Passing Parameters using QueryParameter in MAUI

Question

Hi,

I am trying to pass PackageId and PackageName using QuerParameter in MAUI project but nothing is showing.

Hee is my sample:

https://github.com/jrahma/QueryPropertySample/tree/main/QueryPropertySample

Kindly help..

Thanks,
Jassim

Answer 1

Hello,

if you have multiple parameters like PackageID and PackageName, does this. mean you have to create another method for every parameter?

You can create an object with PackageID and PackageName attributes. then send this object by QueryProperty.

For example, I create a Package class.

   public class Package  
   {  
       public string packageId { get; set; }  
      public string packageName { get; set; }  
   }  

Then I send this object by Dictionary in the GoTapGestureRecognizer_Tapped method.

   async void  GoTapGestureRecognizer_Tapped(object sender, EventArgs e)  
       {  
              Label lbl = (Label)sender;  
          
              Package package=  new Package() { packageId = lbl.Text, packageName = "yourpageName" };  
     
              var navigationParameter = new Dictionary<string, object> { { "MyPackage", package } };  
     
              await Shell.Current.GoToAsync($"MyPage2", navigationParameter);  
      }  

You can get this object in the MyPage2's background code. Please notice I change the property in QueryProperty and MyPage2.cs like the following code.

   [QueryProperty(nameof(MyPackage), "MyPackage")]  
   public partial class MyPage2 : ContentPage  
   {  
       public Package MyPackage  
       {  
           set  
           {  
               ShowMessage(value);  
           }  
       }  
       public MyPage2()  
       {  
           InitializeComponent();  
           
       }  
     
      public async void ShowMessage(Package package)  
       {  
           var id = package.packageId;  
           var name = package.packageName;  
          await DisplayAlert("Query", id+ name, "Ok");  
       }  
   }  

You can refer to this document about Pass data

Here is a document about passing and processing multiple items of data in shell with QueryProperty.

Best Regards,

Leon Lu

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