Links
dotnet CLI
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# check the dotnet CLI is well using the .NET Core 5.0
dotnet --info
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Update the target framework
MyProject.csproj
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<Project Sdk="Microsoft.NET.Sdk.Web">
<PropertyGroup>
<!--<TargetFramework>netcoreapp3.1</TargetFramework>-->
<TargetFramework>net5.0</TargetFramework>
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Launch task
.vscode/launch.json
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// "program": "${workspaceFolder}/MyApp/bin/Debug/netcoreapp3.1/MyApp.dll",
"program": "${workspaceFolder}/MyApp/bin/Debug/net5.0/MyApp.dll",
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Update package reference versions
Update each Microsoft.AspNetCore.* Microsoft.EntityFrameworkCore.* Microsoft.Extensions.* System.Net.Http.Json package reference's version attribute to 5.0.0 or later.
MyProject.csproj
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<Project Sdk="Microsoft.NET.Sdk.Web">
<ItemGroup>
<!--<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.6">-->
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="5.0.0">
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Include a new namespaces
_Imports.razor
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@using System.Net.Http
@using Microsoft.AspNetCore.Authorization
@using Microsoft.AspNetCore.Components.Authorization
@using Microsoft.AspNetCore.Components.Forms
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.Web
@using Microsoft.AspNetCore.Components.Web.Virtualization
@using Microsoft.JSInterop
@using {AssemblyName}
@using {AssemblyName}.Shared
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MainLayout
Surround the component's HTML markup with a <div> element that has a class attribute set to page.
Shared/MainLayout.razor
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<div class="page">
@* ... *@
</div>
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CSS
Add link to AssemblyName.styles.css
Pages/_Host.cshtml
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<link href="{AssemblyName}.styles.css" rel="stylesheet" />
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Add new CSS files
Shared/MainLayout.razor.css
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.page {
position: relative;
display: flex;
flex-direction: column;
}
.main {
flex: 1;
}
.sidebar {
background-image: linear-gradient(180deg, rgb(5, 39, 103) 0%, #3a0647 70%);
}
.top-row {
background-color: #f7f7f7;
border-bottom: 1px solid #d6d5d5;
justify-content: flex-end;
height: 3.5rem;
display: flex;
align-items: center;
}
.top-row ::deep a, .top-row .btn-link {
white-space: nowrap;
margin-left: 1.5rem;
}
.top-row a:first-child {
overflow: hidden;
text-overflow: ellipsis;
}
@media (max-width: 767.98px) {
.top-row:not(.auth) {
display: none;
}
.top-row.auth {
justify-content: space-between;
}
.top-row a, .top-row .btn-link {
margin-left: 0;
}
}
@media (min-width: 768px) {
.page {
flex-direction: row;
}
.sidebar {
width: 250px;
height: 100vh;
position: sticky;
top: 0;
}
.top-row {
position: sticky;
top: 0;
z-index: 1;
}
.main > div {
padding-left: 2rem !important;
padding-right: 1.5rem !important;
}
}
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Shared/NavMenu.razor.css
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.navbar-toggler {
background-color: rgba(255, 255, 255, 0.1);
}
.top-row {
height: 3.5rem;
background-color: rgba(0,0,0,0.4);
}
.navbar-brand {
font-size: 1.1rem;
}
.oi {
width: 2rem;
font-size: 1.1rem;
vertical-align: text-top;
top: -2px;
}
.nav-item {
font-size: 0.9rem;
padding-bottom: 0.5rem;
}
.nav-item:first-of-type {
padding-top: 1rem;
}
.nav-item:last-of-type {
padding-bottom: 1rem;
}
.nav-item ::deep a {
color: #d7d7d7;
border-radius: 4px;
height: 3rem;
display: flex;
align-items: center;
line-height: 3rem;
}
.nav-item ::deep a.active {
background-color: rgba(255,255,255,0.25);
color: white;
}
.nav-item ::deep a:hover {
background-color: rgba(255,255,255,0.1);
color: white;
}
@media (min-width: 768px) {
.navbar-toggler {
display: none;
}
.collapse {
/* Never collapse the sidebar for wide screens */
display: block;
}
}.navbar-toggler {
background-color: rgba(255, 255, 255, 0.1);
}
.top-row {
height: 3.5rem;
background-color: rgba(0,0,0,0.4);
}
.navbar-brand {
font-size: 1.1rem;
}
.oi {
width: 2rem;
font-size: 1.1rem;
