[英]How to send a json file with HttpClient in C#?
我正在尝试用邮递员发送一个 JSON 文件并且它正在工作。 但是当我尝试通过HttpClient
发送相同的内容时,它不起作用。
System.IO.File.WriteAllText(dirName + "\\importproduct.json", jsonitems);
var fileByteArray = File.ReadAllBytes(dirName + "\\importproduct.json");
using (var _client = new HttpClient())
{
using (var content = new MultipartFormDataContent())
{
content.Add(new StreamContent(new MemoryStream(fileByteArray)), "file");
var url = $"{firmInfo.ServiceUrl}/product/api/products/import";
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", bearer_token.id_token);
var response = _client.PostAsJsonAsync(url, content).Result;
var result = response.Content.ReadAsStringAsync().Result;
}
}
而不是使用 PostAsJsonAsync(); 你应该使用 PostAsync() 的方法; 所以你的代码应该看起来像这样
using (var _client = new HttpClient())
{
using (var content = new MultipartFormDataContent())
{
content.Add(new StreamContent(new MemoryStream(fileByteArray)), "file");
var url = $"{firmInfo.ServiceUrl}/product/api/products/import";
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", bearer_token.id_token);
var response = _client.PostAsync(url, content).Result;
var result = response.Content.ReadAsStringAsync().Result;
}
}
PostAsJsonAsync
方法是一种通用方法,它期望将序列化并在 POST 正文中发送的对象作为第二个参数。
var obj = JsonConvert.DeserializeObject<SomeModelClass>(jsonString);
var response = await _client.PostAsJsonAsync(url, obj).Result;
这是基于efecetir上面的帖子。 这个对我有用。 顺便说一句,我也赞成他的帖子。 我的问题是我需要在基于内容的级别设置内容类型。
var fileByteArray = File.ReadAllBytes(filePath);
HttpContent bytesContent = new ByteArrayContent(fileByteArray);
using (var httpClient = new HttpClient())
using (var formData = new MultipartFormDataContent())
{
var RequestUri = new Uri($"http://whatever.com/");
//client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", bearer_token.id_token);
formData.Headers.Add("super-secret-key", "blah");
bytesContent.Headers.ContentType = System.Net.Http.Headers.MediaTypeHeaderValue.Parse("application/json");
//httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json")); //("multipart/form-data")); // Not needed
formData.Add(bytesContent, "file", "blah.json");
var response = httpClient.PostAsync(RequestUri, formData).Result;
return await HandleResponse(response);
}
感谢您的意见。 我修复了它并将我的代码转换如下。 现在它正在工作并且更加干净。
HttpContent bytesContent = new ByteArrayContent(fileByteArray);
using (var client = new HttpClient())
using (var formData = new MultipartFormDataContent())
{
var url = $"{firmInfo.ServiceUrl}/product/api/products/import";
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", bearer_token.id_token);
formData.Add(bytesContent, "file", "importproduct.json");
var response = client.PostAsync(url, formData).Result;
var result = response.Content.ReadAsStringAsync().Result;
}
这是我用来发布表单信息和文件的代码
using (var httpClient = new HttpClient())
{
var surveyBytes = ConvertToByteArray(surveyResponse);
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var byteArrayContent = new ByteArrayContent(surveyBytes);
byteArrayContent.Headers.ContentType = MediaTypeHeaderValue.Parse("text/csv");
var url = $"{firmInfo.ServiceUrl}/product/api/products/import";
var response = await httpClient.PostAsync(url , new MultipartFormDataContent
{
{byteArrayContent, "\"file\"", dirName + "\\importproduct.json"}
});
return response;
}
这适用于 .net 4.5。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.