertheless, I have created a sample RadGrid web site where I implemented the desired functionality. Please check out the attached application and let me know about the result.

Kind regards,
Eyup
the Telerik team

[Vamsi Kamal]

Thank you very much..
This is what I am looking for... :)