原文:

1、使用Boder(一般情况):

设置CornerRadius属性

 <Border x:Name="border" CornerRadius="20">

...

</Border>

 

2、创建ClippingBorder类：

using 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 {    /// 
      
           ///     As a side effect ClippingBorder will surpress any databinding or animation of     ///         its childs UIElement.Clip property until the child is removed from ClippingBorder    /// 
          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;    }}

用法：

需应用xmlns:control="你的命名空间"

         
              
       Hello World    
      
     

 

3、使用Clip(通过路径):

         
              
                   
                        
                             
                              
                              
                              
                          
                     
                
           
          
              
       Hello World