关于WPF StackPanel

Question

我想将它的四个角变成圆角要怎么办呢？

Answer 1

更正一下：我是想StackPanel的右下角变成圆角~

Answer 2

以前我在SL中做过让文本框变成圆角的样式。思想是在TextBox外层设一个Boder,然后将Boder的CornerRadius属性设置为5，就是圆角的程度值，Border默认宽度是0，要开改一下。文本框的边框不显示。这样看起来就像是一个圆角的文本框了。当时我做的是一个多行输入框，很大的，所以能看出效果。

Answer 3

<control:ClippingBorder CornerRadius="20">
    <StackPanel Background="Yellow">
        <Label>Hello World</Label>
    </StackPanel>
</control:ClippingBorder>
ClippingBorder.csusing System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows;namespace Shgbit.Controls {
/// <Res>
///     As a side effect ClippingBorder will surpress any databinding or animation of 
///         its childs UIElement.Clip property until the child is removed from ClippingBorder
/// </Res>
public class ClippingBorder : Border {
protected override void OnRender(DrawingContext dc) {
OnApplyChildClip();
base.OnRender(dc);
} public override UIElement Child {
get {
return base.Child;
}
set {
if (this.Child != value) {
if (this.Child != null) {
// Restore original clipping
this.Child.SetValue(UIElement.ClipProperty, _oldClip);
} if (value != null) {
_oldClip = value.ReadLocalValue(UIElement.ClipProperty);
} else {
// If we dont set it to null we could leak a Geometry object
_oldClip = null;
} base.Child = value;
}
}
} protected virtual void OnApplyChildClip() {
UIElement child = this.Child;
if (child != null) {
_clipRect.RadiusX = _clipRect.RadiusY = Math.Max(0.0, this.CornerRadius.TopLeft - (this.BorderThickness.Left * 0.5));
Rect rect = new Rect(this.RenderSize);
rect.Height -= (this.BorderThickness.Top + this.BorderThickness.Bottom);
rect.Width -= (this.BorderThickness.Left + this.BorderThickness.Right);
_clipRect.Rect = rect;
child.Clip = _clipRect;
}
} public void Update() { OnApplyChildClip(); } private RectangleGeometry _clipRect = new RectangleGeometry();
private object _oldClip;
}
}

Answer 4

 _clipRect.RadiusX = _clipRect.RadiusY = Math.Max(0.0, this.CornerRadius.TopLeft - (this.BorderThickness.Left * 0.5));
通过Rect做不了右下角圆角，这个需要你自己做个Path,然后用来做Clip

Answer 5

这个需要你自己做个Path,然后用来做Clip
可以写个伪代码给我看看么？看接触WPF不久

Answer 6

我已经画好一个Path，下一步呢？

Answer 7

<Path Stroke="Blue">
<Path.Data>
<PathGeometry>
<PathGeometry.Figures>
<PathFigure StartPoint="0,0" IsClosed="True">
<LineSegment Point="300,0" />
<LineSegment Point="300,80" />
<ArcSegment Point="280,100" Size="20,20" SweepDirection="Clockwise"/>
<LineSegment Point="0,100" />
</PathFigure>
</PathGeometry.Figures>
</PathGeometry>
</Path.Data>
</Path>

Answer 8

something like below:<Border Width="300" Height="100">
    <Border.Clip>
        <PathGeometry>
            <PathGeometry.Figures>
                <PathFigure StartPoint="0,0" IsClosed="True">
                    <LineSegment Point="300,0" />
                    <LineSegment Point="300,80" />
                    <ArcSegment Point="280,100" Size="20,20" SweepDirection="Clockwise"/>
                    <LineSegment Point="0,100" />
                </PathFigure>
            </PathGeometry.Figures>
        </PathGeometry>
    </Border.Clip>
    <StackPanel Background="Yellow">
        <Label>Hello World</Label>
    </StackPanel>
</Border>

Answer 9

十分感谢
但是我的这个没有效果
<Border  BorderBrush="Red" BorderThickness="5" >
        <Border.Clip>
            <PathGeometry>
                <PathGeometry.Figures>
                    <PathFigure StartPoint="50,50">
                        <LineSegment Point="50,100"></LineSegment>
                    </PathFigure>
                    <PathFigure StartPoint="50,50">
                        <LineSegment Point="100,50"></LineSegment>
                    </PathFigure>
                    <PathFigure StartPoint="50,100">
                        <LineSegment Point="90,100"></LineSegment>
                    </PathFigure>
                    <PathFigure StartPoint="100,50">
                        <LineSegment Point="100,90"></LineSegment>
                    </PathFigure>
                    <PathFigure StartPoint="100,90">
                        <ArcSegment Point="100,90" IsLargeArc="False" SweepDirection="Counterclockwise" Size="10,10"/>
                    </PathFigure>
                </PathGeometry.Figures>
            </PathGeometry>                         
        </Border.Clip>
        <StackPanel Background="Yellow">        </StackPanel>
    </Border>