[chore:] implemented student view

MainWindow.axaml.cs

@@ -103,14 +103,95 @@ public partial class MainWindow : Window
     private void RefreshImportedStudentList()
     {
         LbStudentsImported.Items.Clear();
+        int count_selected = 0;
         foreach (var s in Settings.Instance.Students)
         {
             LbStudentsImported.Items.Add(s);
+            count_selected += s.SelectedCourseNames.Count;
         }
+        LblStudentAmount.Content =  Settings.Instance.Students.Count.ToString();
+        LblSelectedAmount.Content =  count_selected.ToString();
+        
+        
     }
 
     private void BtnCraftCourses_OnClick(object? sender, RoutedEventArgs e)
     {
         // Craft courses here / call course-crafter
     }
+
+    private void LbStudentsImported_OnSelectionChanged(object? sender, SelectionChangedEventArgs e)
+    {
+        Prepare();
+        var stud = (Student)LbStudentsImported.SelectedItem;
+        if (stud == null)
+        {
+            TbStudentName.Text = string.Empty;
+            TbStudentID.Text = string.Empty;
+            SetEmpty();
+            return;
+        };
+
+        try
+        {
+            TbStudentName.Text = stud.Name;
+            TbStudentID.Text = stud.ID;
+            LblSport1.Content = stud.SelectedCourseNames[0];
+            LblSport2.Content = stud.SelectedCourseNames[1];
+            LblSport3.Content = stud.SelectedCourseNames[2];
+            LblSport4.Content = stud.SelectedCourseNames[3];
+        }
+        catch
+        {
+            SetEmpty();
+        }
+
+        return;
+        
+        void SetEmpty()
+        {
+            if(LblSport1.Content == "null") LblSport1.Content = "ungewählt";
+            if(LblSport2.Content == "null") LblSport2.Content = "ungewählt";
+            if(LblSport3.Content == "null") LblSport3.Content = "ungewählt";
+            if(LblSport4.Content == "null") LblSport4.Content = "ungewählt";
+        }
+
+        void Prepare()
+        {
+            LblSport1.Content = "null";
+            LblSport2.Content = "null";
+            LblSport3.Content = "null";
+            LblSport4.Content = "null";
+        }
+        
+    }
+
+    private void TbStudentName_OnTextChanged(object? sender, TextChangedEventArgs e)
+    {
+        try
+        {
+            ((Student)LbStudentsImported.SelectedItem).Name = TbStudentName.Text;
+            //int current = LbStudentsImported.SelectedIndex;
+            //RefreshImportedStudentList();
+            //LbStudentsImported.SelectedIndex = current;
+        }
+        catch
+        {
+            
+        }
+    }
+    private void TbStudentID_OnTextChanged(object? sender, TextChangedEventArgs e)
+    {
+        try
+        {
+            ((Student)LbStudentsImported.SelectedItem).Name = TbStudentID.Text;
+            //int current = LbStudentsImported.SelectedIndex;
+            //RefreshImportedStudentList();
+            //LbStudentsImported.SelectedIndex = current;
+        }
+        catch
+        {
+            
+        }
+    }
 }