vertical-align: text-top;
top: -2px;
}
.nav-item {
font-size: 0.9rem;
padding-bottom: 0.5rem;
}
.nav-item:first-of-type {
padding-top: 1rem;
}
.nav-item:last-of-type {
padding-bottom: 1rem;
}
.nav-item ::deep a {
color: #d7d7d7;
border-radius: 4px;
height: 3rem;
display: flex;
align-items: center;
line-height: 3rem;
}
.nav-item ::deep a.active {
background-color: rgba(255,255,255,0.25);
color: white;
}
.nav-item ::deep a:hover {
background-color: rgba(255,255,255,0.1);
color: white;
}
@media (min-width: 768px) {
.navbar-toggler {
display: none;
}
.collapse {
/* Never collapse the sidebar for wide screens */
display: block;
}
}
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wwwroot/css/site.css
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@import url('open-iconic/font/css/open-iconic-bootstrap.min.css');
html, body {
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
a, .btn-link {
color: #0366d6;
}
.btn-primary {
color: #fff;
background-color: #1b6ec2;
border-color: #1861ac;
}
.content {
padding-top: 1.1rem;
}
.valid.modified:not([type=checkbox]) {
outline: 1px solid #26b050;
}
.invalid {
outline: 1px solid red;
}
.validation-message {
color: red;
}
#blazor-error-ui {
background: lightyellow;
bottom: 0;
box-shadow: 0 -1px 2px rgba(0, 0, 0, 0.2);
display: none;
left: 0;
padding: 0.6rem 1.25rem 0.7rem 1.25rem;
position: fixed;
width: 100%;
z-index: 1000;
}
#blazor-error-ui .dismiss {
cursor: pointer;
position: absolute;
right: 0.75rem;
top: 0.5rem;
}
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Clean
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# delete the bin and obj folders
dotnet clean
# clear the NuGet package cache
dotnet nuget locals --clear all
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Errors
The framework 'Microsoft.AspNetCore.App', version '3.1.0' was not found
It was not possible to find any compatible framework version
The framework 'Microsoft.AspNetCore.App', version '3.1.0' was not found.
- The following frameworks were found:
5.0.6 at [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
You can resolve the problem by installing the specified framework and/or SDK.
The specified framework can be found at:
- https://aka.ms/dotnet-core-applaunch?framework=Microsoft.AspNetCore.App&framework_version=3.1.0&arch=x64&rid=arch-x64
The target process exited without raising a CoreCLR started event. Ensure that the target process is configured to use .NET Core. This may be expected if the target process did not run on .NET Core.
The program '[15328] Booky.WebApi.dll' has exited with code 150 (0x96).
Solution: edit the .vscode/launch.json file and replace the netcoreapp3.1 by net5.0
- ensure to upgrade all the nuget packages so they all target .NET 5
- clean the nuget packages cache and the projects
The DiscoverDefaultScopedCssItems task could not be loaded from the assembly net46/Microsoft.NET.Sdk.Razor.Tasks.dll
The "Microsoft.AspNetCore.Razor.Tasks.DiscoverDefaultScopedCssItems" task could not be loaded from the assembly /usr/share/dotnet/sdk/5.0.203/Sdks/Microsoft.NET.Sdk.Razor/build/netstandard2.0/../../tasks/net46/Microsoft.NET.Sdk.Razor.Tasks.dll. Invalid Image Confirm that the <UsingTask> declaration is correct, that the assembly and all its dependencies are available, and that the task contains a public class that implements Microsoft.Build.Framework.ITask.
Solution: download the missing net46 directory to /usr/share/dotnet/sdk/5.0.203/Sdks/Microsoft.NET.Sdk.Razor/tasks.
error NU3028: Package 'Microsoft.AspNetCore.App.Ref 5.0.0' from source 'https://api.nuget.org/v3/index.json':
The author primary signature's timestamp found a chain building issue: UntrustedRoot: self signed certificate in certificate chain
error NU3037: Package 'Microsoft.AspNetCore.App.Ref 5.0.0' from source 'https://api.nuget.org/v3/index.json':
The author primary signature validity period has expired.
Archlinux:
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# downgrade ca-certificates-mozilla from 3.63 to 3.62
sudo pacman -U /var/cache/pacman/pkg/ca-certificates-mozilla-3.62-1-x86_64.pkg.tar.zst
# copy the VeriSign_Universal_Root_Certification_Authority certificate
sudo cp /etc/ssl/certs/VeriSign_Universal_Root_Certification_Authority.pem /etc/ca-certificates/trust-source/anchors/
# install the latest version of ca-certificates-mozilla
# refresh the nuget cache
dotnet restore --no-cache --force
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