diff --git a/MainWindow.xaml b/MainWindow.xaml
index 6fd0ddf..2b14ac4 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -8,7 +8,8 @@
         Title="SUNLIGHT_CDKEY" Height="400" Width="600">
     <Grid>
         <TextBlock HorizontalAlignment="Left" Height="40" Margin="20,10,0,0" TextWrapping="Wrap" Text="SN:" VerticalAlignment="Top" Width="170" FontSize="24"/>
-        <TextBox x:Name="sn_id" HorizontalAlignment="Left" Height="40" Margin="170,10,0,0" VerticalAlignment="Top" Width="340" FontSize="24"/>
+        <TextBox x:Name="sn_id" HorizontalAlignment="Left" Height="40" Margin="170,10,0,0" VerticalAlignment="Top" Width="340" FontSize="24" 
+                 PreviewTextInput="AlphanumericValidationTextBox" InputMethod.IsInputMethodEnabled="False"/>
         <TextBlock HorizontalAlignment="Left" Height="40" Margin="20,55,0,0" TextWrapping="Wrap" Text="DURATION:" VerticalAlignment="Top" Width="170" FontSize="24"/>
         <TextBlock HorizontalAlignment="Left" Height="40" Margin="400,55,0,0" TextWrapping="Wrap" Text="MONTHS" VerticalAlignment="Top" Width="170" FontSize="24"/>
         <ComboBox x:Name="DURATION"  HorizontalAlignment="Left" Height="40" Margin="170,55,0,0" VerticalAlignment="Top" Width="220"  DropDownClosed="DURATION_DropDownClosed" FontSize="24">
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 753e694..833d190 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -31,6 +31,15 @@ namespace SUNLIGHT_CDKEY
             T_M.Text = DateTime.Now.ToString("MM");
             T_D.Text = DateTime.Now.ToString("dd");
         }
+        private void AlphanumericValidationTextBox(object sender, TextCompositionEventArgs e)
+        {
+            Regex regex = new Regex(@"[^a-eA-E0-9]+$");
+            e.Handled = regex.IsMatch(e.Text.ToUpper());
+        }
+        private void validation_PreviewKeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Space) e.Handled = true;
+        }
 
         private void Tb_KeyFloating_D(object sender, TextCompositionEventArgs e)//输入事件
         {
@@ -109,13 +118,19 @@ namespace SUNLIGHT_CDKEY
             string a;
             string b, my, mm, md;
 
-            if (sn_id.Text.Length <6)//id字节长度大于6有效
+            sn_id.Text = sn_id.Text.ToUpper();
+
+            if (sn_id.Text.Length < 6)//id字节长度大于6有效
             {
-                sn_id.BorderBrush = new SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 255,0, 0));
+                sn_id.BorderBrush = new SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 255, 0, 0));
                 return;
-            }else sn_id.BorderBrush = new SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 255, 255, 255));
+            }
+            else 
+            { 
+                sn_id.BorderBrush = new SolidColorBrush(System.Windows.Media.Color.FromArgb(255, 255, 255, 255));
+            }
 
-            a= sn_id.Text.Substring(0, 6);
+            a= sn_id.Text.Substring(5, 1)+ sn_id.Text.Substring(0, 1)+ sn_id.Text.Substring(4, 1) + sn_id.Text.Substring(1, 1) + sn_id.Text.Substring(3, 1)+ sn_id.Text.Substring(2, 1);
        
             my = Convert.ToString(Convert.ToInt32(2255 - y), 16).ToUpper();
             mm = Convert.ToString(Convert.ToInt32(255 - m), 16).ToUpper();