private void btn_secilenleri_oku_Click(object sender, EventArgs e)
        {
            DataSet   ds = new DataSet();
            DataTable dt = new DataTable();

            for (int i = 0; i < listBox1.Items.Count; i++)
            {
                ExcelBaglanOku.ExcelYol = listBox1.Items[i].ToString();
                dt = ExcelBaglanOku.ExcelOku();
                ds.Tables.Add(dt);
            }

            DataTable dtAll = ds.Tables[0].Copy();

            for (var i = 1; i < ds.Tables.Count; i++)
            {
                dtAll.Merge(ds.Tables[i]);
            }
            dataGridView1.AutoGenerateColumns = true;
            dataGridView1.DataSource          = dtAll;
        }
 private void btn_oku_Click(object sender, EventArgs e)
 {
     dataGridView1.DataSource = ExcelBaglanOku.ExcelOku();
 }
 private void btn_sec_Click(object sender, EventArgs e)
 {
     txt_excel_yolu.Text = ExcelBaglanOku.ExcelYoluSec();
 }