Saving last Release Stream in Registry

EZPPClient Installer/EZPPClient Installer.csproj

@@ -94,6 +94,7 @@
     <Compile Include="Utils\DownloadUtil.cs" />
     <Compile Include="Utils\MD5Util.cs" />
     <Compile Include="Utils\ProcessUtil.cs" />
+    <Compile Include="Utils\RegistryUtil.cs" />
     <Compile Include="Utils\ReleaseStreamUtil.cs" />
     <Compile Include="Objects\Shortcut.cs" />
     <Compile Include="Objects\UpdateState.cs" />

EZPPClient Installer/MainWindow.xaml.cs

@@ -15,6 +15,10 @@ using System.Media;
 using System.Runtime.InteropServices.ComTypes;
 using Shortcut;
 using Path = System.Windows.Shapes.Path;
+using EZPPClient_Installer.Utils;
+using Microsoft.Win32;
+using System.Windows.Controls;
+using System.Threading;
 
 #if DEBUG
 using MessageBox = System.Windows.MessageBox;
@@ -114,9 +118,15 @@ namespace EZPPClient_Installer
       List<string> releases = await ReleaseStreamUtil.GetAvailableReleaseStreams();
       foreach(string release in releases)
       {
-        ReleaseStreamComboBox.Items.Add(release.UppercaseFirst());
+        ReleaseStreamComboBox.Items.Add(release.UppercaseFirst().Trim());
       }
-      ReleaseStreamComboBox.SelectedIndex = 0;
+
+      string systemRelease = RegistryUtil.GetUsedReleaseStream("Stable");
+
+      bool containsRelease = releases.Contains(systemRelease);
+
+      ReleaseStreamComboBox.SelectedValue = systemRelease;
+     
     }
 
     private async Task<UpdateState> CheckForInstallerUpdates()
@@ -127,7 +137,7 @@ namespace EZPPClient_Installer
         using (WebClient client = new WebClient())
         {
           client.Headers.Add("user-agent", "EZPPClientInstaller");
-          string newVersionString = client.DownloadString("https://new.ez-pp.farm/ezppclient?version");
+          string newVersionString = await client.DownloadStringTaskAsync("https://new.ez-pp.farm/ezppclient?version");
           double ver = 0;
           try
           {
@@ -202,6 +212,10 @@ namespace EZPPClient_Installer
         return;
       }
 
+      var type = InstallButton.Content;
+
+      RegistryUtil.SetUsedReleaseStream(RELEASESTREAM);
+
       if (!Directory.Exists(osuFolder + "\\EZPPClient"))
       {
         Directory.CreateDirectory(osuFolder + "\\EZPPClient");
@@ -403,7 +417,7 @@ namespace EZPPClient_Installer
 
       await DownloadUtil.DownloadFiles(filesToDownload, EZPPFolder);
 
-      if (InstallButton.Content.Equals("Install"))
+      if (type.Equals("Install"))
       {
         IShellLink link = (IShellLink)new ShellLink();
 
@@ -440,7 +454,7 @@ namespace EZPPClient_Installer
         linkFoldersCheckbox.IsEnabled = false;
         string updateText = "It seems like the installation was faulty, please hit Update to repair the EZPPClient.";
 
-        switch (InstallButton.Content)
+        switch (type)
         {
           case "Update":
             updateText = "It seems like the update was faulty, please hit Update to repair the EZPPClient.";
@@ -463,7 +477,7 @@ namespace EZPPClient_Installer
       {
         string updateText = "The EZPPClient was successfully installed!";
 
-        switch (InstallButton.Content)
+        switch (type)
         {
           case "Update":
             updateText = "The EZPPClient was successfully updated!";

EZPPClient Installer/Utils/RegistryUtil.cs

@@ -0,0 +1,41 @@
+using Microsoft.Win32;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EZPPClient_Installer.Utils
+{
+  class RegistryUtil
+  {
+
+    public static void SetUsedReleaseStream(string release)
+    {
+      RegistryKey key = Registry.CurrentUser.CreateSubKey(@"SOFTWARE\EZPPClientInstaller");
+      key.SetValue("ReleaseStream", release);
+      key.Close();
+    }
+
+    public static String GetUsedReleaseStream(string defaultRelease)
+    {
+      string release = defaultRelease;
+      RegistryKey key = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\EZPPClientInstaller");
+
+      //if it does exist, retrieve the stored values  
+      if (key != null)
+      {
+        release = (string) key.GetValue("ReleaseStream");
+        key.Close();
+      }
+
+      return release;
+    }
+
+    public static void DeleteUsedReleaseStream()
+    {
+      Registry.CurrentUser.DeleteSubKey(@"SOFTWARE\EZPPClientInstaller");
+    }
+
+  }
+}