Add catch when failed to create Blob and Blob view.

Author: Frank Li (Wicresoft North America Ltd)

3-WebApp-multi-APIs/Controllers/HomeController.cs

@@ -91,7 +91,14 @@ private static async Task<string> CreateBlob(TokenAcquisitionTokenCredential tok
 
             using (MemoryStream stream = new MemoryStream(byteArray))
             {
-                await blobClient.UploadAsync(stream);
+                try
+                {
+                    await blobClient.UploadAsync(stream);
+                }
+                catch (Exception e)
+                {
+                    return ($"Blob failed to create. Exception: {e.Message}");
+                }
             }
             return "Blob successfully created";
         }

3-WebApp-multi-APIs/TokenAcquisitionTokenCredential.cs

@@ -8,7 +8,7 @@ namespace WebApp_OpenIDConnect_DotNet
 {
     public class TokenAcquisitionTokenCredential : TokenCredential
     {
-        private ITokenAcquisition _tokenAcquisition;
+        readonly private ITokenAcquisition _tokenAcquisition;
 
         /// <summary>
         /// Constructor from an ITokenAcquisition service.

3-WebApp-multi-APIs/Views/Home/Blob.cshtml

@@ -0,0 +1,7 @@
+@{
+    ViewData["Title"] = "Blob";
+}
+
+<h2>@ViewData["Title"]</h2>
+<h3>@ViewData["Message"]</h3>
+