manage conflict (generic way) use toast to show error (#588)

* manage conflict (generic way) use toast to show error

* fix httpservice after merge conflict, adapt to use new repository

src/BlazorAdmin/Shared/MainLayout.razor

@@ -3,6 +3,7 @@
 
 @inherits BlazorAdmin.Helpers.BlazorLayoutComponent
 
+
 <AuthorizeView Roles=@BlazorShared.Authorization.Constants.Roles.ADMINISTRATORS>
     <div class="sidebar">
         <NavMenu />
@@ -10,11 +11,13 @@
 </AuthorizeView>
 
 <div class="main">
+   
     <div class="top-row px-4">
         <a href="https://github.com/dotnet-architecture/eShopOnWeb" target="_blank" class="ml-md-auto">About eShopOnWeb</a>
     </div>
 
     <div class="content px-4">
+        <Toast></Toast>
         @Body
     </div>
 </div>

src/BlazorAdmin/Shared/Toast.razor

@@ -0,0 +1,13 @@
+@inherits BlazorAdmin.Helpers.ToastComponent
+
+@namespace BlazorAdmin.Shared
+
+<div class="toast @(IsVisible ? "toast-visible" : null) @BackgroundCssClass">
+    <div class="toast-icon">
+        <i class="fa fa-@IconCssClass" aria-hidden="true"></i>
+    </div>
+    <div class="toast-body">
+        <h5>@Heading</h5>
+        <p>@Message</p>
+    </div>
+</div>