Datagridview updating by form son

I have a main form ( form1 ) where I load a datagridviwer and I need to do the following: I have a second form ( form2 ) that excludes the selected line in datagridviwer ( form1 ), only I need to do that when I delete the line from datagridviwer with the button on form2 , it closes the screen of form2 and returns to the screen of form1 already updated, ie with the line deleted, how can I do that?

Here is my code that updates datagridviwer ;

{
    conm.Open();
    adap = new SqlDataAdapter(@"select 
                                        sa.Cod_Solicitacao,
                                        cli.Cliente,
                                        cli.Contato,
                                        sa.Solicitante,
                                        sa.Representante,
                                        sa.Area_Atuacao,
                                        sa.Tipo_Envio,
                                        sa.Separador,
                                        convert(varchar(10), cast(Data_Entrega as date), 103) as Finalizado,
                                        cli.Id_Cliente,
                                        sa.Id_Solicitacao
                                from tbl_SolicitacaoAmostra as sa
                                inner join tbl_Cliente as cli with(nolock) on cli.Id_Cliente = sa.Id_Cliente
                                inner join tbl_Produto as pro with(nolock) on pro.Id_Solicitacao = sa.Id_Solicitacao
                                where sa.Deletado is null and cli.Deletado is null and pro.Deletado is null
                                group by sa.Cod_Solicitacao, cli.Cliente, cli.Contato, sa.Solicitante, sa.Representante, sa.Separador, sa.Area_Atuacao, sa.Tipo_Envio, sa.Separador, sa.Data_Entrega, cli.Id_Cliente, sa.Id_Solicitacao", conm);
    ds = new DataSet();
    adap.Fill(ds, "Solicitacao");
    DGW_solictacao.DataSource = ds.Tables[0];
    conm.Close();
}
MessageBox.Show("Solicitação excluida com sucesso!!!");
this.Dispose();