我有一个读取 Json 文件的静态帮助程序类,我需要在另一个公共类中调用该文件并返回 200 响应代码,并以 JSON 文件路径作为响应。
JSON 是静态文件。只是我想学习如何使用我读取的 JSON 文件返回响应代码
代码
Helper.cs
:
public static class Helper
{
public static async Task<string> GetRequestBody(HttpContext httpContext)
{
string body;
if (httpContext.Request.HasFormContentType)
{
body = JsonSerializer.Serialize(httpContext.Request.Form.ToList());
}
else
{
// Create StreamReader And Starting Reading The Request Body.
using var streamReader = new StreamReader(httpContext.Request.Body, Encoding.UTF8, true, 1024, true);
// Assign The Stream Content To The Payload Object
body = await streamReader.ReadToEndAsync();
}
return body;
}
public static async Task Main(string[] args)
{
string filePath = "path/to/your/file.json";
var jsonData = await ReadJsonFileAsync(filePath);
Console.WriteLine(jsonData);
}
public static async Task<string> ReadJsonFileAsync(string filePath)
{
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
using (StreamReader reader = new StreamReader(fs))
{
return await reader.ReadToEndAsync();
}
}
}
}
代码片段
Employeerecord.cs
:
public class Employeerecord : IEmployeerecord
{
public Task<List<Domain.Models.EmployeeRecordData>> GET_Employeerecorddata(int employeelist, int employeeId)
{
// How to call the ReadJSonFileASync from Helper class here
// also return 200 code with Json filepath response
}
}
首先你必须使
GET_Employeerecorddata
方法异步,然后你可以调用 Helper.ReadJsonFileAsync
方法,如下所示:
public class Employeerecord : IEmployeerecord
{
public async Task<List<Domain.Models.EmployeeRecordData>> GET_Employeerecorddata(int employeelist, int employeeId)
{
// Call the ReadJSonFileASync from Helper class
string filePath = "path/to/your/file.json";
string json = await Helper.ReadJsonFileAsync(filePath);
}
}
还要确保添加适当的
using
语句以包含 Helper.cs
类所属的命名空间。
您的要求相当广泛,但我想我可以提供最少的信息来帮助您入门。
首先,看起来您正在寻找某个将从文件返回数据的端点。
要创建此类端点(HTTP 端点),您需要创建 Web 应用程序,在 .NET 中,您可以通过创建 ASP.NET Core 应用程序之一来完成此操作。为了简单起见,我们可以使用 Web API,将前端排除在外。
因此,创建“ASP.NET Core Web API”类型的新项目(使用 dotnet CLI 就只是
dotnet new webapi
)。
您将拥有
Program.cs
,您将对其进行修改以定义端点,它应该如下所示:
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
var summaries = new[]
{
"Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
};
app.MapGet("/weatherforecast", () =>
{
var forecast = Enumerable.Range(1, 5).Select(index =>
new WeatherForecast
(
DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
Random.Shared.Next(-20, 55),
summaries[Random.Shared.Next(summaries.Length)]
))
.ToArray();
return forecast;
})
.WithName("GetWeatherForecast")
.WithOpenApi();
app.Run();
record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
{
public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
}
我们将删除模板中所有与天气相关的数据。
相反,我们将定义读取文件的方法并调整端点以使用它。以下是更改:
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.MapGet("/get-json-data", () =>
{
var filePath = "path/to/your/file.json";
var jsonData = await Helper.ReadJsonFileAsync(filePath);
return jsonData;
})
.WithOpenApi();
app.Run();