Passing data using Shell and remember it

Question

Hi,

I am trying to pass data from Page-A to Page-B using the following:

In Page-A:

await Shell.Current.GoToAsync($"MemberDetails?MyMember=1000", true);  

and In Page-B:

[QueryProperty("Member", "MyMember")]  

then:

private string member;  
public string Member  
{  
    set { member = value; }  
    get { return member; }  
}  

but when I try to display the value in Page-B using:

DisplayAlert("member", member, "Ok");  

It does not show any value.

Please see the attached sample.

https://www.bluefile.app/temp/ShellNavigation.zip

Kindly help..

Thanks,
Jassim

Answer 1

Hello,

No, there is no need to set another variable.

Your issue is caused by that you set LabelParameter.Text = member; in your page constructor method.

Therefore, your program will call LabelParameter.Text = member; at first, then call member = value; secondly.

You could use the following ways to deal with the issue:

Method 1:

You could call LabelParameter.Text = member; in the setter method:

   set   
   {   
       member = value;   
       LabelParameter.Text = member;  
   }  

Method 2:

You could call LabelParameter.Text = member; in the OnAppearing method:

   protected override void OnAppearing()   
   {  
       base.OnAppearing();  
       LabelParameter.Text = member;  
   }  

Best Regards,

Alec Liu.

---

If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.