C#中HttpClient问题"Properties can only be modified before sending the first request"

Question

使用HttpClient的C#代码如下： public class TestClass { private static readonly HttpClient _httpClient = new HttpClient(); public async Task TestMethod () { //... _httpClient.BaseAddress = new Uri("http://xxx"); //... } } 运行时报错 System.InvalidOperationException: This instance has already started one or more requests. Properties can only be modified before sending the first request. at System.Net.Http.HttpClient.CheckDisposedOrStarted() at System.Net.Http.HttpClient.set_BaseAddress(Uri value)

Answer 1

在初始化的时候就定义BaseAddress呗

Answer 2

我还以为java类库~

不清楚你上下文，但堆栈貌似很明白。

不过还是推荐这种低级类库别用了，直接用RestSharp，我写外挂有时都用这玩意儿，认证、序列化等等封装都比较可以。

Answer 3

HttpClient - This instance has already started