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How to filter and show only selected items in datagridview?

I have a datagridview and recently I got task to add a checkbox column (which I did) and a button (btnFilter) that will filter/show only selected rows so for example if I check only 4th, 5th and 6th row and click on 'btnFilter' the datagridview would show only rows 4,5 and 6.
So, the problem is how to show only selected (checkbox) rows.
Thank you for your time.

The idea is to have a button which when clicked, a loop will be executed over GridView Rows. Within the loop we will check whether the CheckBox for that row is checked, if the CheckBox is checked then the Value from the GridView Row Cell and Cell controls like Label, TextBox, DropDownList, etc. can be fetched.
Here is the complete example with screenshots and source code in C# and VB
GridView checkbox: Get Selected rows

Adding a checkbox to a databound DataGridView

I'm working with DataGridView in C#. I fill it with a table from database using BindingSource. After filling the DataGridView I need to add a row of checkboxes that should be first in the table, to enable data filtering in future.
I mean: for example after clicking "Load" button I get DataGridView filled with 4 columns of data and the first row should consists of checkboxes.
I confused. I use
DataGridViewCheckBoxCell checkCell = new DataGridViewCheckBoxCell();
SourceDGV.Rows.Add(checkCell);
I mean here:
But after clicking load button it says You can't add rows to databounded DataGridView
Sorry if ecxeption translated wrong, I translated it from Ukrainian.
Any help appreciated.

Am afraid, there is no concept of whole rows to be of some type(checkbox in your case) in DataGridView. It is other way around. You can have whole column to be of checkbox type. You'd use DataGridViewCheckBoxColumn for that.
Showing checkboxes in whole row even makes no sense for me: Assume you have data bounded Person object to the DataGridView. So there will be columns like Name, Age, Address. Now, on what basis you show checkbox in the row? How can a Name be converted to a bool(which is what checkbox needs as a value)?
One workaround I can think of would be, handle custom painting, If First row paint checkboxes over there and manually handle their click events. But am pretty sure it's not gonna be easy.

Selecting next row(a whole row, not cell) in datagridview after row deletion

I have a problem with deletion of rows from datagridview. I want the next row to be selected fully after the previous one was deleted, so I can delete multiple rows in a row by pressing "Delete" button. The problem is that after row deletion, I get the first cell of the next row selected, so when I press "Delete" I just erase the content of that cell and I have to click of the row header to be able to remove in with "Delete" button click.
Any ideas/help about how the about can be fixed will be highly appreciated.
Thanks a lot.
Regards,
Igor
UPDATE:SelectionMode is already set to FullRowSelect mode. I forgot to mention that I have textboxes embedded into the grid cells, and when I delete a row, the textbox in the first cell of the next row gets selected and therefore I can't delete this row by pressing Delete button: I need to select the whole row again by pressing the row header.

What if you change the SelectionMode to "FullRowSelect" in DataGridView properties?

Set the SelectionMode property of the DataGridView either from the Properties window or from the code like this,
dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
This should solve your issue.

how to delete a row from gridview, not from database

I have a GridView with columns "Item Code, Name, Quantity, Rate". I bind the values for this columns from textboxes, not from database. It means I am adding values to GridView at runtime. Then in button click or in rowdeleting event, I want to delete selected row from GridView at runtime. Would you please provide solution for this? Thanks in advance...

Prevent scrolling to selected row in datagridview when a new row is added

I noticed that the Datagridview automatically scrolls to a row that the user selected when a record is added above the selected row. When the record is added below the selected row it does not jump to the selected row.
I would like to prevent it from jumping to the selected row when the record is placed above it. What can I do to get to behavior?

I also came across the same issue some time ago. I couldn't find a way to prevent that but set the focus to the previouly selected row by keeping that index in memory.

DataGridView.ClearSelection();