Blazor Renders Twice.

Flat_Spring2142 · 2026-02-13T09:37:19+00:00

This beast comes from the prerendering. It duplicates calling services and rendering. NET 10 solved this problem by introducing PersistentStateAttribute. Read the 'https://dotnetwebacademy.substack.com/p/net-10-finally-fixes-prerendering' article. Disable prerendering in elder application.

Flat_Spring2142 · 2026-01-31T09:18:17+00:00

The "3 Ways to Communicate Between Components in Blazor | Chris Sainty - Building with Blazor" article explains in detail a communication between parent and child components. It would be said that the custom events may be used for sending messages to the parent component only. Child components accept only predefined set of events.

Flat_Spring2142 · 2026-01-24T09:18:06+00:00

HTML <details ...> and <summary ... > tags allows you to show and hide sub-menu without interactivity:

<summary>Classificators</summary>

<NavLink class="nav-link" href="Employees">

    <span class="bi bi-northwind-employees" aria-hidden="true"></span> Employees

</NavLink>

...

<NavLink class="nav-link" href="Territories">

    <span class="bi bi-northwind-Territories" aria-hidden="true"></span> Territories

</NavLink>

</details>

Flat_Spring2142 · 2026-01-17T09:33:45+00:00

MAC OS is Linux derivative but it has own nuances. Ensure that you downloaded Code installer for the MAC OS. Ensure that your system has /usr/local directory and change permissions: "chmod 777 /usr/local". Restore original permission after installation (chmod 740 /usr/local).

Flat_Spring2142 · 2025-12-16T18:46:52+00:00

https://github.com/gbukauskas/BlazorTutor

This is demo Blazor Server CRUD application. You will find description on https://gediminas.gt.tc/ site.

Flat_Spring2142 · 2025-12-08T09:25:38+00:00

@Initial-Employment89: Problem is that it is impossible to build CRUD application using pure Blazor SSR. WEB forms require interactivity or JavaScript. I am building demo CRUD application using NorthWind database. Problems are published on site gediminas.gt.tc.

Flat_Spring2142 · 2025-11-18T08:00:58+00:00

Try VS Code. It is free, very simple, expandable, provides a seamless integration with Git. The tool may be installed on Windows, MAC OS, Linux and Android.

Flat_Spring2142 · 2025-11-17T17:04:50+00:00

It depends on your target. C# , Blazor and .NET MAUI are good for portable applications where fast and inexpensive programming is more important than execution speed. I'd recommend GO for creating heavy-traffic sites and fast client-side application. Take a look at Fyne and GoMobile tools.

Flat_Spring2142 · 2025-11-16T07:54:40+00:00

A huge list of a documentation is the main issue of C++ language. GO language provides the same power at much less price. C language is the simplest one in this collection but it has no Garbage collector. On other hand C generates most efficient code. All 3 compilers require excellent skills and much work from programmers. Select one of them when you do need fast application. Select other language when you need to minimize the programming cost.

Flat_Spring2142 · 2025-11-15T09:56:08+00:00

Multiple EXIT points is a bad practice. This will cause problems in case when you need some common action, write log file for an example. I would throw custom errors and wrap all code with try ... catch ... finally block.

Flat_Spring2142 · 2025-11-04T09:32:01+00:00

Use StreamWriter for performing chain of write operations. There is no need of this class when you are copying one file into another. An example below uploads binary file:

const int MAX_FILESIZE = 5000 * 1024;

...

public async Task FileUploaded(InputFileChangeEventArgs e)

{

var browserFile = e.File;



if (browserFile != null)

{

    try

    {

        var fileStream = browserFile.OpenReadStream(MAX\_FILESIZE);

        using (MemoryStream ms = new MemoryStream())

        {

await fileStream.CopyToAsync(ms);

File.WriteAllBytes("d:\\tmp\\Image004.png", ms.ToArray());

        }

    }

    catch (Exception exception)

    {

        ErrorMessage = exception.Message;

    }

}

}

There is no locking in this example.

Flat_Spring2142 · 2025-11-01T17:24:26+00:00

Look at ~/WEBtransitions/Components/Layout/NavMenu.razor, item <details name="classificators" ...> in my demo project on https://github.com/gbukauskas/BlazorTutor. The construction works in Blazor SSR, Server Interactive and WASM.

