您好,我正在使用 C# HttpClient 从 api 中提取数据。我需要使用 post 方法以表单数据形式提取数据。我写了下面的代码,但得到了一个空的响应。我该怎么做?
var client = new HttpClient();
client.Timeout = TimeSpan.FromSeconds(300);
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));
var request = new HttpRequestMessage();
request.Method = HttpMethod.Post;
request.RequestUri = new Uri("https://myapi.com");
var content = new MultipartFormDataContent();
var dataContent = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("value1", "myvalue1"),
new KeyValuePair<string, string>("value2", "myvalue2"),
new KeyValuePair<string, string>("value3", "myvalue3")
});
content.Add(dataContent);
request.Content = content;
var header = new ContentDispositionHeaderValue("form-data");
request.Content.Headers.ContentDisposition = header;
var response = await client.PostAsync(request.RequestUri.ToString(), request.Content);
var result = response.Content.ReadAsStringAsync().Result;
您使用 以不正确的方式发送数据FormUrlEncodedContent
。要将参数作为MultipartFormDataContent
字符串值发送,您需要替换下面的代码
var dataContent = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("value1", "myvalue1"),
new KeyValuePair<string, string>("value2", "myvalue2"),
new KeyValuePair<string, string>("value3", "myvalue3")
});
有了这个:
content.Add(new StringContent("myvalue1"), "value1");
content.Add(new StringContent("myvalue2"), "value2");
content.Add(new StringContent("myvalue3"), "value3");
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