Windows Phone获取网格的高度和宽度

Question

I try to get get height and width of grid:

int numberOfColumnsInGameView = (int)(gameView.Width / objectSize);
int numberOfRowsInGameView = (int)(gameView.Height / objectSize -0.5);

Where gameView is grid. When I try assign to variable I have that var = NaN

Answer 1

I suggest you to use Grid.ActualHeight and Grid.ActualWidth properties. You should use Height and Width only if you need to set a new value.

Answer 2

The most conservative way is probably to do something like this:

private double HeightOf(FrameworkElement element)
{
    if (double.IsNaN(element.Height))
        return element.ActualHeight;
    if (double.IsNaN(element.ActualHeight))
        return element.Height;
    return Math.Max(element.Height, element.ActualHeight);
}

This way, you cover the following cases:

• Element is rendered, but no explicit height is set (→ ActualHeight )
• Element is not rendered yet, but has an explicit height (→ Height )
• Neither one (will return 0)

Answer 3

Thx I understood.

this.Loaded += MainPage_Loaded; 
.........
private void GeneranteLevel(int level)
    {
int numberOfColumnsInGameView = (int)(gameView.ActualWidth / objectSize);
int numberOfRowsInGameView = (int)(gameView.ActualHeight / objectSize -0.5);
........