private void OpenSpisokClick(object sender, EventArgs e)
{
if (need_updated == true)
{
DialogResult result = WantSaveList();
if (result == DialogResult.Yes)
{
SaveSpisokClick(sender, e);
}
else if (result == DialogResult.Cancel)
{
return;
}
}
dlg_open.InitialDirectory = Directory.GetCurrentDirectory();
if (dlg_open.ShowDialog() == DialogResult.OK)
{
file_name = dlg_open.FileName;
DirectoryInfo info = new DirectoryInfo(file_name);
if (info.Extension != ".xml")
{
toolStripLabelnfo.Text = "Файл имеет неверное расширение";
return;
}
toolStripLabelnfo.Text = "Файл открыт: " + info.Name;
XmlSerializer formatter = new XmlSerializer(typeof(List <Student>));
using FileStream fs = new FileStream(file_name, FileMode.OpenOrCreate);
try
{
students = new StudentsCollection((List <Student>)formatter.Deserialize(fs));
need_updated = false;
SetButtonEnable(TypeAction.Prev, false);
deleteStudent.Enabled = true;
if (students.students_list.Count == 0)
{
deleteStudent.Enabled = false;
SetButtonEnable(TypeAction.Next, false);
}
else
{
button_update.Enabled = true;
deleteStudent.Enabled = true;
SetButtonEnable(TypeAction.Next, true);
}
if (students.GetEnumerator().MoveFirst())
{
FirstNameTextBox.Text = students.Current.FirstName;
SecondNameTextBox.Text = students.Current.SecondName;
FacultyTextBox.Text = students.Current.Faculty;
}
}
catch
{
toolStripLabelnfo.Text = "Файл пустой";
}
}
}
private void Previous_Click(object sender, EventArgs e) //кнопка предыдущий на форме
{
button_update.Enabled = true;
SetButtonEnable(TypeAction.Next, true);
if (students.GetEnumerator().MovePrev())
{
FirstNameTextBox.Text = students.Current.FirstName;
SecondNameTextBox.Text = students.Current.SecondName;
FacultyTextBox.Text = students.Current.Faculty;
if (students.GetEnumerator().IsFirst())
{
SetButtonEnable(TypeAction.Prev, false);
}
}
else
{
SetButtonEnable(TypeAction.Prev, false);
}
}
