无法将字符串转换为 system.Net.HttpContent

Question

我在这里尝试从服务中获取数据：

public async Task<IHttpActionResult> ValidateSesion()
{
    var values = new Dictionary<string, string>{
        { "productId", "1" },
        { "productKey", "Abc6666" },
        { "userName", "OPPO" },
    };
    var json = JsonConvert.SerializeObject(values, Formatting.Indented);
    // var content = new FormUrlEncodedContent(json);
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    var response = await client.PostAsync("http://172.116.12.172:8014/iadmin/validate", json);
    var responseString = await response.Content.ReadAsStringAsync();
    return Ok(responseString);
}

如果我进行任何 PostMan 调用，如下所示，我得到的数据如下所示：

{
    "productId": "1",
    "productKey": "Abc6666" 
}

Answer 1

将您的return语句更改为

return Content(responseString);

Answer 2

您不能 post 原始字符串，您必须将其包装在 StringContent 中： new StringContent(json);

这应该可以解决问题：

public async Task<IHttpActionResult> ValidateSesion()
{
    var values = new Dictionary<string, string>{
      { "productId", "1" },
      { "productKey", "Abc6666" },
      { "userName", "OPPO" },
    };

    var json = JsonConvert.SerializeObject(values, Formatting.Indented);

    var stringContent = new StringContent(json);

    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    var response = await client.PostAsync("http://172.116.12.172:8014/iadmin/validate", stringContent);

    var responseString = await response.Content.ReadAsStringAsync();

    return Ok(responseString);
}

无法将字符串转换为 system.Net.HttpContent

Can't convert string to system.Net.HttpContent

c#

json

asp.net-web-api

dotnet-httpclient