Move the download function into SourceRouter

Author: wongjiahau

MainDemo.Wpf/Helper/SourceRouter.cs

@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Net;
 using System.Text;
 using System.Threading.Tasks;
 using System.Xml;
@@ -10,7 +11,7 @@
 namespace MaterialDesignDemo.Helper {
     public class SourceRouter {
         private string _typeName;
-        private const bool GetFromLocalSource = true;
+        private const bool GetFromLocalSource = false;
         public SourceRouter(string typeName) {
             _typeName = typeName;
         }
@@ -29,8 +30,34 @@ public XmlDocument Local() {
         }
 
         public XmlDocument Remote() {
-            return new MaterialDesignInXamlToolkitGitHubFile(_typeName).GetXmlDocument();
+            string ownerName = "wongjiahau";
+            string branchName = "New-Demo-2";
+            string sourceCode = DownloadFile(
+                @"https://raw.githubusercontent.com/" +
+                    $"{ownerName}/" +
+                    "MaterialDesignInXamlToolkit/" +
+                    $"{branchName}/"+
+                    "MainDemo.Wpf/" +
+                    $"{_typeName}.xaml"
+                );
+            var xmlDoc = new XmlDocument();
+            xmlDoc.LoadXml(sourceCode);
+            return xmlDoc;
+        }
 
+        private static string DownloadFile(string sourceUrl) 
+        //Refered from : https://gist.github.com/nboubakr/7812375
+        {
+            
+            long existLen = 0;
+            var httpReq = (HttpWebRequest)WebRequest.Create(sourceUrl);
+            httpReq.AddRange((int)existLen);
+            var httpRes = (HttpWebResponse)httpReq.GetResponse();
+            var responseStream = httpRes.GetResponseStream();
+            if (responseStream == null) return "Fail to fetch file";
+            var streamReader = new StreamReader(responseStream);
+            return streamReader.ReadToEnd();
         }
+ 
     }
 }