C#•3mo ago

✅ wpf json CRUD(mvvm)

Could you tutorial how to use json config file ? I will do CRUD in the mvvm pattern through Json file.

42 Replies

Unknown User•3mo ago

Message Not Public

Imagine you have a User DTO (which represents the JSON of one of your endpoints)

public class UserDto
{
    public Guid Id {get;set;}
    public string Name {get;set;}
    public int Age {get;set;}
}

public class UserDto
{
    public Guid Id {get;set;}
    public string Name {get;set;}
    public int Age {get;set;}
}

And your API returns a list of Users for example... So you would be using HttpClient to communicate with your API via a service. As very barebone example imagine something like:

public class UserService
{
    private readonly HttpClient _httpClient;
    public UserService(HttpClient httpClient)
    {
        _httpClient = httpClient;
    }

    public async Task<List<UserDto>> GetUsers()
    {
        return await _httpClient.GetFromJsonAsync<UserDto>("your api endpoint");
    }
}

public class UserService
{
    private readonly HttpClient _httpClient;
    public UserService(HttpClient httpClient)
    {
        _httpClient = httpClient;
    }

    public async Task<List<UserDto>> GetUsers()
    {
        return await _httpClient.GetFromJsonAsync<UserDto>("your api endpoint");
    }
}

So in your mvvm you would have an instance of that service and u would call GetUsers to populate a ObservableCollection which would in turn populate your View. This is very barebone simplistic explanation just to give u an idea.

Unknown User•3mo ago

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leowest•3mo ago

I don't think its a file but could be

Unknown User•3mo ago

Message Not Public

leowest•3mo ago

could be poor wording and language barrier

Unknown User•3mo ago

Message Not Public

leowest•3mo ago

so I gave an example using an API and if that is not what he wants im sure he will say 😉 regardless from httpclient to readfile is very little changes

Unknown User•3mo ago

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jlim•3mo ago

Thanks your kindness reply, but I don't need Http client. Json file is located into my pc local I can't use DBMS like mysql, postgre. And factory's environment is can't use internet. So I wanna use configure file like json, xml.. And I wanna implemented CRUD in the json file. And yea' I think IOC is clear. If give me a guideline or solution then I will step up than before Thanks your kindness coding! But my intent is not using http

Unknown User•3mo ago

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jlim•3mo ago

I see Oh I found FileUserservice!, I try it thanks!

leowest•3mo ago

then I would suggest you use SQLite which is local and can be used with efcore

SleepWellPupper•3mo ago

SqLite uses a file also and provides more facilities suited to CRUD oh yeah me too slow

leowest•3mo ago

https://learn.microsoft.com/en-us/ef/core/get-started/overview/first-app?tabs=visual-studio

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✅ wpf json CRUD(mvvm)