小编pus*_*raj的帖子

我想知道如何以编程方式设置WPF依赖属性Viewport2DVisual3D.IsVisualHostMaterialProperty.

在xaml我会使用:

<Viewport2DVisual3D>
    <Viewport2DVisual3D.Geometry>
        <MeshGeometry3D Positions = "0,0,0 0,-30.9274,0 0,-30.9274,-24.4287 0,0,-24.4287"
                        TextureCoordinates = "0,0 0,1 1,1 1,0"
                        TriangleIndices = "0 1 2 0 2 3"/>
    </Viewport2DVisual3D.Geometry>
    <Viewport2DVisual3D.Material>
        <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"/>
    </Viewport2DVisual3D.Material>

    <Viewport2DVisual3D.Visual>
        <Grid>
            <Image Source="{StaticResource BG}"/>
        </Grid>
    </Viewport2DVisual3D.Visual>
</Viewport2DVisual3D>

但是如何在代码背后完成呢？

我正在检查这些字符串,看它们是否包含单词"hi",如果它们返回true则返回true.否则我会回复假.字符串"high up应返回false但返回true.我该如何解决这个问题？

    public static bool StartHi(string str)
    {            
        if (Regex.IsMatch(str, "hi"))
        {
            return true;
        }
        else
            return false;
    }

    static void Main(string[] args)
    {
        StartHi("hi there");    // -> true
        StartHi("hi");          // -> true
        StartHi("high up");     // -> false (returns true when i run)
    }