C#•12mo ago

❔ Populate a grid .NET MAUI

Hello guys, I want to create a grid following some logic but I can't find a solution. I use 2 bindableProperties to know how many rows and columns I should create, like so

public static readonly BindableProperty OptionsProperty = BindableProperty.Create(
        nameof(Options), typeof(List<Option>), typeof(LikertMultiple), propertyChanged: (bindable, oldValue, newValue) =>
        {
            var control = (LikertMultiple)bindable;
            control.OptionsLabels.ItemsSource = (List<Option>)newValue;

            control.columns = new List<ColumnDefinition>();
            for (int i = 0; i < control.NumberOfColumns; i++)
            {
                ColumnDefinition col = new ColumnDefinition();
                control.columns.Add(col);
                control.myGrid.ColumnDefinitions.Add(col);
            }
        });

    public static readonly BindableProperty RowsProperty = BindableProperty.Create(
        nameof(Rows), typeof(List<LikertQuestion>), typeof(LikertMultiple), propertyChanged: (bindable, oldValue, newValue) =>
        {
            //Same for rows
            }
        });

    public List<Option> Options
    {
        get => (List<Option>)GetValue(OptionsProperty);
        set => SetValue(OptionsProperty, value);
    }

    public List<LikertQuestion> Rows
    {
        //same
    }

public static readonly BindableProperty OptionsProperty = BindableProperty.Create(
        nameof(Options), typeof(List<Option>), typeof(LikertMultiple), propertyChanged: (bindable, oldValue, newValue) =>
        {
            var control = (LikertMultiple)bindable;
            control.OptionsLabels.ItemsSource = (List<Option>)newValue;

            control.columns = new List<ColumnDefinition>();
            for (int i = 0; i < control.NumberOfColumns; i++)
            {
                ColumnDefinition col = new ColumnDefinition();
                control.columns.Add(col);
                control.myGrid.ColumnDefinitions.Add(col);
            }
        });

    public static readonly BindableProperty RowsProperty = BindableProperty.Create(
        nameof(Rows), typeof(List<LikertQuestion>), typeof(LikertMultiple), propertyChanged: (bindable, oldValue, newValue) =>
        {
            //Same for rows
            }
        });

    public List<Option> Options
    {
        get => (List<Option>)GetValue(OptionsProperty);
        set => SetValue(OptionsProperty, value);
    }

    public List<LikertQuestion> Rows
    {
        //same
    }

So this works, like it creates a grid and if i put some new elements in the grid such as

myGrid.setColumn(text, 1);
myGrid.setRow(text, 1);

myGrid.setColumn(text, 1);
myGrid.setRow(text, 1);

it works But what I can't understand is that the columns and rows lists are null and if i do something like

myGrid.setColumn(columns.Count -1, 1);
myGrid.setRow(rows.Count -1, 1);

myGrid.setColumn(columns.Count -1, 1);
myGrid.setRow(rows.Count -1, 1);

it won't work. Thank you

1 Reply

Accord•12mo ago

Looks like nothing has happened here. I will mark this as stale and this post will be archived until there is new activity.

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❔ Populate a grid .NET MAUI