refactor(PopConfirmButton): add OnConfirm null check (dotnetcore#5898)

* refactor: 增加空检查

* chore: bump version 9.5.11-beta07

Co-Authored-By: lyt <wdmb123@outlook.com>

---------

Co-authored-by: lyt <wdmb123@outlook.com>

Author: ArgoZhang

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>9.5.11-beta06</Version>
+    <Version>9.5.11-beta07</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/BootstrapBlazor/Components/Button/PopConfirmButton.razor.cs

@@ -99,7 +99,11 @@ private async Task OnClickConfirm()
             IsDisabled = true;
             IsAsyncLoading = true;
             StateHasChanged();
-            await OnConfirm();
+
+            if (OnConfirm != null)
+            {
+                await OnConfirm();
+            }
 
             if (ButtonType == ButtonType.Submit)
             {