ADDED another error message and fixed the height of my new entry window. and added input sanitization for new entries

Project.Controller/InputSanitizer.cs

@@ -21,4 +21,23 @@ public partial class InputSanitizer
         if (string.IsNullOrEmpty(username) || username.Length < 4) return false;
         else return true;
     }
+    
+    //NewEntry - Name Check
+    public static bool EntryName(string name)
+    {
+        if (string.IsNullOrEmpty(name)) return false;
+        else return true;
+    }
+    //NewEntry - user/mailcheck
+    public static bool Userormail(string usermail)
+    {
+        if (string.IsNullOrEmpty(usermail)) return false;
+        else return true;
+    }
+    //NewEntry - password check
+    public static bool Password(string pass)
+    {
+        if (string.IsNullOrEmpty(pass) || pass.Length < 6) return false;
+        else return true;
+    }
 }

Project.View/EntryErrorPopup/EntryErrorPopup.axaml

@@ -0,0 +1,57 @@
+<Window
+    SizeToContent="Height"
+    Title="WARNING"
+    Width="500"
+    WindowStartupLocation="CenterOwner"
+    x:Class="Project.View.EntryErrorPopUp"
+    xmlns="https://github.com/avaloniaui"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+
+    <Window.Styles>
+        <Style Selector="TextBlock">
+            <Setter Property="HorizontalAlignment" Value="Center" />
+            <Setter Property="FontSize" Value="14" />
+            <Setter Property="Foreground" Value="Gray" />
+            <Setter Property="TextWrapping" Value="Wrap" />
+            <Setter Property="Margin" Value="0,5" />
+        </Style>
+        <Style Selector="Button">
+            <Setter Property="Width" Value="120" />
+            <Setter Property="Height" Value="40" />
+            <Setter Property="CornerRadius" Value="20" />
+            <Setter Property="Margin" Value="0,15,0,0" />
+            <Setter Property="HorizontalAlignment" Value="Center" />
+            <Setter Property="HorizontalContentAlignment" Value="Center" />
+            <Setter Property="VerticalContentAlignment" Value="Center" />
+            <Setter Property="Background" Value="#4CAF50" />
+            <Setter Property="Foreground" Value="White" />
+        </Style>
+    </Window.Styles>
+
+    <Grid Background="#F5F5F5">
+        <Border
+            Background="White"
+            BoxShadow="0 4 8 0 #40000000"
+            CornerRadius="8"
+            Margin="15">
+
+            <ScrollViewer>
+                <StackPanel Margin="20" MaxWidth="450">
+                    <TextBlock
+                        FontSize="24"
+                        FontWeight="Bold"
+                        Margin="0,0,0,15"
+                        Text="⚠️ Warning" />
+                    <TextBlock Text="Please fill out all the boxes except note and/or URL." />
+                    <TextBlock Text="Your password should be at least 6 characters long." />
+                    <TextBlock Text="I recommend a password length of 12 characters or more." />
+
+                    <Button
+                        Click="EntryError_Click"
+                        Content="OK"
+                        Margin="0,15,0,5" />
+                </StackPanel>
+            </ScrollViewer>
+        </Border>
+    </Grid>
+</Window>

Project.View/EntryErrorPopup/EntryErrorPopup.axaml.cs

@@ -0,0 +1,22 @@
+using System;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Media;
+using Project.Controller;
+using Project.Model;
+using Project.Persistence;
+namespace Project.View;
+
+public partial class EntryErrorPopUp : Window
+
+{
+    public EntryErrorPopUp()
+    {
+        InitializeComponent();
+    }
+
+    private void EntryError_Click(object? sender, RoutedEventArgs e)
+    {
+        Close();
+    }
+}

Project.View/NewEntry/NewEntry.axaml.cs

@@ -1,3 +1,4 @@
+using System;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
 using Avalonia.Media;
@@ -11,6 +12,7 @@ public partial class NewEntry : Window
     public NewEntry()
     {
         InitializeComponent();
+        this.SizeToContent = SizeToContent.Height;
     }
 
     public NewEntry(AppController controller)
@@ -30,21 +32,35 @@ public partial class NewEntry : Window
         string? url = URLBox.Text;
         string? pass = PassBox.Text;
         string? note = NoteBox.Text;
-        AppController.NewEntrySave(name, username, url, pass, note);
+        if (InputSanitizer.EntryName(name) && InputSanitizer.Password(pass) && InputSanitizer.Userormail(username))
-        var newMenuView = new MenuView();
+        {
-        newMenuView.AfterSavingNewEntry();
+            AppController.NewEntrySave(name, username, url, pass, note);
-        Close();
+            var newMenuView = new MenuView();
+            newMenuView.AfterSavingNewEntry();
+            Close();
+        }
+        else
+        {
+            var newPopUp = new EntryErrorPopUp();
+            NameBox.Text = string.Empty;
+            UsernameMailBox.Text = string.Empty;
+            URLBox.Text = String.Empty;
+            PassBox.Text = String.Empty;
+            NoteBox.Text = String.Empty;
+            newPopUp.Show();
+        }
+        
     }
 
     private void NewEntry_ShowPW_Click(object? sender, RoutedEventArgs e)
     {
-        if (NewentryPW.PasswordChar == '*')
+        if (NewentryPW.PasswordChar == '•')
         {
             NewentryPW.PasswordChar = '\0';
         }
         else
         {
-            NewentryPW.PasswordChar = '*';
+            NewentryPW.PasswordChar = '•';
         }
     }
     

Project.View/PopUp/PopUp.axaml

@@ -45,7 +45,8 @@
                     <TextBlock Text="One or more entries are wrong or missing." />
                     <TextBlock Text="All boxes must be filled in." />
                     <TextBlock Text="Your username needs to be at least 4 characters." />
-                    <TextBlock Text="Your password needs to be at least 8 characters." />
+                    <TextBlock Text="Your password needs to be at least 6 characters." />
+                    <TextBlock Text="I recommend a password length of 12 characters or more." />
                     <TextBlock Text="Make sure your e-mail is correct." />
 
                     <Button

Project.View/Project.View.csproj

@@ -40,6 +40,10 @@
       <DependentUpon>PopUp.axaml</DependentUpon>
       <SubType>Code</SubType>
     </Compile>
+    <Compile Update="EntryErrorPopup\EntryErrorPopup.axaml.cs">
+      <DependentUpon>EntryErrorPopup.axaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
   </ItemGroup>
 
   <ItemGroup>