From d4ee43fd1cf3a9fb79c9f07275e29995b2196018 Mon Sep 17 00:00:00 2001
From: Chris Sainty <chrissainty@users.noreply.github.com>
Date: Fri, 8 May 2020 12:25:41 +0100
Subject: [PATCH] Added ability to remove toasts on navigation

---
 samples/BlazorServer/Shared/NavMenu.razor  | 12 ++++++------
 src/Blazored.Toast/BlazoredToasts.razor.cs | 15 +++++++++++++++
 2 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/samples/BlazorServer/Shared/NavMenu.razor b/samples/BlazorServer/Shared/NavMenu.razor
index ae4a65c..b2d7a10 100644
--- a/samples/BlazorServer/Shared/NavMenu.razor
+++ b/samples/BlazorServer/Shared/NavMenu.razor
@@ -6,12 +6,12 @@
 </div>
 
 <div class="@NavMenuCssClass" @onclick="@ToggleNavMenu">
-    <ul class="nav flex-column">
-        <li class="nav-item px-3">
-            <NavLink class="nav-link" href="" Match="NavLinkMatch.All">
-                <span class="oi oi-home" aria-hidden="true"></span> Home
-            </NavLink>
-        </li>
+    <ul class="nav flex-column">
+        <li class="nav-item px-3">
+            <NavLink class="nav-link" href="" Match="NavLinkMatch.All">
+                <span class="oi oi-home" aria-hidden="true"></span> Home
+            </NavLink>
+        </li>
     </ul>
 </div>
 
diff --git a/src/Blazored.Toast/BlazoredToasts.razor.cs b/src/Blazored.Toast/BlazoredToasts.razor.cs
index 51da04c..5d76c13 100644
--- a/src/Blazored.Toast/BlazoredToasts.razor.cs
+++ b/src/Blazored.Toast/BlazoredToasts.razor.cs
@@ -27,6 +27,7 @@ public partial class BlazoredToasts
         [Parameter] public string ErrorIcon { get; set; }
         [Parameter] public ToastPosition Position { get; set; } = ToastPosition.TopRight;
         [Parameter] public int Timeout { get; set; } = 5;
+        [Parameter] public bool RemoveToastsOnNavigation { get; set; }
 
         private string PositionClass { get; set; } = string.Empty;
         internal List<ToastInstance> ToastList { get; set; } = new List<ToastInstance>();
@@ -35,6 +36,11 @@ protected override void OnInitialized()
         {
             ToastService.OnShow += ShowToast;
 
+            if (RemoveToastsOnNavigation)
+            {
+                NavigationManager.LocationChanged += ClearToasts;
+            }
+
             PositionClass = $"position-{Position.ToString().ToLower()}";
 
             if ((   !string.IsNullOrEmpty(InfoIcon)
@@ -57,6 +63,15 @@ public void RemoveToast(Guid toastId)
             });
         }
 
+        private void ClearToasts(object sender, LocationChangedEventArgs args)
+        {
+            InvokeAsync(() =>
+            {
+                ToastList.Clear();
+                StateHasChanged();
+            });
+        }
+
         private ToastSettings BuildToastSettings(ToastLevel level, RenderFragment message, string heading)
         {
             switch (level)