Register Text Editor as a file type hander for .txt files

Text Editor.sln

@@ -5,8 +5,6 @@ VisualStudioVersion = 15.0.28307.1622
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Text Editor", "Text Editor\Text Editor.csproj", "{8A82FA64-B600-4A9A-8BA9-7790026E09E8}"
 EndProject
-Project("{840C416C-B8F3-42BC-B0DD-F6BB14C9F8CB}") = "Text Editor Setup", "Text Editor Setup\Text Editor Setup.aiproj", "{9ADA466B-06B1-4AD2-A7C8-545BE09B9688}"
-EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		All|Any CPU = All|Any CPU
@@ -20,12 +18,6 @@ Global
 		{8A82FA64-B600-4A9A-8BA9-7790026E09E8}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{8A82FA64-B600-4A9A-8BA9-7790026E09E8}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{8A82FA64-B600-4A9A-8BA9-7790026E09E8}.Release|Any CPU.Build.0 = Release|Any CPU
-		{9ADA466B-06B1-4AD2-A7C8-545BE09B9688}.All|Any CPU.ActiveCfg = DefaultBuild
-		{9ADA466B-06B1-4AD2-A7C8-545BE09B9688}.All|Any CPU.Build.0 = DefaultBuild
-		{9ADA466B-06B1-4AD2-A7C8-545BE09B9688}.Debug|Any CPU.ActiveCfg = DefaultBuild
-		{9ADA466B-06B1-4AD2-A7C8-545BE09B9688}.Debug|Any CPU.Build.0 = DefaultBuild
-		{9ADA466B-06B1-4AD2-A7C8-545BE09B9688}.Release|Any CPU.ActiveCfg = DefaultBuild
-		{9ADA466B-06B1-4AD2-A7C8-545BE09B9688}.Release|Any CPU.Build.0 = DefaultBuild
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Text Editor/Form1.cs

@@ -23,6 +23,33 @@ public Form1()
             mainEditor.WordWrap = Properties.Settings.Default.EnableWordWrap;
         }
 
+        public Form1(string fileName) : this()
+        {
+            if (fileName == null)
+                return;
+
+            if (!File.Exists(fileName))
+            {
+                MessageBox.Show("Invalid file name.", "Cannot open file", MessageBoxButtons.OK, MessageBoxIcon.Error);
+                return;
+            }
+            try
+            {
+                this.Text = Path.GetFileName(fileName) + " - Text Editor";
+                using (StreamReader sr = new StreamReader(fileName))
+                {
+                    path = fileName;
+                    Task<string> text = sr.ReadToEndAsync();
+                    mainEditor.Text = text.Result;
+                    this.Text = this.Text.Replace("*", "");
+                }
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Cannot open file", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            }
+        }
+
         public static void QuickReplace(RichTextBox rtb, String word, String word2)
         {
             rtb.Text = rtb.Text.Replace(word, word2);

Text Editor/Inno/installer.iss

@@ -0,0 +1,56 @@
+; Script generated by the Inno Setup Script Wizard.
+; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!
+
+#define MyAppName "Text Editor"
+#define MyAppVersion "1.1.2"
+#define MyAppPublisher "Zach, Inc."
+#define MyAppExeName "Text Editor.exe"
+#define MyAppAssocName "Text File"
+#define MyAppAssocExt ".txt"
+#define MyAppAssocKey StringChange(MyAppAssocName, " ", "") + MyAppAssocExt
+
+[Setup]
+; NOTE: The value of AppId uniquely identifies this application. Do not use the same AppId value in installers for other applications.
+; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
+AppId={{AEAF16D2-ED3B-417F-ABB6-B8A032C7CE2F}
+AppName={#MyAppName}
+AppVersion={#MyAppVersion}
+;AppVerName={#MyAppName} {#MyAppVersion}
+AppPublisher={#MyAppPublisher}
+DefaultDirName=C:\Program Files (x86)\{#MyAppName}
+ChangesAssociations=yes
+DisableProgramGroupPage=yes
+LicenseFile=C:\Users\zacha\Documents\License Agreement.rtf
+; Uncomment the following line to run in non administrative install mode (install for current user only.)
+;PrivilegesRequired=lowest
+OutputDir=C:\Users\zacha\source\repos\Text Editor\Text Editor\Inno
+OutputBaseFilename=Text_Editor_1_1_2_Setup
+Compression=lzma
+SolidCompression=yes
+WizardStyle=modern
+
+[Languages]
+Name: "english"; MessagesFile: "compiler:Default.isl"
+
+[Tasks]
+Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
+
+[Files]
+Source: "C:\Users\zacha\source\repos\Text Editor\Text Editor\bin\Debug\{#MyAppExeName}"; DestDir: "{app}"; Flags: ignoreversion
+Source: "C:\Users\zacha\source\repos\Text Editor\Text Editor\bin\Debug\textedit-help.chm"; DestDir: "{app}"; Flags: ignoreversion
+; NOTE: Don't use "Flags: ignoreversion" on any shared system files
+
+[Registry]
+Root: HKCR; Subkey: "{#MyAppAssocExt}\OpenWithProgids"; ValueType: string; ValueName: "{#MyAppAssocKey}"; ValueData: ""; Flags: uninsdeletevalue
+Root: HKCR; Subkey: "{#MyAppAssocKey}"; ValueType: string; ValueName: ""; ValueData: "{#MyAppAssocName}"; Flags: uninsdeletekey
+Root: HKCR; Subkey: "{#MyAppAssocKey}\DefaultIcon"; ValueType: string; ValueName: ""; ValueData: "C:\Windows\System32\imageres.dll,246"
+Root: HKCR; Subkey: "{#MyAppAssocKey}\shell\open\command"; ValueType: string; ValueName: ""; ValueData: """{app}\{#MyAppExeName}"" ""%1"""
+Root: HKCR; Subkey: "Applications\{#MyAppExeName}\SupportedTypes"; ValueType: string; ValueName: ".txt"; ValueData: ""
+
+[Icons]
+Name: "{autoprograms}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"
+Name: "{autodesktop}\{#MyAppName}"; Filename: "{app}\{#MyAppExeName}"; Tasks: desktopicon
+
+[Run]
+Filename: "{app}\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringChange(MyAppName, '&', '&&')}}"; Flags: nowait postinstall skipifsilent
+

Text Editor/Program.cs

@@ -12,11 +12,15 @@ static class Program
         /// The main entry point for the application.
         /// </summary>
         [STAThread]
-        static void Main()
+        static void Main(string[] args)
         {
             Application.EnableVisualStyles();
             Application.SetCompatibleTextRenderingDefault(false);
-            Application.Run(new Form1());
+            string fileName = null;
+
+            if (args != null && args.Length > 0)
+                fileName = args[0];
+            Application.Run(new Form1(fileName));
         }
     }
 }

Text Editor/Text Editor.csproj

@@ -107,5 +107,8 @@
   <ItemGroup>
     <None Include="Resources\icon-72.png" />
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Inno\" />
+  </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
 </Project>