我的视图模型中有一个Icommand,如下所示:
public ICommand SalaryCommand
{
get
{
return new Command(async () =>
{
await _apiServices.FetchSalary(this);
});
}
}
我将此命令绑定到一个按钮上,以搜索某个用户的薪水历史记录,以便它可以输出信息,这非常有效。但是,我还想在加载时以最新薪水执行它信息(当前月份)。 Icommand有可能吗?如果没有,我可以通过什么其他方式在加载时实现此功能。 *注意:这些变量都与SalaryCommand存在于同一视图模型中,而不存在于FetchSalary()类中。
我尝试在主薪资页面上执行此操作,但此操作无效:
public SalaryPage()
{
InitializeComponent();
Fetching();
}
private async void Fetching()
{
ApiServices _apiServices = new ApiServices();
SalaryViewModel svm = new SalaryViewModel();
string year = DateTime.Now.Year.ToString();
string month = DateTime.Now.Month.ToString();
await _apiServices.FetchSalary(svm);
}
这是适用于按钮的FetchSalary()函数
public async Task FetchSalary(SalaryViewModel svm)
{
Debug.WriteLine("Welcome to the fetch salary method");
var keyValues = new List<keyvaluepair<string,string>>
{
new keyvaluepair<string,string>("UserID",App._username),new keyvaluepair<string,string>("Year",svm.dSYear),string>("Month",svm.dSMonth)
};
var request = new HttpRequestMessage(HttpMethod.Post,"somelink");
request.Content = new FormUrlEncodedContent(keyValues);
var client = new HttpClient();
var response = await client.SendAsync(request);
var content = await response.Content.ReadAsStringAsync();
Debug.WriteLine(content);
start = content.IndexOf("Sal_Trsp") + "Sal_Trsp".Length;
end = content.IndexOf("Sal_NssfMedPay") - start;
string transportation = content.Substring(start,end);
svm.sTransportation = "Transportation: " + simplify(transportation);
start = content.IndexOf("Sal_Date_Year") + "Sal_Date_Year".Length;
end = content.IndexOf("Sal_Date_Month") - start;
string yyear = content.Substring(start,end);
svm.sYear = "Year: " + simplify(yyear);
start = content.IndexOf("Sal_Date_Month") + "Sal_Date_Month".Length;
end = content.IndexOf("}") - start;
string mmonth = content.Substring(start,end);
svm.sMonth = "Month: " + simplify(mmonth);
start = content.IndexOf("Sal_NetPaid") + "Sal_NetPaid".Length;
end = content.IndexOf("Sal_users_FK") - start;
string retString = content.Substring(start,end);
svm.snetPay = "Net Paid: " + simplify(retString);
Debug.WriteLine(svm.snetPay);
}