How to refresh DataGridView after inserting data into database?

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C#

ASP.NET4

Hi all, I am developing a windows application.In that one form contains multiple datagridivew which displays the table content from mysql table. In form i have button which links to another windows form and their i am inserting values to the table. After inserting when i click on Save button, it should save in the table and also updates in the datagridview.

If i call the display() method after inserting values to the table, it is displaying N number of times.

public void display()
        {
            try
            {
                connection = new MySqlConnection(connection_string);
                connection.Open();
                
                //Code to Display Customer Details in Home Page
                dataAdapter_Customer=new MySqlDataAdapter(string.Format("select cusname,balance, contact, phone1,email from new_customer where busname=?p1"),connection);
                dataAdapter_Customer.SelectCommand.Parameters.AddWithValue("?p1", busnamevar);
                commandBuilder_Customer=new MySqlCommandBuilder(dataAdapter_Customer);
                dataTable_Customer.Locale=System.Globalization.CultureInfo.InvariantCulture;
                dataAdapter_Customer.Fill(dataTable_Customer);
                bindingSource=new BindingSource();
                bindingSource.DataSource=dataTable_Customer;
                dataGridView1.DataSource=bindingSource;
               

                //Code to Display Supplier Details in Home Page
                dataAdapter_Supplier = new MySqlDataAdapter(string.Format("select suppliername,total_balance,contact,phone1,email from new_supplier where businessname=?p1"), connection);
                dataAdapter_Supplier.SelectCommand.Parameters.AddWithValue("?p1", busnamevar);
                commandBuilder_Supplier = new MySqlCommandBuilder(dataAdapter_Supplier);
                dataTable_Customer.Locale = System.Globalization.CultureInfo.InvariantCulture;
                dataAdapter_Supplier.Fill(dataTable_Supplier);
                bindingSource1 = new BindingSource();
                bindingSource1.DataSource = dataTable_Supplier;
                dataGridView3.DataSource = bindingSource1;
                                
                connection.Close();              
            }

            catch(MySqlException ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

If the table contains 4 rows, when i call display() method, it is showing 8 rows, like that it is increasing when ever i click on refresh button.

I think i have to clean after displaying the contents.