HttpClient 从 Request.Form .NET Core 复制数据

Question

我有 POST 查询表单数据和文件，我需要将相同的数据发送到另一个 POST 请求。我将为此 HttpClient 使用 class.

有没有办法复制所有 Request.Form 数据并将它们插入到新请求中？或者我需要添加每个参数？

我的意思是这样的：

var httpClient = new HttpClient();
var httpResponseMessage = await httpClient.PostAsync("some_url", Request.Form);

Answer 1

Is there a way to copy all Request.Form data and insert them to new request? Or I need to add every param?

您需要像下面这样添加每个参数：

项目 A 中的模型：

public class FormData
{
    public int Id { get; set; }
    public IFormFile File { get; set; }
    public string Name { get; set; }
}

在项目 A 中查看：

@model FormData
<form asp-action="Post" enctype="multipart/form-data">
    <div>
        Id:<input asp-for="Id"/>
    </div>
    <div>
        Name:<input asp-for="Name"/>
    </div>
    <div>
        FIle:<input asp-for="File" />
    </div>
    <div>
        <input type="submit" value="create" />
    </div>
</form>

项目 A 中的控制器：

[HttpPost]
public async Task<IActionResult> Post(FormData formData)
{
    HttpClient client = new HttpClient();
    // var formData = HttpContext.Request.Form;
    client.BaseAddress = new Uri("http://localhost:63331");//your applicationUrl
    client.DefaultRequestHeaders.Accept.Clear();

    var multiContent = new MultipartFormDataContent();

    var file = formData.File;
    if (file != null)
    {
        var fileStreamContent = new StreamContent(file.OpenReadStream());
        multiContent.Add(fileStreamContent, "File", file.FileName);
    }

    multiContent.Add(new StringContent(formData.Id.ToString()), "id");
    multiContent.Add(new StringContent(formData.Name.ToString()), "name");


    var response = await client.PostAsync("/api/values", multiContent);
    //do your stuff...
    return Ok();
}

项目 B 中的模型：

public class FormDataModel
{
    public int Id { get; set; }
    public IFormFile File { get; set; }
    public string Name { get; set; }
}

项目 B 中的控制器：

[HttpPost]
public void Post([FromForm]FormDataModel model)
{
      //...
}

结果：

HttpClient 从 Request.Form .NET Core 复制数据

HttpClient copy data from Request.Form .NET Core

dotnet-httpclient

.net-core

asp.net-core-webapi