update

Models/MainWindowModel.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace VideoConcat.Models
+{
+    internal class MainWindowModel
+    {
+        public string? UserName { get; set; }
+        public string? PassWord { get; set; }
+    }
+}

VideoConcat.csproj

@@ -28,9 +28,4 @@
     </None>
   </ItemGroup>
 
-  <ItemGroup>
-    <Folder Include="Models\" />
-    <Folder Include="ViewModels\" />
-  </ItemGroup>
-
 </Project>

ViewModels/MainWindowViewModel.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using VideoConcat.Models;
+
+namespace VideoConcat.ViewModels
+{
+    internal class MainWindowViewModel
+    {
+
+        public MainWindowModel MainWindowsModel { get; set; } = new MainWindowModel();
+
+        public void Login()
+        {
+            string userName = MainWindowsModel.UserName;
+            string passWord = MainWindowsModel.PassWord;
+        }
+    }
+}

Views/MainWindow.xaml

@@ -1,4 +1,4 @@
-<Window x:Class="VideoConcat.MainWindow"
+<Window x:Class="VideoConcat.Views.MainWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
@@ -33,7 +33,7 @@
                             <materialDesign:PackIcon
                                 Width="30" Height="30" 
                                 Kind="User" Margin="10,0,10,0"/>
-                            <TextBox x:Name="txtUserName" Width="400"
+                            <TextBox Text="{Binding MainWindowModel.UserName}" Width="400"
                                      Margin="10,0" BorderBrush="White"
                                      CaretBrush="#FFD94448" 
                                      SelectionBrush="#FFD94448"
@@ -43,17 +43,20 @@
                             <materialDesign:PackIcon
                                  Width="30" Height="30"
                                  Kind="Lock" Margin="10,0,10,0"/>
-                            <PasswordBox x:Name="txtPassword" Width="400"
+                            <PasswordBox  
+                                      Width="400"
                                       Margin="10,0" BorderBrush="White"
                                       CaretBrush="#FFD94448" 
                                       SelectionBrush="#FFD94448"
                                       materialDesign:HintAssist.Hint="输入 密码"
-                                      />
+                                     local:MainWindowModel="{Binding MainWindowModel.Password}"
+                                      >
+                            </PasswordBox>
                         </StackPanel>
                         <StackPanel Margin="10" HorizontalAlignment="Center" VerticalAlignment="Center">
                             <Button  x:Name="btnLogin" Width="100" Height="40"
-                                     materialDesign:ButtonAssist.CornerRadius="10"
+                                     materialDesign:ButtonAssist.CornerRadius="5"
-                                     Background="#D94448" BorderBrush="#D94448" BorderThickness="2"
+                                     Background="#40568D" BorderBrush="#7F7F7F" BorderThickness="2"
                                      Content="登录" ToolTip="登录"
                                      Style="{StaticResource MaterialDesignRaisedButton}" Click="BtnLogin_Click"/>
                         </StackPanel>

Views/MainWindow.xaml.cs

@@ -1,7 +1,8 @@
 using System.Windows;
 using System.Windows.Input;
+using VideoConcat.Models;
 
-namespace VideoConcat
+namespace VideoConcat.Views
 {
     /// <summary>
     /// Interaction logic for MainWindow.xaml
@@ -11,6 +12,7 @@ namespace VideoConcat
         public MainWindow()
         {
             InitializeComponent();
+            this.DataContext = new MainWindowModel();
         }
 
         private void BtnExit_Click(object sender, RoutedEventArgs e)
@@ -18,14 +20,6 @@ namespace VideoConcat
             this.Close();
         }
 
-        private void Grid_MouseDown(object sender, MouseButtonEventArgs e)
-        {
-            if (Mouse.LeftButton == MouseButtonState.Pressed)
-            {
-                this.DragMove();
-            }
-        }
-
         private void BtnLogin_Click(object sender, RoutedEventArgs e)
         {
         }