Popup_data_handling - lucyberryhub/WPF.Tutorial GitHub Wiki

πŸ’ How to Handle Image Data Between a Parent and Popup in WPF πŸ“

Hey there, sweet berries! πŸ“πŸ’ Welcome to this super cute tutorial where we’ll learn how to pass and update image data between a parent DataGrid and a popup child in WPF. πŸ’– We're going to use our favorite cherry berry icons and make everything look deliciously adorable! Let’s dive in! 🌸

🌸 Overview: How This Works

In this tutorial, we will:

  • Pass an image path from a DataGrid cell to a popup ImagePreview.
  • Let the user select an image in the popup.
  • Return the image path back to the DataGrid and update the cell with the selected image.
  • Save the updated data to a JSON file! πŸ’πŸ’Ύ

We’ll break everything down into these simple steps!

πŸ“ Step 1: Set Up the Event in the Parent

In the parent, we need to listen for the BerryImageSelected event to capture the selected image path and update the DataGrid cell with it. First, we need to subscribe to the event when the parent window is initialized. πŸ“βœ¨

πŸ’ Code Snippet: Subscribe to the Event 

public ParentWindow() 
{
    InitializeComponent();

    // Subscribe to the event at initialization
    if (BerrySelectionView is EnvBerryPopup berryPopupView)
    {
        berryPopupView.BerryImageSelected += OnBerryImageSelected;
    }
}

Here, we check if the BerrySelectionView is of type EnvBerryPopup. If it is, we subscribe to the BerryImageSelected event and link it to our handler method OnBerryImageSelected.

🌸 Step 2: Handling Image Selection in the Parent

We need to handle the image selection in the parent. When the user selects a berry image, the BerryImageSelected event is triggered, and the selected image path is passed back to the parent. We then update the corresponding DataGrid cell and save the changes to a JSON file! πŸ’πŸ“

πŸ’ Code Snippet: Handle Image Selection and Update the DataGrid 

private DataGridCell clickedBerryCell;

private void BerryGrid_DataGridCellClick(object sender, MouseButtonEventArgs e)
{
    // Close the BerryPopup by default
    BerryPopup.IsOpen = false;

    // Use VisualTreeHelper to find the clicked DataGridCell
    DependencyObject clickedElement = e.OriginalSource as DependencyObject;

    while (clickedElement != null && !(clickedElement is DataGridCell))
    {
        clickedElement = VisualTreeHelper.GetParent(clickedElement);
    }

    if (clickedElement is DataGridCell cell)
    {
        clickedBerryCell = cell; // Store the clicked cell for later use

        // Get the column associated with the cell
        var berryColumn = cell.Column;

        // Get the row's data context, which represents the data object for that row
        var berryDataContext = cell.DataContext;

        if (berryDataContext != null)
        {
            string berryPropertyName = null;
            object berryPropertyValue = null;

            // Handling DataGridTemplateColumn (for template-based columns)
            if (berryColumn is DataGridTemplateColumn berryTemplateColumn)
            {
                berryPropertyName = berryTemplateColumn.Header.ToString(); 
                berryPropertyValue = berryDataContext.GetType().GetProperty(berryPropertyName)?.GetValue(berryDataContext);
            }

            if (berryPropertyValue != null && !string.IsNullOrEmpty(berryPropertyValue.ToString()))
            {
                if (BerrySelectionView is EnvBerryPopup berryPopupView)
                {
                    berryPopupView.BerryImageSelected += OnBerryImageSelected;
                }
                BerryPopup.IsOpen = true;
            }
        }
    }
}

private void OnBerryImageSelected(string berryImagePath)
{
    // Use the selected berry image path to update the clicked DataGrid cell
    if (clickedBerryCell != null)
    {
        var berryDataContext = clickedBerryCell.DataContext;
        var berryColumn = clickedBerryCell.Column;

        if (berryDataContext != null && berryColumn is DataGridTemplateColumn berryTemplateColumn)
        {
            var berryPropertyName = berryTemplateColumn.Header?.ToString();
            if (!string.IsNullOrEmpty(berryPropertyName))
            {
                var berryPropertyInfo = berryDataContext.GetType().GetProperty(berryPropertyName);

                if (berryPropertyInfo != null)
                {
                    // Update the property with the selected berry image path
                    berryPropertyInfo.SetValue(berryDataContext, berryImagePath);

                    // Refresh the DataGrid to reflect the changes
                    BerryGrid.Items.Refresh();

                    // Update the JSON file with the new data
                    UpdateJsonFile(BerryGrid.ItemsSource.Cast<object>());
                }
            }
        }

        // Close the popup
        BerryPopup.IsOpen = false;
    }
}

πŸ’ Explanation:

  1. Capture the Click: When the user clicks a cell, we store the DataGridCell for later use.
  2. Check Column Type: We check if the column is a DataGridTemplateColumn, which is where our image is located.
  3. Trigger the Popup: If the image value exists, we open the BerryPopup and subscribe to the BerryImageSelected event.
  4. Update the Cell: After the image is selected in the popup, we use the image path to update the corresponding property in the DataGrid cell.
  5. Refresh and Save: We refresh the DataGrid to reflect the updated data and save the changes to the JSON file.

πŸ“ Step 3: Triggering the Event in the Popup

Now, in the popup (EnvBerryPopup), we need to raise the BerryImageSelected event when the user selects an image. This event will pass the selected image path back to the parent.

πŸ’ Code Snippet: Raising the Event in the Popup 

public event Action<string> BerryImageSelected;

private void Apply_Button_Click(object sender, RoutedEventArgs e)
{
    if (BerryImagePreview.Source is BitmapImage berryBitmapImage)
    {
        BerryImageSelected?.Invoke(berryBitmapImage.UriSource.ToString());
    }

    BerryImagePreview.Source = new BitmapImage();
    CloseRequested?.Invoke(this, EventArgs.Empty);
}

πŸ“ Explanation:

  • Triggering the Event: The BerryImageSelected?.Invoke() line fires the event and passes the selected image path (as a string) to any subscribers (which in this case is the parent).
  • Clear the Preview: After the event is fired, we clear the image preview and close the popup.

🌸 Step 4: Update the JSON File

Lastly, when the image is selected, we need to update the DataGrid and save everything to a JSON file. Here's how we handle the updating and saving of data:

πŸ’ Code Snippet: Update the JSON File 

private void UpdateJsonFile(IEnumerable<object> dataSource)
{
    // Convert the data source to a list of objects
    var dataList = dataSource.ToList();

    // Create or open the JSON file to save the updated data
    var json = JsonConvert.SerializeObject(dataList, Formatting.Indented);
    File.WriteAllText("data.json", json);
}

πŸ“ Explanation:

  • Serialize the Data: The data from the DataGrid is serialized into JSON format using JsonConvert.SerializeObject().
  • Save to File: We save the serialized JSON data to a file (in this case, data.json).

πŸ’ Conclusion: You Did It!

Yay! πŸ“ You’ve now learned how to pass and update image data between a DataGrid and a popup in WPF, and how to save those changes into a JSON file! πŸŽ‰

With this tutorial, your app is now berry sweet and super efficient in handling image data, updating your UI, and saving changes to your data storage. πŸ’πŸ’– Keep up the amazing work, and don’t forget to add more cherry berry icons to make everything extra cute! 🌸✨

πŸ’Œ Stay Berry Sweet and Keep Coding!

If you have any questions or run into any issues, don’t hesitate to reach out! We're here to help you stay berry productive and always keep your code fresh! πŸ“πŸ’–

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