row header text

I am new with Telerik components and bring my apologies for my (probably) stupid question.

I want to write a number of row in row header column. Can you explain:

1. How can I find row number from RowFormattingEventArgs in RowFormatting event?

2. How can I renumber all rows in case of some row was inserted/deleted?

3. How can I prevent painting an image of pen (on row header cell) during editing some element in row?

Example:
1 A
2 B
3 A

Results as

1 A
3 A

2 B

instead of

1 A
2 A

1 B

Could you please let us know whether the comboboxes should be always visible, or should be visible only when the user enters the edit mode of RadGridView? Generally speaking the desired scenario is not supported out of the box, but the API of RadGridView may allow us to achieve something similar to what you require. In addition, describe how the values of these three comboboxes should be saved in a single cell. These details will allow us to discuss the case further.

A bit off topic, I would kindly ask you to open a new thread for each question that is not related to the main topic of an existing thread. This will allow the others interested in the same questions to find the answers more easily.

I suppose that the 2nd and the 3rd comboboxes are not opening, because they do not contain any data.
Please find attached a sample project which follows your scenario, but as you can see there, all comboboxes can be opened and they all contain data. You can follow my approach to get three combos at the same time in just one cell. You can also take a look at this article which covers the topic of creating a custom editor.

More information regarding row formatting, can be found here: http://www.telerik.com/help/winforms/gridview-rows-formatting-rows.html.

Let us know if you have any other questions.

hi dess

thank you for your answer

but i`ve a problem in this situation

when ever i have multi paging ,row index is reset per page 

please help me 

Hello, Aseman,  

RadGridView exposes two collections that contain data rows:
- Rows - contains all data rows that belong to RadGridView. Data operations such as grouping, sorting, filtering, etc. do not change the content of the collection or the order in which the row objects exist in the collection.
- ChildRows - returns the data rows that are currently represented by RadGridView in the order in which they appear. The collection is modified every time a data operation (grouping, sorting, filtering) occurs.

Similar to filtering, sorting and grouping, the ChildRows collection is affected by the paging as well and it contains only the records on the current page. A common scenario is to access the real row index when the paging is enabled in the order the items appear in the grid.

The RadGridView.MasterTemplate.DataView.Indexer offers the Items collection which contains all the rows in the order in which they appear in the grid. The collection is affected every time a data operation like grouping, sorting, filtering occurs. You can use it to extract the correct index when moving through the pages:

        private void radGridView1_ViewCellFormatting(object sender, Telerik.WinControls.UI.CellFormattingEventArgs e)
        {
            if (e.CellElement is GridRowHeaderCellElement && e.Row is GridViewDataRowInfo)
            {
                GridDataView dataView = this.radGridView1.MasterTemplate.DataView as GridDataView;
                e.CellElement.Text = (dataView.Indexer.Items.IndexOf(e.Row) + 1).ToString();
                e.CellElement.TextImageRelation = TextImageRelation.ImageBeforeText;
            }
            else
            {
                e.CellElement.ResetValue(LightVisualElement.TextImageRelationProperty, ValueResetFlags.Local);
            }
        }

I hope this information helps. If you need any further assistance please don't hesitate to contact me.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

Hello, Robert,

The RadGridView.MasterTemplate.DataView.Indexer offers the Items collection which contains all the rows in the order in which they appear in the grid. The collection is affected every time a data operation like grouping, sorting, filtering occurs. The Indexer can not be accessed by index as you suggested.

If you want to access the rows after grouping you should use the ChildRows collections. The collection is modified every time a data operation (grouping, sorting, filtering) occurs. More information and examples are available here: https://docs.telerik.com/devtools/winforms/controls/gridview/rows/rows-vs-childrows

I hope this helps. Let me know if you need further assistance.

Regards,
Nadya
Progress Telerik