Update Blazor templates to use TempData by dariatiurina · Pull Request #65752 · dotnet/aspnetcore

dariatiurina · 2026-03-12T08:31:16Z

Update Blazor templates to use TempData

Description

Updates the Blazor Identity project template to pass status messages between pages using [SupplyParameterFromTempData] instead of cookies. This replaces the custom cookie-based approach (Identity.StatusMessage cookie with a 5-second MaxAge) with the built-in TempData mechanism, which is simpler and follows standard ASP.NET Core patterns.

Changes

`IdentityRedirectManager.cs`

Removed the StatusCookieName constant, StatusCookieBuilder, and all cookie-writing logic
Added a StatusMessageKey constant ("Identity.StatusMessage") for the TempData entry key
Removed RedirectToWithStatus, RedirectToCurrentPageWithStatus, and RedirectToInvalidUser methods entirely — status message passing is now handled by the pages themselves via [SupplyParameterFromTempData]
Removed unused using directives (Microsoft.AspNetCore.Identity, BlazorWebCSharp._1.Data)

`StatusMessage.razor`

Simplified to a pure presentational component that accepts a [Parameter] string? Message
Removed the HttpContext cascading parameter, cookie reading logic, messageFromCookie field, and DisplayMessage computed property
The component no longer reads from cookies; it relies on the caller to pass the message explicitly

`InvalidUser.razor`

Now generates the error message locally using UserManager.GetUserId(HttpContext.User) instead of receiving it through a redirect from IdentityRedirectManager

Account pages (16 `.razor` files)

Added [SupplyParameterFromTempData(Name = IdentityRedirectManager.StatusMessageKey)] property to each page for reading and writing status messages via TempData
Each page reads IdentityStatusMessage during initialization and stores it in a local message field, then nulls it out (TempData is one-time-read)
Replaced RedirectManager.RedirectToWithStatus(url, message, HttpContext) calls with setting IdentityStatusMessage = message followed by RedirectManager.RedirectTo(url)
Replaced RedirectManager.RedirectToInvalidUser(UserManager, HttpContext) calls with RedirectManager.RedirectTo("Account/InvalidUser")
Pages that previously used parameterless <StatusMessage /> now pass the message explicitly: <StatusMessage Message="@message" />

Minor fix

Fixed a double-space typo in ExternalLogin.razor (<div class= → <div class=)
Fixed a bug in ConfirmEmailChange.razor where the error message string was not interpolated ('{userId}' → '{UserId}')

Copilot

Pull request overview

Updates the Blazor Identity template’s status-message flow to use ITempData instead of a short-lived custom cookie, aligning the template with the Razor Components TempData infrastructure.

Changes:

Replace cookie-based status message persistence with ITempData (IdentityRedirectManager + StatusMessage).
Update Identity account/manage pages to receive ITempData via cascading parameters and pass it into redirect helpers.
Adjust RedirectToInvalidUser to take an explicit ClaimsPrincipal plus ITempData.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/IdentityRedirectManager.cs	Switch redirect status storage from cookies to TempData and adjust redirect helper signatures.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Shared/StatusMessage.razor	Read status message from TempData instead of cookies.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/TwoFactorAuthentication.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/SetPassword.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/ResetAuthenticator.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/RenamePasskey.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/PersonalData.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Passkeys.razor	Add `ITempData` cascading parameter and pass it to redirect helpers (including updated error messaging).
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Index.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/GenerateRecoveryCodes.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/ExternalLogins.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/EnableAuthenticator.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Email.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Disable2fa.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/DeletePersonalData.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/ChangePassword.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/ExternalLogin.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/ConfirmEmailChange.razor	Add `ITempData` cascading parameter and pass it to redirect helpers.

…iurina/aspnetcore into tempdata-templates-update

ilonatommy · 2026-03-23T12:15:15Z

/azp run

azure-pipelines · 2026-03-23T12:15:32Z

Azure Pipelines successfully started running 3 pipeline(s).

javiercn

Looks good.

But I expect that in its final form this uses SupplyParameterFromTempData and we completely get rid of IdentityRedirectManager.cs and just inline what we need on the callsites.

