Copy Row change one cell

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Hi.
I have a little problem.
I have a form with 2 datagridviews. I select rows to copy over to the new grid.

Here comes the problem. I also have a datetimepicker. In grid1 I have a column with a date. But when I past the copied files I like it to change that date to datetimepickers.

C#

try
{
    foreach (DataGridViewRow row in dataGridView1.SelectedRows)
    {      ((DataTable)dataGridView2.DataSource).ImportRow(((DataRowView)row.DataBoundItem).Row);
    }
    foreach (DataGridViewRow row in dataGridView2.Rows)
    {
        row.Cells[2].Value = dtp_Datum.Value.ToString();
    }
}

This code change every row. If I copy 2 rows and then change date, all rows in grid 2 get the latest changed date.

Posted 26-Apr-15 22:05pm

thaagaard elofsson

Updated 26-Apr-15 22:32pm

Tomas Takac

v2

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Staffan Bruun · Accepted Answer · 2015-04-26T22:47:00

You need to only modify the added rows. Unfortunately, ImportRow does not return the newly created row, but according to the manual all new rows are added to the end of the datatable, so you can access them by index:

C#

int numberOfRowsToCopy = dataGridView1.SelectedRows.Count;
int numberOfExistingRows = dataGridView2.Rows.Count;

foreach(DataGridViewRow row in dataGridView1.SelectedRows)
{
    ((DataTable)dataGridView2.DataSource).ImportRow(((DataRowView) row.DataBoundItem).Row);
}

for(int i = 0; i < numberOfRowsToCopy; ++i)
{
    dataGridView2.Rows[numberOfExistingRows + i].Cells[2].Value = dtp_Datum.Value.ToString();
}