How to insert new datagridview row in dataset and update in database?

See more:

C#

MySQL

DataGridView

Hi, all

I started programming in C#. I have problem: I created "Projects" table with 2 rows which are programmed in

get; set; 

class: ID, PROJECTS_NAME. I have already done with editing values in this table:

private void dataGridView4_CellEndEdit(object sender, DataGridViewCellEventArgs e)
       {
           string name_project = dataGridView4.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString();
           string id = dataGridView4.Rows[e.RowIndex].Cells[0].Value.ToString();

           MySqlConnection connection = new MySqlConnection("datasource = localhost; port = 3306; username = root; password = ");
           MySqlCommand cmd = new MySqlCommand("UPDATE projekt1.projects SET PROJECTS_NAME = @PROJECTS_NAME WHERE ID = @ID", connection);

           cmd.Parameters.Add("@ID", MySqlDbType.Int64).Value = int.Parse(id);
           cmd.Parameters.Add("@PROJECTS_NAME", MySqlDbType.VarChar).Value = name_project;

           try
           {
               connection.Open();
               cmd.ExecuteNonQuery();
               connection.Close();
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }
       }

SQL Columns in projects Table:

PROJECT_NAME VARCHAR
ID INT

And it works fine. But i have a problem with inserting new row and saving automatically in database.

What I have tried:

I've tried with RowValidated Event:

private void dataGridView4_RowValidated(object sender, DataGridViewCellEventArgs e)
     {
         string name_project = dataGridView4.Rows[e.RowIndex].Cells[1].Value.ToString();
         string id = dataGridView4.Rows[e.RowIndex].Cells[0].Value.ToString();

         MySqlConnection connection = new MySqlConnection("datasource = localhost; port = 3306; username = root; password = ");
         MySqlCommand cmd = new MySqlCommand("INSERT INTO projekt1.projects(PROJECT_NAME) VALUES(@NPROJECT_NAME);", connection);

         cmd.Parameters.Add("@ID", MySqlDbType.Int64).Value = int.Parse(id);
         cmd.Parameters.Add("@PROJECT_NAME", MySqlDbType.VarChar).Value = name_project;

         try
         {
             connection.Open();
             cmd.ExecuteNonQuery();
             connection.Close();

             MessageBox.Show("ok");
         }
         catch (Exception ex)
         {
             MessageBox.Show(ex.Message);
         }

         try
         {
             connection.Open();
             cmd.ExecuteNonQuery();
             connection.Close();
         }
         catch (Exception ex)
         {
             MessageBox.Show(ex.Message);
         }

But it didn't work because of

System.FormatException: "Invalid input string format."

Can someone please explain how to solve it? I've searched something but i don't know how to deal with. Greetings