[UWP] [C＃]设置相对于窗口的精灵表大小 - C＃UWP XAML [英] [UWP][C#]Set sprite sheet size relative to window - C# UWP XAML

问题描述

我只是在学习使用精灵工作，我无法缩小实际的精灵表，以便相对于其容器
更改大小，为了演示，它可以是整个窗口。我可以改变矩形（"recty"）本身的大小，但不能改变精灵表。这是我正在使用的XAML：

    <RelativePanel x:Name="myRelativePanel" >
    <Rectangle Width="500" x:Name="recty" RelativePanel.AlignRightWithPanel="True" RelativePanel.AlignLeftWithPanel="True" RelativePanel.AlignTopWithPanel="True" RelativePanel.AlignBottomWithPanel="True">
        <Rectangle.Fill>
            <ImageBrush AlignmentX="Left" AlignmentY="Top"   ImageSource="/Images/Hut_SpriteSheet-01a.png" Stretch="None">
                <ImageBrush.Transform>
                    <TranslateTransform x:Name="SpriteSheetOffset" X="-0" Y="0" />
                </ImageBrush.Transform>
            </ImageBrush>
        </Rectangle.Fill>
    </Rectangle>
    <Button x:Name="animateMe" Click="animateMe_Click"/>
</RelativePanel>

我想在C＃中设置ImageBrush的ImageSource的大小，但我不知道如何访问该属性或者它是否存在。任何帮助都是
非常感谢！

推荐答案

嗨  IconTroubles，

Hi IconTroubles,

>>我想在C＃中设置ImageBrush的ImageSource的大小。

>>I want to set the size of the ImageBrush's ImageSource in C#.

当你设置
ImageBrush.ImageSource ，你应该给它一个  ImageSource   object，更常见的是创建一个

BitmapImage 并将其用作值，然后您可以使用  DecodePixelWidth  和 DecodePixelHeight  属性
来设置Image的大小。以下是C＃中的代码

When you set the ImageBrush.ImageSource in the code, you should give it a ImageSource object, it's more common to create a BitmapImage and use that as a value, then you can use the DecodePixelWidth and DecodePixelHeight property to set the size of the Image. The following is the code

与您的上述XAML代码相对应。

in C# witch is corresponding to your above XAML code .

        public MainPage()
        {
            this.InitializeComponent();
            RelativePanel myRelativePanel = new RelativePanel();
            Rectangle rect = new Rectangle() { Width = 500 };
            RelativePanel.SetAlignRightWithPanel(rect, true);
            RelativePanel.SetAlignLeftWithPanel(rect, true);
            RelativePanel.SetAlignTopWithPanel(rect, true);
            RelativePanel.SetAlignBottomWithPanel(rect, true);
            ImageBrush brush = new ImageBrush();
            brush.AlignmentX = AlignmentX.Left;
            brush.AlignmentY = AlignmentY.Top;
            brush.Stretch = Stretch.None;
            BitmapImage bitmapImage = new BitmapImage();
            bitmapImage.UriSource = new Uri(this.BaseUri, "Images/Hut_SpriteSheet-01a.png");
            bitmapImage.DecodePixelWidth = 30;
            bitmapImage.DecodePixelHeight = 30;
            brush.ImageSource = bitmapImage;
            rect.Fill = brush;
            myRelativePanel.Children.Add(rect);
            this.Content = myRelativePanel;
        }

祝你好运，

Breeze

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