private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e) { UpdateDeleteStudentForm a = new UpdateDeleteStudentForm(); SqlConnection sql = new SqlConnection("Data Source=.\\SQLEXPRESS;Initial Catalog=ObisProjem;Integrated Security=True"); //sql bağlantısı kuruluyor sql.Open(); SqlDataAdapter da = new SqlDataAdapter("SELECT *FROM Student_Table", sql);//database e veriler çekiliyor. DataTable dataTable = new DataTable(); da.Fill(dataTable); sql.Close(); switch (e.ColumnIndex) { case 0: a.id.Select(); break; case 2: a.textLName.Select(); break; case 3: a.dateBrithTime.Select(); break; case 5: a.phoneText.Select(); break; case 6: a.addressText.Select(); break; } a.id.Text = dataTable.Rows[e.RowIndex][0].ToString(); a.button2_Click(sender, e); a.ShowDialog(); }