在ASP.NET Blazor中读取静态文件 [英] Reading static files in ASP.NET Blazor

问题描述

我有一个客户端Blazor应用程序.我想要一个用于客户端配置的 appsetting.json 文件，就像我们在其中的 environment.ts 角度的.

为此，我在 wwwroot 下保留了一个 ConfigFiles 文件夹，并在其中包含一个JSON文件.我正在尝试按以下方式读取此文件.

首先获取路径:

 公共静态类ConfigFiles{公共静态字符串GetPath(string fileName){返回Path.Combine("ConfigFiles"，fileName);}} 

比看它:

 公共字符串GetBaseUrl(){字符串T = string.Empty;尝试{T = File.ReadAllText(ConfigFiles.GetPath("appsettings.json"));}抓住(前例外){T = ex.Message;}返回T;} 

但我总是会收到错误消息:

找不到路径"/ConfigFiles/appsettings.json"的一部分.

在 GetPath()方法中，我也尝试过:

 返回Path.Combine("wwwroot/ConfigFiles"，fileName); 

但是我仍然遇到相同的错误:

找不到路径"wwwroot/ConfigFiles/appsettings.json"的一部分.

由于客户端Blazor中没有 IHostingEnvironment 的概念，因此在此处读取静态JSON文件的正确方法是什么?

解决方案

我有一个客户端Blazor应用程序

好的，这意味着 File.ReadAllText(...)和 Path.Combine(...)根本不起作用.客户端意味着您可以在Android或Mac-OS或任何其他版本上运行.

Blazor团队以FetchData示例页面的形式为您提供了有关如何读取文件的完整示例.

  forecasts =等待Http.GetJsonAsync< WeatherForecast []>("sample-data/weather.json"); 

这将为您获取 wwwroot/sample-data
中文件的内容如果需要AllText，可以使用 Http.GetStringAsync(...)

如果要按用户设置，请查看Blazored.LocalStorage程序包.

I have a client side Blazor Application. I want to have an appsetting.json file for my client-side configuration like we have an environment.ts in Angular.

For that, I am keeping a ConfigFiles folder under wwwroot and a JSON file inside of it. I am trying to read this file as below.

First get the path:

public static class ConfigFiles
{
    public static string GetPath(string fileName)
    {
        return Path.Combine("ConfigFiles", fileName);
    }
}

Than read it:

public string GetBaseUrl()
{
    string T = string.Empty;
    try
    {
        T = File.ReadAllText(ConfigFiles.GetPath("appsettings.json"));
    }
    catch (Exception ex)
    {
        T = ex.Message;
    }
    return T;
}

But I always get the error:

Could not find a part of the path "/ConfigFiles/appsettings.json".

Inside the GetPath() method, I also tried:

return Path.Combine("wwwroot/ConfigFiles", fileName);

But I still get the same error:

Could not find a part of the path "wwwroot/ConfigFiles/appsettings.json".

Since there is no concept of IHostingEnvironmentin client-side Blazor, what is the correct way to read a static JSON file here?

解决方案

I have a client side Blazor Application

OK, That means that File.ReadAllText(...) and Path.Combine(...) are not going to work at all. Client-side means that you could be running on Android or Mac-OS or whatever.

The Blazor team provides you with a complete sample of how to read a file, in the form of the FetchData sample page.

forecasts = await Http.GetJsonAsync<WeatherForecast[]>("sample-data/weather.json");

this gets you the contents of a file in wwwroot/sample-data
You can use Http.GetStringAsync(...) if you want AllText

If you want to have per-user settings then look into the Blazored.LocalStorage package.

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