private void borrowButton_Click(object sender, EventArgs e) { //DateTime BookDueDate; //string n = ""; int noOfDays = int.Parse(noOfDaysTextBox.Text); if (noOfDays == 0) { MessageBox.Show("You should Put The Valid Days For Borrow"); } //if (noOfDays==int.Parse("") ) //{ // MessageBox.Show("You should Put The Days For Borrow"); //} if (noOfDays <= 7) { DateTime currentDay = DateTime.Now; currentDay = currentDay.AddDays(noOfDays); dueBackTextBox.Text = currentDay.ToString("yyyy/MM/dd"); } else { MessageBox.Show("You can't borrow over 7 days"); } BookSelf bookself = new BookSelf(); bookself.UserId = userId; bookself.BookName = dgvShowBook.CurrentCell.Value.ToString(); bookself.BackDate = dueBackTextBox.Text; dataAccess.AddBookMySelf(bookself); MessageBox.Show("Borrow Successfully"); //switch (noOfDaysTextBox.Text) //{ // case "0": // BookLoan = 0; // DateTime today = DateTime.Now; // today = today.AddDays(BookLoan); // dueBackTextBox.Text = today.ToString("yyyy/MM/dd"); // break; // case "1": // BookLoan = 1; // DateTime today1 = DateTime.Now; // today1 = today1.AddDays(BookLoan); // dueBackTextBox.Text = today1.ToString("yyyy/MM/dd"); // break; // case "2": // BookLoan = 2; // DateTime today2 = DateTime.Now; // today2 = today2.AddDays(BookLoan); // dueBackTextBox.Text = today2.ToString("yyyy/MM/dd"); // break; // case "3": // BookLoan = 3; // DateTime today3 = DateTime.Now; // today3 = today3.AddDays(BookLoan); // dueBackTextBox.Text = today3.ToString("yyyy/MM/dd"); // break; // case "4": // BookLoan = 4; // DateTime today4 = DateTime.Now; // //TimeSpan duration4 = new TimeSpan(BookLoan, 0, 0, 0); // //DateTime answer4 = today4.Add(duration4); // today4 = today4.AddDays(BookLoan); // dueBackTextBox.Text = today4.ToString("yyyy/MM/dd"); // break; // case "5": // BookLoan = 5; // DateTime today5 = DateTime.Now; // today5 = today5.AddDays(BookLoan); // dueBackTextBox.Text = today5.ToString("yyyy/MM/dd"); // break; // case "6": // BookLoan = 6; // DateTime today6 = DateTime.Now; // today6 = today6.AddDays(BookLoan); // dueBackTextBox.Text = today6.ToString("yyyy/MM/dd"); // break; // case "7": // BookLoan = 7; // DateTime today7 = DateTime.Now; // today7 = today7.AddDays(BookLoan); // dueBackTextBox.Text = today7.ToString("yyyy/MM/dd"); // break; // default: // break; //} }