diff --git a/Correlator/ViewModels/BigPictureViewModel.cs b/Correlator/ViewModels/BigPictureViewModel.cs
index 7f1a055..4dd9fc9 100644
--- a/Correlator/ViewModels/BigPictureViewModel.cs
+++ b/Correlator/ViewModels/BigPictureViewModel.cs
@@ -1,6 +1,6 @@
 using System;
+using System.IO;
 using System.Windows.Media.Imaging;
-using Prism.Commands;
 using Prism.Mvvm;
 using Prism.Services.Dialogs;
 
@@ -8,7 +8,7 @@
 {
     public class BigPictureViewModel : BindableBase, IDialogAware
     {
-        public string Title => string.Empty;
+        public string Title { get; set; }
         private BitmapImage _bigPictureBitmapImage;
 
         public BitmapImage BigPictureBitmapImage
@@ -22,17 +22,6 @@
         }
 
         public event Action<IDialogResult> RequestClose;
-        public DelegateCommand CloseWindowCommand { get; set; }
-
-        public BigPictureViewModel()
-        {
-            CloseWindowCommand = new DelegateCommand(CloseWindow);
-        }
-
-        private void CloseWindow()
-        {
-            RequestClose?.Invoke(new DialogResult(ButtonResult.Cancel));
-        }
 
         public bool CanCloseDialog()
         {
@@ -46,6 +35,7 @@
         public void OnDialogOpened(IDialogParameters parameters)
         {
             var imageFullPath = parameters.GetValue<string>("ImageFullPath");
+            Title = Path.GetFileName(imageFullPath);
             BigPictureBitmapImage = new BitmapImage(new Uri(imageFullPath, UriKind.Absolute));
         }
     }

diff --git a/Correlator/ViewModels/BigPictureViewModel.cs b/Correlator/ViewModels/BigPictureViewModel.cs
index 7f1a055..4dd9fc9 100644
--- a/Correlator/ViewModels/BigPictureViewModel.cs
+++ b/Correlator/ViewModels/BigPictureViewModel.cs
@@ -1,6 +1,6 @@
 using System;
+using System.IO;
 using System.Windows.Media.Imaging;
-using Prism.Commands;
 using Prism.Mvvm;
 using Prism.Services.Dialogs;
 
@@ -8,7 +8,7 @@
 {
     public class BigPictureViewModel : BindableBase, IDialogAware
     {
-        public string Title => string.Empty;
+        public string Title { get; set; }
         private BitmapImage _bigPictureBitmapImage;
 
         public BitmapImage BigPictureBitmapImage
@@ -22,17 +22,6 @@
         }
 
         public event Action<IDialogResult> RequestClose;
-        public DelegateCommand CloseWindowCommand { get; set; }
-
-        public BigPictureViewModel()
-        {
-            CloseWindowCommand = new DelegateCommand(CloseWindow);
-        }
-
-        private void CloseWindow()
-        {
-            RequestClose?.Invoke(new DialogResult(ButtonResult.Cancel));
-        }
 
         public bool CanCloseDialog()
         {
@@ -46,6 +35,7 @@
         public void OnDialogOpened(IDialogParameters parameters)
         {
             var imageFullPath = parameters.GetValue<string>("ImageFullPath");
+            Title = Path.GetFileName(imageFullPath);
             BigPictureBitmapImage = new BitmapImage(new Uri(imageFullPath, UriKind.Absolute));
         }
     }
diff --git a/Correlator/ViewModels/MainWindowViewModel.cs b/Correlator/ViewModels/MainWindowViewModel.cs
index 3e03006..88f521e 100644
--- a/Correlator/ViewModels/MainWindowViewModel.cs
+++ b/Correlator/ViewModels/MainWindowViewModel.cs
@@ -956,18 +956,16 @@
                 var ports = SerialPort.GetPortNames();
                 foreach (var portName in ports)
                 {
-                    if (portName != RuntimeCache.PortName && !_serialPortService.Sp.IsOpen)
-                    {
-                        _serialPortService.Sp.PortName = portName;
-                        _serialPortService.Sp.BaudRate = 230400;
-                        _serialPortService.Sp.DataBits = 8;
-                        _serialPortService.Sp.StopBits = (StopBits)1;
-                        _serialPortService.Sp.Open();
-                        "MainWindowViewModel".WriteLog("打开串口");
+                    if (portName != RuntimeCache.PortName || _serialPortService.Sp.IsOpen) continue;
+                    _serialPortService.Sp.PortName = portName;
+                    _serialPortService.Sp.BaudRate = 230400;
+                    _serialPortService.Sp.DataBits = 8;
+                    _serialPortService.Sp.StopBits = (StopBits)1;
+                    _serialPortService.Sp.Open();
+                    "MainWindowViewModel".WriteLog("打开串口");
 
-                        ConnectColorBrush = "LimeGreen";
-                        break;
-                    }
+                    ConnectColorBrush = "LimeGreen";
+                    break;
                 }
 
                 if (_serialPortService.Sp.IsOpen)

diff --git a/Correlator/ViewModels/BigPictureViewModel.cs b/Correlator/ViewModels/BigPictureViewModel.cs
index 7f1a055..4dd9fc9 100644
--- a/Correlator/ViewModels/BigPictureViewModel.cs
+++ b/Correlator/ViewModels/BigPictureViewModel.cs
@@ -1,6 +1,6 @@
 using System;
+using System.IO;
 using System.Windows.Media.Imaging;
-using Prism.Commands;
 using Prism.Mvvm;
 using Prism.Services.Dialogs;
 
