Xamarin forms Button click count

Question

When user click on btnOffline on Main page, it will redirect them to second page. I will record the time stamp when user click on button done (button_clicked event) on second Page. The error I am facing right now is when it navigates back to main page after button_clicked event, I click on btnOffline and btnDone again, the timestamp for lblEndDT changes. I only want to get the first click from second page but it still changes

Main Page

 public partial class MainPage : ContentPage
{
public string mainpagevalue;

int offlinecount = 0;
int onlinecount = 0;

public MainPage()
{
    InitializeComponent();

}
private void btnOffline_Clicked(object sender, EventArgs e)
{
    offlinecount++;
    txtOfflineStatus.Text = "IN PROGRESS";

    Navigation.PushAsync(new SecondPage(this, lblEndDT, txtOfflineStatus, btnOnline, btnMH));


    if (offlinecount == 1)
    {
        string currentDT = DateTime.Now.ToString();
        lblStartDT.Text = currentDT;
      }


   }

Second Page

public partial class SecondPage : ContentPage
{
    Label MainPagelblEndDT;
    MainPage mainPage;
    ImageButton myImageBtn;
    int btndonecount = 0;
public SecondPage()
{
    InitializeComponent();
}

public SecondPage(MainPage mainP,Label lblEndDT)
{
    InitializeComponent();

    //Get the lblEndDT reference here
    MainPagelblEndDT = lblEndDT;
    //Get the MainPage reference here
    mainPage = mainP;
}

public SecondPage(MainPage mainP, Label lblEndDT, ImageButton imageBtn)
{
    InitializeComponent();

    //Get the lblEndDT reference here
    MainPagelblEndDT = lblEndDT;
    //Get the MainPage reference here
    mainPage = mainP;
    //Get the ImageButton reference here
    myImageBtn = imageBtn;
}

private void Button_Clicked(object sender, EventArgs e)
{           
    btndonecount++;
    if(btndonecount == 1)
    {

       string edt = DateTime.Now.ToString();
       MainPagelblEndDT = edt;
       mainPage.mainpagevalue = MainPagelblEndDT.Text;
    }

       Navigation.PopAsync();
   }
}

Jack Hua Jack Hua · Accepted Answer · 2020-03-13T09:17:38

When you click on btnOffline and btnDone again, the btndonecount in SecondPage reset, so it still changes.

You should get the click count from mainPage, pass the offlinecount to SecondPage:

private void btnOffline_Clicked(object sender, EventArgs e)
{
    offlinecount++;
    txtOfflineStatus.Text = "IN PROGRESS";

    Navigation.PushAsync(new SecondPage(this, lblEndDT, txtOfflineStatus, btnOnline, btnMH,offlinecount));


    if (offlinecount == 1)
    {
        string currentDT = DateTime.Now.ToString();
        lblStartDT.Text = currentDT;
    }


}

In the SecondPage, get the clickCount and remove the btndonecount++:

   public SecondPage(MainPage mainP, Label lblEndDT, ImageButton imageBtn, int clickCount)
    {
        InitializeComponent();

        //Get the lblEndDT reference here
        MainPagelblEndDT = lblEndDT;
        //Get the MainPage reference here
        mainPage = mainP;
        //Get the ImageButton reference here
        myImageBtn = imageBtn;

        btndonecount = clickCount;
    }

    private void Button_Clicked(object sender, EventArgs e)
    {
        if (btndonecount == 1)
        {
            string edt = DateTime.Now.ToString();
            MainPagelblEndDT = edt;
            mainPage.mainpagevalue = MainPagelblEndDT.Text;
        }

        Navigation.PopAsync();
    }

Xamarin forms Button click count

1 Answers