Copilot

Pull request overview

This PR updates the Blazor Identity template status-message flow to use TempData-backed component parameters instead of a short-lived custom cookie, aligning the templates with built-in ASP.NET Core mechanisms for passing one-time messages across redirects.

Changes:

Removed the cookie-based status message implementation and replaced it with a TempData key (IdentityRedirectManager.StatusMessageKey).
Updated account/manage pages to read/write the status message via [SupplyParameterFromTempData], and pass the resolved value into <StatusMessage />.
Updated the InvalidUser page to render an error message directly (rather than relying on a redirect manager helper).

Reviewed changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Shared/StatusMessage.razor	Removes cookie fallback; component now only renders the provided `Message`.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/TwoFactorAuthentication.razor	Reads/writes status message via TempData and passes it to `StatusMessage`.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/SetPassword.razor	Uses TempData for post-redirect status message instead of redirect helper methods.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/ResetAuthenticator.razor	Uses TempData to carry the “authenticator reset” success message across redirect.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/RenamePasskey.razor	Uses TempData to send passkey rename outcomes back to the Passkeys page.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/PersonalData.razor	Reads status message from TempData and displays it via `StatusMessage`.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Passkeys.razor	Converts multiple redirect-with-status flows to TempData + redirect.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Index.razor	Uses TempData to show “profile updated” and other outcomes after redirect.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/GenerateRecoveryCodes.razor	Reads status from TempData for post-redirect display.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/ExternalLogins.razor	Converts external-login add/remove status messaging to TempData.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/EnableAuthenticator.razor	Uses TempData for setup/verification outcomes that redirect to other pages.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Email.razor	Reads status from TempData and displays it via `StatusMessage`.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Disable2fa.razor	Uses TempData to carry “2FA disabled” message across redirect.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/DeletePersonalData.razor	Reads status from TempData and displays it via `StatusMessage`.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/ChangePassword.razor	Uses TempData to carry success/failure messages across redirect.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Login.razor	Reads TempData status into the login error/status display.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/InvalidUser.razor	Displays the invalid-user error through `StatusMessage` with a computed message.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/ExternalLogin.razor	Converts external-login redirect errors to TempData + redirect; minor markup cleanup.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/ConfirmEmailChange.razor	Uses TempData for invalid-link redirect messaging; fixes an interpolated message.
src/ProjectTemplates/Web.ProjectTemplates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/IdentityRedirectManager.cs	Removes cookie/status redirect helpers and introduces the TempData key constant.

github-actions · 2026-04-24T08:36:59Z

Started backporting to release/11.0-preview4 (link to workflow run)

github-actions · 2026-04-24T08:37:25Z

@dariatiurina backporting to release/11.0-preview4 failed, the patch most likely resulted in conflicts. Please backport manually!

git am output

$ git am --3way --empty=keep --ignore-whitespace --keep-non-patch changes.patch

Applying: Fixed bug with the lazy loading
Using index info to reconstruct a base tree...
M	src/Components/Endpoints/src/TempData/TempData.cs
M	src/Components/Endpoints/test/TempData/TempDataTest.cs
M	src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataComponent.razor
Falling back to patching base and 3-way merge...
Auto-merging src/Components/Endpoints/test/TempData/TempDataTest.cs
CONFLICT (content): Merge conflict in src/Components/Endpoints/test/TempData/TempDataTest.cs
Auto-merging src/Components/test/testassets/Components.TestServer/RazorComponents/Pages/TempData/TempDataComponent.razor
error: Failed to merge in the changes.
hint: Use 'git am --show-current-patch=diff' to see the failed patch
hint: When you have resolved this problem, run "git am --continue".
hint: If you prefer to skip this patch, run "git am --skip" instead.
hint: To restore the original branch and stop patching, run "git am --abort".
hint: Disable this message with "git config set advice.mergeConflict false"
Patch failed at 0001 Fixed bug with the lazy loading
Error: The process '/usr/bin/git' failed with exit code 128

