有誰知道當出現 Specified cast is not valid 之類的錯誤時會發生什么？我評論了錯誤發生的那一行
private async void GetEmployee()
{
var _token = await GetAccessToken();
using (var _client = new HttpClient())
{
var _uri = "domain here";
_client.BaseAddress = new Uri(_uri);
_client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
_client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", _token);
var _response = await _client.GetAsync("endpoint here'");
var Emp = JsonConvert.DeserializeObject<Employee>(await _response.Content.ReadAsStringAsync());
Employee = new ObservableCollection<Employee>((IEnumerable<Employee>)Emp); //Im having error on this line
}
}
ObservableCollection<Employee> _employee;
public ObservableCollection<Employee> Employee
{
get
{
return _employee;
}
set
{
_employee = value;
OnPropertyChanged();
}
}
uj5u.com熱心網友回復：
如何改變這個：
Employee = new ObservableCollection<Employee>((IEnumerable<Employee>)Emp);
對此：
Employee = new ObservableCollection<Employee>(new[] {Emp});
請參閱 .NET Fiddle 示例。
請參閱 ObservableCollection 檔案。
Thenew[] { ... }是new Employee[] { ... }and 創建一個新陣列，其初始值位于{and 中}。
請參閱陣列檔案。
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標籤：C＃ 沙马林 xamarin.forms