Error when adding new row to DataGridView

Question

I have a DataGridView with some text columns, combo box columns and an image column. When I try to add a blank new row by calling DataGridView1.Rows.AddCopy(0) I get the following error: System.FormatException: Formatted value of the cell has a wrong type.

The new row does not contain any data. When the user adds a new row through the GUI (i.e. not programmatically) there is no problem. Does anyone have any ideas as to what might be causing this issue?

How can someone add a row and not have it be programmatically? This is a program, it has to be added via code. Do you mean not with your code? I believe your problem is there is nothing to copy, try Rows.Insert(1,0) instead. — Hogan
– Hogan, Commented Jan 25, 2013 at 19:00
I mean not within my code. The user can add the new row through DataGridView's internal code. — Lukas Bystricky
– Lukas Bystricky, Commented Jan 25, 2013 at 19:02
@Haxx: no I'm not using databindings. @plast1K: I'm not giving it a type either, my understanding is that the new row should be already a DataGridViewRow. — Lukas Bystricky
– Lukas Bystricky, Commented Jan 25, 2013 at 19:06

bas · Accepted Answer · 2013-01-25 19:11:54Z

3

Does this help?

        // Create a new row on a datagridview
        var rowId = dataGridView1.Rows.Add();

        // fill the cells in the newly created row with your data
        dataGridView1.Rows[rowId].Cells[ColumnText.Name].Value = "";
        dataGridView1.Rows[rowId].Cells[ColumnCheckbox.Name].Value = true;
        dataGridView1.Rows[rowId].Cells[ColumnImage.Name].Value = null; // add image

answered Jan 25, 2013 at 19:11

bas

15.2k23 gold badges88 silver badges173 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Lukas Bystricky Over a year ago

Yes, thanks that works really well. I figured AddCopy would do that automatically. I'm not sure what the difference is between Add and AddCopy.

Hogan Over a year ago

@HH - With AddCopy() you have to have something to copy, as I said in my example... Insert would also work.

Collectives™ on Stack Overflow

Error when adding new row to DataGridView

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related