Link to workflow output

dariatiurina added 3 commits March 10, 2026 12:04

Fixed bug with the lazy loading

ccc8997

Fix nullable

f7aa7c3

Changed template to use TempData instead of custom cookies

85047cb

github-actions Bot added the area-blazor Includes: Blazor, Razor Components label Mar 12, 2026

Merge branch 'main' into tempdata-templates-update

9d65074

dariatiurina self-assigned this Mar 12, 2026

ilonatommy approved these changes Mar 13, 2026

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ilonatommy added this to the .NET 11 Planning milestone Mar 13, 2026

dariatiurina marked this pull request as ready for review March 13, 2026 15:45

Copilot AI review requested due to automatic review settings March 13, 2026 15:46

Copilot started reviewing on behalf of dariatiurina March 13, 2026 15:48 View session

ilonatommy reviewed Mar 13, 2026

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Comment thread ...tent/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/ChangePassword.razor Outdated

ilonatommy reviewed Mar 13, 2026

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Comment thread ...ates/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/ExternalLogin.razor Outdated

ilonatommy requested changes Mar 13, 2026

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ilonatommy reviewed Mar 13, 2026

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Comment thread ...es/content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/Manage/Passkeys.razor Outdated

Copilot AI reviewed Mar 13, 2026

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ilonatommy reviewed Mar 13, 2026

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Comment thread ...content/BlazorWeb-CSharp/BlazorWebCSharp.1/Components/Account/Pages/ConfirmEmailChange.razor Outdated

dariatiurina added 2 commits March 16, 2026 12:08

Feedback getting addressed

2985674

Merge branch 'tempdata-templates-update' of https://github.com/dariat…

b7b5fbe

…iurina/aspnetcore into tempdata-templates-update

dotnet-policy-service Bot added the pending-ci-rerun When assigned to a PR indicates that the CI checks should be rerun label Mar 23, 2026

ilonatommy approved these changes Mar 23, 2026

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ilonatommy removed the pending-ci-rerun When assigned to a PR indicates that the CI checks should be rerun label Mar 23, 2026

dotnet-policy-service Bot added the pending-ci-rerun When assigned to a PR indicates that the CI checks should be rerun label Mar 30, 2026

javiercn approved these changes Apr 18, 2026

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dariatiurina added 4 commits April 21, 2026 11:02

Merge branch 'main' into tempdata-templates-update

bf0f991

Change to usage of the SupplyParameterFromTempData

6dc811f

Fix InvalidUser page

28e5798

Fix

7cd3bd2

dariatiurina requested a review from Copilot April 22, 2026 08:49

Copilot started reviewing on behalf of dariatiurina April 22, 2026 08:49 View session

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Fix

ba68f23

dariatiurina removed the pending-ci-rerun When assigned to a PR indicates that the CI checks should be rerun label Apr 22, 2026

dariatiurina merged commit 1daad8e into dotnet:main Apr 22, 2026
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dotnet-policy-service Bot modified the milestones: .NET 11 Planning, 11.0-preview4 Apr 22, 2026

dotnet-maestro Bot mentioned this pull request Apr 24, 2026

[main] Source code updates from dotnet/aspnetcore dotnet/dotnet#6239

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wtgodbe modified the milestones: 11.0-preview4, 11.0-preview5 Apr 24, 2026

dariatiurina mentioned this pull request Apr 24, 2026

[release/11.0-preview4] Update Blazor templates to use TempData #66456

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wtgodbe pushed a commit that referenced this pull request Apr 24, 2026

Update Blazor templates to use TempData (#65752) (#66456)

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dotnet-maestro Bot mentioned this pull request Apr 25, 2026

[main] Source code updates from dotnet/aspnetcore dotnet/dotnet#6274

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dariatiurina commented Mar 12, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

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Update Blazor templates to use TempData

Description

Changes

IdentityRedirectManager.cs

StatusMessage.razor

InvalidUser.razor

Account pages (16 .razor files)

Minor fix

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ilonatommy commented Mar 23, 2026

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dariatiurina commented Mar 12, 2026 •

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`IdentityRedirectManager.cs`

`StatusMessage.razor`

`InvalidUser.razor`

Account pages (16 `.razor` files)