How to delete row from datagridview and update database?

[ajinkya ragalwa]

Hey guys,

I have written a code that could delete selected row in data grid view. I gives lots of errors.

Let me paste my code.

for (int i = 0; i < dataGridView1.Rows.Count; i++)
                    {
 
                        DataGridViewRow dr = dataGridView1.Rows[i];
                        if (dr.Selected == true)
                        {
                            dataGridView1.Rows.RemoveAt(i);
 
 
                            cmd.CommandText = "Delete from transact1 where C_ID ='" + i + "'";
                            cmd.ExecuteNonQuery();
 
                            da.Update(ds, "transact1");
                            MessageBox.Show("Deleted");
                        }
 
                        con1.Close();
                    }

While deleting row it throws exception.
"Connection property not initialized"

I have tried opening connection in different ways but it didn't help either. So can anyone tell me what can possibly wrong with this code?

Thanks
Ajinkya

[Leito]

What code do you use to open the connection to the database?

If your database is hosted on an SQL server, you should use something like this:

String strConnection = "Data Source=SQLSERVERNAME; Initial Catalog=DATABASENAME; User Id=USERNAME; Password=USERPASSWORD;Connection Timeout=30;"
SqlConnection cn = new SqlConnection(strConnection);
cn.Open();