There are situations where SelectedRows won't return the number of rows preselected when using Begin/EndUpdate even though it seems like there's a row selected in the UI. By preselected I mean the row that looks selected after the rows has been added. This bug has caused some problems for us because the user tried some action on a row they thought was preselected and it would fail.

One situation I found where this bug can be reproducted is by using SortOrder in combination of Begin/EndUpdate. There are probably more situations but I hope this one will let you find the underlying bug.

The attached project contains a simple form with a RadGridView which will contain a list of persons. The list is populated by this method:

public void PopulateGridView(List<Person> persons)
{
	PersonGridView.BeginUpdate();
	PersonGridView.DataSource = persons;
	PersonGridView.EndUpdate();
	PersonGridView.Columns[nameof(Person.LastName)].SortOrder = RadSortOrder.Ascending;
}

There are two buttons: "Step one" and "Step two". The first will mimick a situation where the user search a database for persons and none will be found. By clicking the "Get selected rows" you will see that the SelectedRows will return zero rows which is correct.
But when you afterwards click "Step two" (which will add five rows) it seems like there's one row preselected. I would expect the SelectedRows to return that row but by clicking "Get selected rows" again you will see that the returned rows are zero still. The CurrentRow, however is set to the preselected row as expected.
If you start by clicking "Step two" the SelectedRows actually returns the correct rows. Quite strange :-)

I know this is a very small issue and can be avoided. But as I mentioned there are other situations where this problem occurs and it's quite hard to figure out exactly what causes it.

Thank you for your help.

Best regards
Ulrik Skovenborg

Please run the attached sample project. The row's height in the print document is not adjusted according to the column's width in the print page. 

Workaround: 

Please use the attached sample project.

Hi There,

This call is only a nice to have, it is not critical at all. It is just a slight annoyance when building the Grid's columns - especially when there are many columns to adjust. My workflow is usually as follow. 

Add all the columns needed, then after that I will run through all the columns and want to set the widths. But my speed is broken because I can't tab between the 3 width properties: Width, Min Width, Max Width. I have to click to put focus the the next value.

If possible, please can you correct the tab indexes?

Thank you

Kind Regards

Ben

PS. You may close this ticket immediately - this is only a request.

1. Filter the column "code" to show only "(Blanks)"
2. Hit the "Save Layout" button to save the layout into a string
3. Hit the "Load Layout" button. The row is gone
   

Use the following code snippet:

https://docs.telerik.com/devtools/winforms/styling-and-appearance/using-a-default-theme-for-the-entire-application#enabledisable-the-globally-set-theme-for-a-specific-control 

            ThemeResolutionService.ApplicationThemeName = "MaterialPink";
            radGridView1.ElementTree.EnableApplicationThemeName = false;
            radGridView1.ThemeName = "FluentDark";

Workaround:

        private void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
        {
            RadDropDownListEditor ddlEditor = e.ActiveEditor as  RadDropDownListEditor;
            if (ddlEditor != null)
            {
                RadDropDownListEditorElement el = ddlEditor.EditorElement as RadDropDownListEditorElement;
                el.Popup.ElementTree.EnableApplicationThemeName = false;
                el.Popup.ThemeName = this.radGridView1.ThemeName;
            }
        }

1. Using a RadGriditem
2. Set AllowSearchRow to false as default
3. Add a RadButton or something else to toggle AllowSearchRow
4. Toggling works as long the "x" in the search mask is not used

When the "x" is used it seems that AllowSearchRow is not set to false because the toggle button has then to be pressed twice to show up the search mask again.

Please refer to the attached sample project and follow the steps from the grid file:

Steps to reproduce:
1. Filter the checkbox column to only show unchecked rows
2. Enter "5" for filtering the Name column
3. Click the checkbox column on the bottom row
4. Remove filter value in the Name column
This will result in the unrelated record showing as checked. Scrolling or changing sorting may refresh the cell. If the  filter is cleared by using the No filter menu option, the problem is not observed

Please refer to the attached sample project and follow the steps in the gif file.

Workaround: custom filtering to control which rows to be visible or not: https://docs.telerik.com/devtools/winforms/controls/gridview/filtering/custom-filtering 

        private void radGridView1_CustomFiltering(object sender, GridViewCustomFilteringEventArgs e)
        {
            e.Handled = true;
            e.Visible =  e.Row.Cells["Value"].Value.Equals( Double.NaN);
        }

You can also note it in demo application with this settings:

Hi,

I want to extend the RadGridView control, so I do "public class TkGrid : Telerik.WinControls.UI.RadGridView {}"

How do I apply a theme to TkGrid control ? I set "ThemeResolutionService.ApplicationThemeName = "FluentDark" but this doesn't work.

I attached a small project where I have one TkGrid and one RadGridView. On top of form there is a dropdown from where you can change the theme

When I do this, TkGrid is not displayed with the new theme (this works for RadGridView)

p.s. I also added a custom Button, TkButton inherited from RadButton. When I change the theme, the look of TkButton is changed, so this is ok

Dear Support team,

Our Application issue: While running application in assistive mode and having a grid with large number of columns, Narrator/JAWS starts reading each Column Value as "DbNull"
while User is Tabbing through selected Row. (Please see attach Video for better understanding.)

I also created a sample Program:

1. Build Win Form app having a RadGridView. [Sample Attached in 1514161]
2. Start Win 10 Narrator App

3. Run App from Step #1 [Note: Please do not Resize Main Form yet]
4. Start Tabbing from Grid selected Row. Narrator does not read/speak Cell Values.

5. Now Close & Run Application again and Maximize Window. Repeat Step #4. Narrator reads/speak Cell Values as expected.

It seems reads all values fine until they are visible, and once you continue tabbing and horizontal scrolling happens and then stops reading.

Please advice.  A Fix for it would be a great help!

Looking forward to hear back!

Thanks and Regards,

Vivek
Sr. .Net Developer

Hi,

I want to add a MultiComboBoxColumn to a GridView

is it possible to define the columns for this MultiComboBox at design time (in Property Builder editor of Grid) ?