C＃删除数据表中的行

Question

I delete rows in a DataTable with this code:

if (x == "y" || x == "yes")           
{             
    dt.Rows.RemoveAt(id);  
}

How I can save changes (delete row) in MS Access? I have code like this, but this doest not work

OleDbCommand delCmd = new OleDbCommand("DELETE FROM PERSONA WHERE ID=?",con1);
delCmd.Parameters.Add(new OleDbParameter("@ID",OleDbType.Integer, @ID));

foreach (DataRow dro in dt.GetChanges().Rows)           
{
   if (dro.RowState == DataRowState.Deleted)                                                   
   {    
      con1.Open();    
      delCmd.ExecuteNonQuery();    
      con1.Close();
   }    
}

Answer 1

You're not specifying the correct ID. You need to add the parameter to the command within your loop.

Answer 2

Delete the rows using the Delete method. This will mark the rows to be deleted when using Update on a table adapter. You are just removing rows from the collection; not from the database.