use htmlhelpter in cshtml

src/Microsoft.ApplicationInsights.AspNet/ApplicationInsightsJavaScript.cs

@@ -1,8 +1,10 @@
 
-namespace Microsoft.ApplicationInsights.AspNet.JavaScript
+namespace Microsoft.ApplicationInsights.AspNet
 {
     using System;
     using Microsoft.ApplicationInsights.Extensibility;
+    using Microsoft.AspNet.Mvc.Rendering;
+
 
     /// <summary>
     /// This class helps to inject Application Insights JavaScript snippet into applicaiton code.
@@ -13,7 +15,7 @@ namespace Microsoft.ApplicationInsights.AspNet.JavaScript
     ///         @Html.Raw(ApplicationInsightsJavaScript.Write())
     ///     &lt;/head&gt;
     /// </summary>
-    public class ApplicationInsightsJavaScript : IJavaScriptSnippet
+    public class JavaScriptSnippet
     {
         /// <summary>
         /// Prefix of the code snippet. Use it if you need to initialize additional properties in javascript configuration.
@@ -41,7 +43,7 @@ namespace Microsoft.ApplicationInsights.AspNet.JavaScript
 
         private TelemetryConfiguration telemetryConfiguration;
 
-        public ApplicationInsightsJavaScript(TelemetryConfiguration telemetryConfiguration)
+        public JavaScriptSnippet(TelemetryConfiguration telemetryConfiguration)
         {
             this.telemetryConfiguration = telemetryConfiguration;
         }
@@ -50,17 +52,20 @@ namespace Microsoft.ApplicationInsights.AspNet.JavaScript
         /// Returns code snippet with instrumentation key initialized from TelemetryConfiguration.
         /// </summary>
         /// <returns>JavaScript code snippet with instrumentation key or empty if instrumentation key was not set for the applicaiton.</returns>
-        public string Write()
+        public string FullScript
         {
-            if (!string.IsNullOrEmpty(this.telemetryConfiguration.InstrumentationKey))
+            get
             {
-                return ScriptPrefix + @"{
+                if (!string.IsNullOrEmpty(this.telemetryConfiguration.InstrumentationKey))
+                {
+                    return ScriptPrefix + @"{
   instrumentationKey: '" + this.telemetryConfiguration.InstrumentationKey + @"'
 }" + ScriptPostfix;
-            }
-            else
-            {
-                return string.Empty;
+                }
+                else
+                {
+                    return string.Empty;
+                }
             }
         }
     }

src/Microsoft.ApplicationInsights.AspNet/Extensions/ApplicationInsightsExtensions.cs

@@ -6,7 +6,6 @@
     using Microsoft.ApplicationInsights;
     using Microsoft.ApplicationInsights.AspNet;
     using Microsoft.ApplicationInsights.AspNet.ContextInitializers;
-    using Microsoft.ApplicationInsights.AspNet.JavaScript;
     using Microsoft.ApplicationInsights.AspNet.TelemetryInitializers;
     using Microsoft.ApplicationInsights.Channel;
     using Microsoft.ApplicationInsights.DataContracts;
@@ -55,8 +54,6 @@
                 return telemetryConfiguration;
             });
 
-            services.AddSingleton<IJavaScriptSnippet, ApplicationInsightsJavaScript>();
-
             services.AddScoped<TelemetryClient>();
 
             services.AddScoped<RequestTelemetry>((svcs) => {

src/Microsoft.ApplicationInsights.AspNet/Extensions/ApplicationInsightsJavaScriptExtensions.cs

