大家好，我正在嘗試通過使用 php Web 服務登錄來從 url 下載數據，但我不知道該怎么做。如果我通過郵遞員發出 POST 請求，在 BODY -> form-data 中插入電子郵件和密碼，它會給出以下內容：{“用戶”：[{“電子郵件”：“[email protected]”，“昵稱”：“昵稱”，“圖像”：“http://localhost/MyWebService/images/test_img.png “}]}所以我在cs中創建了一個類，如下所示：public class Users { [JsonProperty("users", NullValueHandling = NullValueHandling.Ignore)] public User[] UsersUsers { get; set; } } public class User { [JsonProperty("email", NullValueHandling = NullValueHandling.Ignore)] public string email { get; set; } [JsonProperty("nickname", NullValueHandling = NullValueHandling.Ignore)] public string nickname { get; set; } [JsonProperty("password", NullValueHandling = NullValueHandling.Ignore)] public string password { get; set; } [JsonProperty("image", NullValueHandling = NullValueHandling.Ignore)] public Uri image { get; set; } }相反，在 botton 函數中，我嘗試編寫此代碼來聯系服務并進行調用：async private void login(Object sender, EventArgs e) { string email = lbl_email.Text; string password = lbl_password.Text; string url = "http://192.168.178.77/TestLoginURL/api/login.php"; var formContent = new FormUrlEncodedContent(new[] { new KeyValuePair<string, string>("email", email), new KeyValuePair<string, string>("password", password), }); string contentType = "application/json"; JObject json = new JObject { { "email", email}, { "password", password } }; HttpClient client = new HttpClient(); var response = await client.PostAsync(url, new StringContent(json.ToString(), Encoding.UTF8, contentType)); var data = await response.Content.ReadAsStringAsync(); var users = JsonConvert.DeserializeObject<Users>(data); }顯然它被壓垮了，給我的錯誤是這樣的：Newtonsoft.Json.JsonReaderException 解析值時遇到意外字符：<。路徑 ''，第 0 行，位置 0。那么，有人可以幫助我嗎？我哪里錯了？謝謝
1 回答
冉冉說
TA貢獻1877條經驗 獲得超1個贊
這樣解決：
async private void login(Object sender, EventArgs e)
{
string email = lbl_email.Text;
string password = lbl_password.Text;
string url = "http://192.168.178.77/TestLoginURL/api/login.php";
Users users = new Users();
FormUrlEncodedContent formContent = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("email", email),
new KeyValuePair<string, string>("password", password),
});
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Add("Accept", "application/json");
try
{
CancellationTokenSource cts = new CancellationTokenSource();
var responseMessage = client.PostAsync(url, formContent).Result;
var data = await responseMessage.Content.ReadAsStringAsync();
users = JsonConvert.DeserializeObject<Users>(data);
lbl_nickname.Text = users.UsersUsers[0].nickname;
}
catch (Exception ex)
{
ex.Message.ToString();
throw;
}
}
我將參數傳遞給 url 的方式實際上是錯誤的，因此它無法識別我發送的電子郵件和密碼，從而導致錯誤。
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