Release 3.0.2 — WinForms .NET 48, CapsLock language switch, GitHub update checker

Author: sumonchai

setup.iss

@@ -1,5 +1,5 @@
 #define AppName    "Switch Input Language"
-#define AppVersion "3.0.0"
+#define AppVersion "3.0.2"
 #define AppExe     "SwitchInputLanguage.exe"
 #define AppPublisher "LAO Work Space"
 

src/Program.cs

@@ -37,6 +37,10 @@ static void Main()
                 hook.ResetState();
             });
             menu.Items.Add(new ToolStripSeparator());
+            menu.Items.Add("ตรวจหาการอัปเดต...", null, (s, e) =>
+            {
+                UpdateChecker.CheckForUpdate(null);
+            });
             menu.Items.Add("เกี่ยวกับ", null, (s, e) =>
                 Process.Start(new ProcessStartInfo("https://github.com/sumonchai/Switch-Input-Language") { UseShellExecute = true }));
             menu.Items.Add(new ToolStripSeparator());

src/SwitchInputLanguage.csproj

@@ -9,6 +9,9 @@
     <LangVersion>latest</LangVersion>
     <PlatformTarget>x64</PlatformTarget>
     <ApplicationIcon>media\LJ LOGO.ico</ApplicationIcon>
+    <Version>3.0.2</Version>
+    <FileVersion>3.0.2.0</FileVersion>
+    <AssemblyVersion>3.0.2.0</AssemblyVersion>
   </PropertyGroup>
 
   <!-- copy icon ไปพร้อม EXE -->

src/UpdateChecker.cs

@@ -0,0 +1,84 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Net;
+using System.Reflection;
+using System.Windows.Forms;
+
+namespace SwitchInputLanguage
+{
+    public static class UpdateChecker
+    {
+        private const string Owner = "sumonchai";
+        private const string Repo = "Switch-Input-Language";
+        private const string ApiUrl = "https://api.github.com/repos/" + Owner + "/" + Repo + "/releases/latest";
+
+        private static readonly Version CurrentVersion = Assembly.GetExecutingAssembly().GetName().Version;
+
+        public static void CheckForUpdate(Form owner)
+        {
+            try
+            {
+                var request = (HttpWebRequest)WebRequest.Create(ApiUrl);
+                request.UserAgent = "SwitchInputLanguage";
+                request.Timeout = 8000;
+
+                using var response = request.GetResponse();
+                using var reader = new StreamReader(response.GetResponseStream());
+                string json = reader.ReadToEnd();
+
+                string tag = ParseTag(json);
+                if (string.IsNullOrEmpty(tag)) return;
+
+                string versionStr = tag.TrimStart('v', 'V', 'r');
+                if (!Version.TryParse(versionStr, out Version latest)) return;
+
+                if (latest > CurrentVersion)
+                {
+                    var result = MessageBox.Show(
+                        $"มีเวอร์ชันใหม่: {tag}\nเวอร์ชันปัจจุบัน: {CurrentVersion}\n\nต้องการดาวน์โหลดเลยหรือไม่?",
+                        "พบการอัปเดต",
+                        MessageBoxButtons.YesNo,
+                        MessageBoxIcon.Information);
+
+                    if (result == DialogResult.Yes)
+                    {
+                        string downloadUrl = ParseDownloadUrl(json);
+                        if (!string.IsNullOrEmpty(downloadUrl))
+                            Process.Start(new ProcessStartInfo(downloadUrl) { UseShellExecute = true });
+                    }
+                }
+                else
+                {
+                    MessageBox.Show("คุณใช้เวอร์ชันล่าสุดแล้ว", "ไม่มีการอัปเดต", MessageBoxButtons.OK, MessageBoxIcon.Information);
+                }
+            }
+            catch (WebException)
+            {
+                MessageBox.Show("ไม่สามารถเชื่อมต่ออินเทอร์เน็ตได้", "ข้อผิดพลาด", MessageBoxButtons.OK, MessageBoxIcon.Warning);
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"เกิดข้อผิดพลาด: {ex.Message}", "ข้อผิดพลาด", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
+        private static string ParseTag(string json)
+        {
+            int i = json.IndexOf("\"tag_name\"");
+            if (i < 0) return null;
+            int q1 = json.IndexOf('"', i + 10);
+            int q2 = json.IndexOf('"', q1 + 1);
+            return q1 >= 0 && q2 > q1 ? json.Substring(q1 + 1, q2 - q1 - 1) : null;
+        }
+
+        private static string ParseDownloadUrl(string json)
+        {
+            int i = json.IndexOf("\"browser_download_url\"");
+            if (i < 0) return null;
+            int q1 = json.IndexOf('"', i + 23);
+            int q2 = json.IndexOf('"', q1 + 1);
+            return q1 >= 0 && q2 > q1 ? json.Substring(q1 + 1, q2 - q1 - 1) : null;
+        }
+    }
+}