@@ -8,7 +8,7 @@
 {
     public class BigPictureViewModel : BindableBase, IDialogAware
     {
-        public string Title => string.Empty;
+        public string Title { get; set; }
         private BitmapImage _bigPictureBitmapImage;
 
         public BitmapImage BigPictureBitmapImage
@@ -22,17 +22,6 @@
         }
 
         public event Action<IDialogResult> RequestClose;
-        public DelegateCommand CloseWindowCommand { get; set; }
-
-        public BigPictureViewModel()
-        {
-            CloseWindowCommand = new DelegateCommand(CloseWindow);
-        }
-
-        private void CloseWindow()
-        {
-            RequestClose?.Invoke(new DialogResult(ButtonResult.Cancel));
-        }
 
         public bool CanCloseDialog()
         {
@@ -46,6 +35,7 @@
         public void OnDialogOpened(IDialogParameters parameters)
         {
             var imageFullPath = parameters.GetValue<string>("ImageFullPath");
+            Title = Path.GetFileName(imageFullPath);
             BigPictureBitmapImage = new BitmapImage(new Uri(imageFullPath, UriKind.Absolute));
         }
     }
diff --git a/Correlator/ViewModels/MainWindowViewModel.cs b/Correlator/ViewModels/MainWindowViewModel.cs
index 3e03006..88f521e 100644
--- a/Correlator/ViewModels/MainWindowViewModel.cs
+++ b/Correlator/ViewModels/MainWindowViewModel.cs
@@ -956,18 +956,16 @@
                 var ports = SerialPort.GetPortNames();
                 foreach (var portName in ports)
                 {
-                    if (portName != RuntimeCache.PortName && !_serialPortService.Sp.IsOpen)
-                    {
-                        _serialPortService.Sp.PortName = portName;
-                        _serialPortService.Sp.BaudRate = 230400;
-                        _serialPortService.Sp.DataBits = 8;
-                        _serialPortService.Sp.StopBits = (StopBits)1;
-                        _serialPortService.Sp.Open();
-                        "MainWindowViewModel".WriteLog("打开串口");
+                    if (portName != RuntimeCache.PortName || _serialPortService.Sp.IsOpen) continue;
+                    _serialPortService.Sp.PortName = portName;
+                    _serialPortService.Sp.BaudRate = 230400;
+                    _serialPortService.Sp.DataBits = 8;
+                    _serialPortService.Sp.StopBits = (StopBits)1;
+                    _serialPortService.Sp.Open();
+                    "MainWindowViewModel".WriteLog("打开串口");
 
-                        ConnectColorBrush = "LimeGreen";
-                        break;
-                    }
+                    ConnectColorBrush = "LimeGreen";
+                    break;
                 }
 
                 if (_serialPortService.Sp.IsOpen)
diff --git a/Correlator/Views/BigPictureView.xaml b/Correlator/Views/BigPictureView.xaml
index 36104fd..001303b 100644
--- a/Correlator/Views/BigPictureView.xaml
+++ b/Correlator/Views/BigPictureView.xaml
@@ -14,47 +14,12 @@
     <prism:Dialog.WindowStyle>
         <Style TargetType="Window">
             <Setter Property="prism:Dialog.WindowStartupLocation" Value="CenterOwner" />
-            <Setter Property="ShowInTaskbar" Value="False" />
-            <Setter Property="WindowStyle" Value="None" />
             <Setter Property="WindowState" Value="Maximized" />
-            <Setter Property="ResizeMode" Value="NoResize" />
+            <Setter Property="ResizeMode" Value="CanResize" />
         </Style>
     </prism:Dialog.WindowStyle>
 
     <Grid>
-        <Image Source="{Binding BigPictureBitmapImage}" />
-
-        <Button
-            Width="90"
-            Height="90"
-            Margin="0,0,11,11"
-            Command="{Binding CloseWindowCommand}"
-            Content="&#xe668;"
-            FontFamily="/Correlator;component/Fonts/#iconfont">
-            <Button.Style>
-                <Style TargetType="Button">
-                    <Setter Property="HorizontalContentAlignment" Value="Right" />
-                    <Setter Property="VerticalContentAlignment" Value="Bottom" />
-                    <Setter Property="HorizontalAlignment" Value="Right" />
-                    <Setter Property="VerticalAlignment" Value="Bottom" />
-                    <Setter Property="Foreground" Value="White" />
-                    <Setter Property="FontSize" Value="50" />
-                    <Setter Property="Template">
-                        <Setter.Value>
-                            <ControlTemplate TargetType="Button">
-                                <Border
-                                    x:Name="ButtonContainerBorder"
-                                    Padding="0,0,11,11"
-                                    Background="Red"
-                                    BorderThickness="0"
-                                    CornerRadius="90 0 0 0">
-                                    <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalAlignment}" VerticalAlignment="{TemplateBinding VerticalAlignment}" />
-                                </Border>
-                            </ControlTemplate>
-                        </Setter.Value>
-                    </Setter>
-                </Style>
-            </Button.Style>
-        </Button>
+        <Image Source="{Binding BigPictureBitmapImage}" Stretch="Fill" />
     </Grid>
 </UserControl>
\ No newline at end of file