From a5e9edb2e545252cbf75c7e366e60c76ff0712e2 Mon Sep 17 00:00:00 2001
From: 2dust <31833384+2dust@users.noreply.github.com>
Date: Fri, 29 Jul 2022 20:59:07 +0800
Subject: [PATCH 1/2] CheckForDotNetVersion

---
 v2rayN/v2rayN/Forms/MainForm.cs       | 10 ++++++++--
 v2rayN/v2rayN/Resx/ResUI.Designer.cs  |  9 +++++++++
 v2rayN/v2rayN/Resx/ResUI.resx         |  3 +++
 v2rayN/v2rayN/Resx/ResUI.zh-Hans.resx |  3 +++
 v2rayN/v2rayN/Tool/Utils.cs           |  2 +-
 5 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/v2rayN/v2rayN/Forms/MainForm.cs b/v2rayN/v2rayN/Forms/MainForm.cs
index eff1d682..086c41df 100644
--- a/v2rayN/v2rayN/Forms/MainForm.cs
+++ b/v2rayN/v2rayN/Forms/MainForm.cs
@@ -87,6 +87,12 @@ namespace v2rayN.Forms
             MainFormHandler.Instance.RegisterGlobalHotkey(config, OnHotkeyHandler, UpdateTaskHandler);
 
             _ = LoadV2ray();
+
+            if (!Utils.CheckForDotNetVersion())
+            {
+                UI.ShowWarning(ResUI.NetFrameworkRequirementsTip);
+                AppendText(false, ResUI.NetFrameworkRequirementsTip);
+            }
         }
 
         private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
@@ -340,7 +346,7 @@ namespace v2rayN.Forms
             if (index >= 0 && index < lvServers.Items.Count && lvServers.Items.Count > 0)
             {
                 lvServers.Items[index].Selected = true;
-                lvServers.EnsureVisible(index); // workaround
+                lvServers.SetScrollPosition(index);
             }
         }
 
@@ -1139,7 +1145,7 @@ namespace v2rayN.Forms
             if (index >= 0 && index < lvServers.Items.Count && lvServers.Items.Count > 0)
             {
                 lvServers.Items[index].Selected = true;
-                lvServers.EnsureVisible(index); // workaround
+                lvServers.SetScrollPosition(index); 
             }
 
             SetVisibleCore(true);
diff --git a/v2rayN/v2rayN/Resx/ResUI.Designer.cs b/v2rayN/v2rayN/Resx/ResUI.Designer.cs
index 789e013c..194e520b 100644
--- a/v2rayN/v2rayN/Resx/ResUI.Designer.cs
+++ b/v2rayN/v2rayN/Resx/ResUI.Designer.cs
@@ -708,6 +708,15 @@ namespace v2rayN.Resx {
             }
         }
         
+        /// <summary>
+        ///   查找类似 Normal use of this version requires .NET Framework 4.8 的本地化字符串。
+        /// </summary>
+        internal static string NetFrameworkRequirementsTip {
+            get {
+                return ResourceManager.GetString("NetFrameworkRequirementsTip", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 Non-VMess or ss protocol 的本地化字符串。
         /// </summary>
diff --git a/v2rayN/v2rayN/Resx/ResUI.resx b/v2rayN/v2rayN/Resx/ResUI.resx
index 0aa08ec9..c329bf6c 100644
--- a/v2rayN/v2rayN/Resx/ResUI.resx
+++ b/v2rayN/v2rayN/Resx/ResUI.resx
@@ -472,4 +472,7 @@
   <data name="MsgServerTitle" xml:space="preserve">
     <value>Servers (Filter : {0})</value>
   </data>
+  <data name="NetFrameworkRequirementsTip" xml:space="preserve">
+    <value>Normal use of this version requires .NET Framework 4.8</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/v2rayN/Resx/ResUI.zh-Hans.resx b/v2rayN/v2rayN/Resx/ResUI.zh-Hans.resx
index f4c8cc69..d76eacd5 100644
--- a/v2rayN/v2rayN/Resx/ResUI.zh-Hans.resx
+++ b/v2rayN/v2rayN/Resx/ResUI.zh-Hans.resx
@@ -472,4 +472,7 @@
   <data name="MsgServerTitle" xml:space="preserve">
     <value>服务器 (过滤器 : {0})</value>
   </data>
+  <data name="NetFrameworkRequirementsTip" xml:space="preserve">
+    <value>正常使用此版本需要.NET Framework 4.8，请更新后重启</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/v2rayN/v2rayN/Tool/Utils.cs b/v2rayN/v2rayN/Tool/Utils.cs
index 54f65f35..c3fd29b5 100644
--- a/v2rayN/v2rayN/Tool/Utils.cs
+++ b/v2rayN/v2rayN/Tool/Utils.cs
@@ -694,7 +694,7 @@ namespace v2rayN
         /// </summary>
         /// <param name="release">需要的版本4.6.2=394802;4.8=528040</param>
         /// <returns></returns>
-        public static bool GetDotNetRelease(int release)
+        public static bool CheckForDotNetVersion(int release = 528040)
         {
             const string subkey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\";
             using (RegistryKey ndpKey = RegistryKey.OpenBaseKey(RegistryHive.LocalMachine, RegistryView.Registry32).OpenSubKey(subkey))

From 5aa27c14c63234de94a197ade6258bdb12a95b1d Mon Sep 17 00:00:00 2001
From: 2dust <31833384+2dust@users.noreply.github.com>
Date: Fri, 29 Jul 2022 20:59:12 +0800
Subject: [PATCH 2/2] Update ListViewFlickerFree.cs

---
 v2rayN/v2rayN/Base/ListViewFlickerFree.cs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/v2rayN/v2rayN/Base/ListViewFlickerFree.cs b/v2rayN/v2rayN/Base/ListViewFlickerFree.cs
index 4d34e2c0..94e803e9 100644
--- a/v2rayN/v2rayN/Base/ListViewFlickerFree.cs
+++ b/v2rayN/v2rayN/Base/ListViewFlickerFree.cs
@@ -93,5 +93,20 @@ namespace v2rayN.Base
             DoDragDrop(e.Item, DragDropEffects.Move);
             InsertionMark.Index = -1;
         }
+        public void SetScrollPosition(int pos)
+        {
+            pos = Math.Min(Items.Count - 1, pos);
+
+            if (pos < 0 || pos >= Items.Count)
+                return;
+
+            EnsureVisible(pos);
+
+            for (int i = 0; i < 10; i++)
+            {
+                if (TopItem != null && TopItem.Index != pos)
+                    TopItem = Items[pos];
+            }
+        }
     }
 }
\ No newline at end of file