DataGridViewCheckBoxColumn dg = new DataGridViewCheckBoxColumn();

            dg.HeaderText = "选择";

            dg.Width = ;

            dataGridView1.Columns.Add(dg);

 DataTable dt = new DataTable();

            dt.Columns.Add("文件名");

            foreach (string str in lstr)

            {

                DataRow dr = dt.NewRow();

                dr[] = str;

                dt.Rows.Add(dr);

            }

            DataGridViewButtonColumn button = new DataGridViewButtonColumn();

            button.HeaderText = "操作";

            button.Text = "单独导出";

            button.UseColumnTextForButtonValue = true;

            dataGridView1.DataSource = dt;

            dataGridView1.Columns.Add(button);

            dataGridView1.Columns["文件名"].Width = ;