Question

I have a database with MySQL which is connected with C# windows application.
My problem is that I have a form with 2 buttons and datagridview. The one button is exit and the other is clear.
With the button clear I want to clear all the data in the database and I can’t do this.
The only thing I have done is to clear the entries and then when I reopen the entities are there!

THE CODE IS:

private void button3_Click(object sender, EventArgs e)
{ //clear balance
    projectpizzaDataSet ds = new projectpizzaDataSet();
    projectpizzaDataSetTableAdapters.balanceTableAdapter daCust = new projectpizzaDataSetTableAdapters.balanceTableAdapter();

    for (int i = 0; i < dataGridView1.Rows.Count; i++)
    {
        dataGridView1.Rows.RemoveAt(i); //delete error 
    }
}

Answer 1

Thank you all but the solution is:

private void button3_Click(object sender, EventArgs e) {
    //clear balance
    projectpizzaDataSet ds = new projectpizzaDataSet();
    projectpizzaDataSetTableAdapters.balanceTableAdapter daCust = new projectpizzaDataSetTableAdapters.balanceTableAdapter();

    while (dataGridView1.Rows.Count > 0 {
        dataGridView1.Rows.RemoveAt(0);
    }

    this.balanceTableAdapter.Update(projectpizzaDataSet.balance);
}