Windows-8.1

Pass data from User Control to Parent page in Windows Phone 8.1

While using User Controls in Windows Phone, we often get into a situation where we need to pass some kind of data from the user control to the parent page, when any operation is performed on the user control. Delegates can be used to pass data from the User Control to the Parent page. We reference C# Corner’s article to apply the same logic in Windows Phone 8.1

Step 1: Create a User Control

Firstly, we create an User Control with a button in it.

Step 2: Declare a delegate on the User Control

Create a delegate on the user control, that can encapsulate a method that takes no input and returns a DateTime type.

Step 3: Create an event on the User Control

Declare an event on the user control, that is of the delegate type that we created.

Step 4: Using User Control in the Parent Page

Next, we use the User Control in our MainPage.xaml.

Step 5: Subscribe to the User Control event in the Parent Page

Our main page will subscribe to the event that we created on the user control, to get notification of when the event is fired on the user control.

Step 6: Execute the Event Explicitly in the User Control

Next, when the button click functionality is done, we explicitly execute the event by calling the GetDataFromChild event, passing the required data.

Run the application and click the button. On the clicking of the button, when we make the explicit call to the event from the user control, the parent page receives the notification through the UChild_GetDataFromChild method.

User_Control_Data_Passing.zip

Vivek Maskara

I am pursuing BTech in Software Engineering from Delhi Technological University. I develop apps, create websites and blog about my app experiences.

  • Lexi Mize

    Your step:

    Step 5: Subscribe to the event in User Control

    should read:

    Step 5: Subscribe to the User Control event in the Parent Page

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