Delete all rows from datagridview and database

Question

Hi guys as the title says i want to delete all rows from a datagridview and in the process deleting them from the database. Heres my code but its only deleting one row and not all. Thank you

     private void clear_Click(object sender, EventArgs e)
    {

        if (this.dgvProducts.SelectedRows.Count > 0)
        {
            foreach (DataGridViewRow row in dgvProducts.SelectedRows)
            {
                int selectedIndex = dgvProducts.SelectedRows[0].Index;
                int rowID = int.Parse(dgvProducts[0, selectedIndex].Value.ToString());
                 crud.AddRecord("Delete from Supplier_productlist where ProductID = '" + rowID + "' and SupplierID = '"+supplierid.Text+"' ");

            }
        }

        //dgvProducts.Refresh();

    }

Answer 1

It seems that in the foreach loop, only 0th item was processed.

If you want to specify index, I would suggest for loop instead of foreach.

If you want to use foreach, then you probably should work on "row" itself instead of keep working on 0th item:

dgvProducts.SelectedRows[0]
dgvProducts[0, selectedIndex]

Answer 2

In your code, you're looping over only SelectedRows , not all Rows .

foreach (DataGridViewRow row in dgvProducts.SelectedRows)

To loop over the whole datagrid's rows you should use

foreach (DataGridViewRow row in dgvProducts.**Rows**)

Hope, this link helps: https://msdn.microsoft.com/ru-ru/library/system.windows.forms.datagridview.rows(v=vs.110).aspx