@@ -0,0 +1,20 @@
+namespace Microsoft.AspNet.Mvc.Rendering
+{
+    using Microsoft.ApplicationInsights.AspNet;
+    using Microsoft.ApplicationInsights.Extensibility;
+
+    public static class ApplicationInsightsJavaScriptExtensions
+    {
+        /// <summary>
+        /// Extension method to inject Application Insights JavaScript snippet into cshml files. 
+        /// </summary>
+        /// <param name="helper">Html helper object to align with razor code style.</param>
+        /// <param name="configuration">Telemetry configuraiton to initialize snippet.</param>
+        /// <returns>JavaScript snippt to insert into html page.</returns>
+        public static HtmlString ApplicationInsightsJavaScript(this IHtmlHelper helper, TelemetryConfiguration configuration)
+        {
+            JavaScriptSnippet snippet = new JavaScriptSnippet(configuration);
+            return new HtmlString(snippet.FullScript);
+        }
+    }
+}

src/Microsoft.ApplicationInsights.AspNet/JavaScript/IApplicationInsightsJavaScript.cs

@@ -1,8 +0,0 @@
-
-namespace Microsoft.ApplicationInsights.AspNet.JavaScript
-{
-    public interface IJavaScriptSnippet
-    {
-        string Write();
-    }
-}

test/Microsoft.ApplicationInsights.AspNet.Tests/JavaScript/ApplicationInsightsJavaScriptTest.cs

@@ -1,6 +1,6 @@
 namespace Microsoft.Framework.DependencyInjection
 {
-    using Microsoft.ApplicationInsights.AspNet.JavaScript;
+    using Microsoft.ApplicationInsights.AspNet;
     using Microsoft.ApplicationInsights.Extensibility;
     using Xunit;
 
@@ -10,16 +10,16 @@
         public static void SnippetWillBeEmptyWhenInstrumentationKeyIsNotDefined()
         {
             var telemetryConfigurationWithNullKey = new TelemetryConfiguration();
-            var snippet = new ApplicationInsightsJavaScript(telemetryConfigurationWithNullKey);
-            Assert.Equal(string.Empty, snippet.Write());
+            var snippet = new JavaScriptSnippet(telemetryConfigurationWithNullKey);
+            Assert.Equal(string.Empty, snippet.FullScript.ToString());
         }
 
         [Fact]
         public static void SnippetWillBeEmptyWhenInstrumentationKeyIsEmpty()
         {
             var telemetryConfigurationWithEmptyKey = new TelemetryConfiguration { InstrumentationKey = string.Empty };
-            var snippet = new ApplicationInsightsJavaScript(telemetryConfigurationWithEmptyKey);
-            Assert.Equal(string.Empty, snippet.Write());
+            var snippet = new JavaScriptSnippet(telemetryConfigurationWithEmptyKey);
+            Assert.Equal(string.Empty, snippet.FullScript.ToString());
         }
 
 
@@ -28,8 +28,8 @@
         {
             string unittestkey = "unittestkey";
             var telemetryConfiguration = new TelemetryConfiguration { InstrumentationKey = unittestkey };
-            var snippet = new ApplicationInsightsJavaScript(telemetryConfiguration);
-            Assert.Contains("'" + unittestkey + "'", snippet.Write());
+            var snippet = new JavaScriptSnippet(telemetryConfiguration);
+            Assert.Contains("'" + unittestkey + "'", snippet.FullScript.ToString());
         }
     }
 }

test/Mvc6Framework45.FunctionalTests/Views/Shared/_Layout.cshtml

@@ -1,5 +1,5 @@
 @inject IOptions<AppSettings> AppSettings
-@inject Microsoft.ApplicationInsights.AspNet.JavaScript.IJavaScriptSnippet ApplicationInsightsJavaScript
+@inject Microsoft.ApplicationInsights.Extensibility.TelemetryConfiguration TelemetryConfiguration
 <!DOCTYPE html>
 <html>
     <head>
@@ -21,7 +21,7 @@
                   asp-fallback-test-class="carousel-caption" asp-fallback-test-property="display" asp-fallback-test-value="none" />
             <link rel="stylesheet" href="~/css/site.css" />
         </environment>
-        @Html.Raw(ApplicationInsightsJavaScript.Write()) 
+        @Html.ApplicationInsightsJavaScript(TelemetryConfiguration)
     </head>
     <body>
         <div class="navbar navbar-inverse navbar-fixed-top">