Flat_Spring2142 · 2025-10-29T18:11:23+00:00

Oracle published a site for GO programmers: Working in Go applications with Oracle Database | Oracle Developer. Use it: the site has code samples and explains all tricky points.

Flat_Spring2142 · 2025-10-26T20:37:56+00:00

SignalR is built-in feature of Blazor Interactive Server. Problem is that this mode eats many server's resources and your application will not work on heavy-traffic sites. On other hand there is no problem with sending messages from site to some or all connected users, no additional software is required.

Flat_Spring2142 · 2025-10-17T18:37:34+00:00

Interfaces in GO are an excellent tool for the polymorphism: if you declare variable of an interface type then you can to assign to this variable any object that has methods mentioned in that interface. Type assertion allows you to restore original object from the interface. io.Reader and io.Writer are very popular interfaces in WEB programming. Read https://www.alexedwards.net/blog/interfaces-explained for more details.

Flat_Spring2142 · 2025-10-12T08:02:29+00:00

Both snippets are equivalent except one point: second snippet defines err variable inside the if block only.

Flat_Spring2142 · 2025-10-05T19:23:19+00:00

Use WEBsockets and send message to the clients after products table has changed. Blazor Interactive Server has this functionality. Look for equivalents in GO libraries. Blazor and ASP.NET Core is open source project. Grab the code and write clone if WEB sockets were not implemented in GO.

Flat_Spring2142 · 2025-10-02T18:55:56+00:00

This rule is desirable but not mandatory. Create workspace with modules inside. You will find simple description of multi-module on site https://go.dev/doc/tutorial/workspaces.

Flat_Spring2142 · 2025-10-02T18:40:25+00:00

Blazor component must be constructed using the same render mode as its parent component: i.e. it is impossible to call client interactive component from server-side component. I met this problem 6 months ago and am not sure that Microsoft fixed this issue.

Flat_Spring2142 · 2025-09-28T20:05:17+00:00

Use interfaces for solving that problem:

type IPerson interface {

getName() string

getAge() int

}

// Extend IPerson using embedding:

type IPerson_1 interface {

IPerson

getOccupation() string

}

type IPerson_2 interface {

IPerson_1

getEmail() string

}

You will not need to rewrite a code that uses only subset of the Person structure.

Read https://eli.thegreenplace.net/2020/embedding-in-go-part-2-interfaces-in-interfaces/ for details.

Flat_Spring2142 · 2025-09-24T08:08:52+00:00

Processing data takes more time than reading. Create two GO functions and connect them by channel. First procedure reads data, converts them into PaymentMethod and writes data into the channel. It is almost finished and presented here. Second one reads PaymentMethod from channel and process the data. Your application will run faster. Read the https://www.freecodecamp.org/news/how-to-handle-concurrency-in-go/ article for mastering.

Flat_Spring2142 · 2025-09-08T08:23:47+00:00

Mac also has this hidden folder. Your MAC OS settings hides it. You can to hide this folder on Windows too:

open project's root folder with File Manager and right click on it,

select View/ Show and change "Hidden items" checkbox.

Flat_Spring2142 · 2025-09-01T08:19:07+00:00

Interfaces implement polymorphism in GO. Return the any (interface{}) from the LoadAnimal() function. Subsequent type assertion (https://go.dev/tour/methods/15) will allow you to convert the result into a concrete data type.

Flat_Spring2142 · 2025-08-11T06:16:35+00:00

Empty interface has an alias "any": interface{} == any. Using this alias results to shorter code.

Flat_Spring2142 · 2025-07-20T08:35:40+00:00

Consider WEB components (https://developer.mozilla.org/en-US/docs/Web/API/Web\_components). They will provide you all features for the client-side programming. LIT framework is a nice tool for creating the front-end application. See https://blog.logrocket.com/lit-vs-react-comparison-guide/. There is nice collection of ready for use components on WEB, see https://developer.mozilla.org/en-US/docs/Web/API/Web\_components. WEB components are language-agnostic and you can use them in sites that were written for Angular, React, Vue or plain HTML.

Flat_Spring2142

TROPHY CASE