问题
Is it possible to set the Default Content-Type to "application/json;v=2.0". I say default because I'm using a HttpClient class and I use the DefaultRequestHeaders to set my proxies default values.
I followed this example to create my headers https://stackoverflow.com/a/10679340/196526 but I also use versioning and information about versioning is saved in ContenT-Type
public class BankAccountProxy
{
public void SetToken()
{
Client = new HttpClient();
Client.BaseAddress = new Uri(System.Configuration.ConfigurationManager.AppSettings["ApiRoute"]);
Client.DefaultRequestHeaders.Accept.Clear();
Client.DefaultRequestHeaders.Add("Token", ApiInformations.ApiToken);
Client.DefaultRequestHeaders
.Accept
.Add(new MediaTypeWithQualityHeaderValue($"application/json;v=2.0"));
}
public async Task<IEnumerable<BankAccount>> Get()
{
HttpResponseMessage response = await Client.GetAsync($"/api/BankAccount/");
response.EnsureSuccessStatusCode();
IEnumerable<BankAccount> bankAccount;
bankAccount = await response.Content.ReadAsAsync<IEnumerable<BankAccount>>();
return bankAccount;
}
}
When I run this code I get a
Exception message: The format of value 'application/json;v=2.0' is invalid.
Because of the v=2.0 that is probably not a valid MediaTypeWithQualityHeaderValue.
What I want is to be sure I always send the version information in my Content-Type header value. How can I initialize it? How can I tell my code my default content type is not a quality header but a valid one.
For information here is my query perfectly working on Postman:
来源：https://stackoverflow.com/questions/55644730/is-it-possible-to-set-the-default-content-type-to-application-jsonv-2-0