wpf 分别用 xaml 和后台代码实现 色彩渐变

xaml 方法：

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid x:Name="grid1">
        <!--xaml中设置渐变效果-->

        <!--<Grid.Background>
            <LinearGradientBrush>
                <GradientStopCollection>
                    <GradientStop Offset="0" Color="Black" />
                    <GradientStop Offset="0.6" Color="white"  />
                </GradientStopCollection>
            </LinearGradientBrush>
        </Grid.Background>-->
    </Grid>
</Window>

后台方法：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApplication1
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            LinearGradientBrush brush = new LinearGradientBrush();
            brush.GradientStops.Add(new GradientStop(color:Colors.Black,offset:0));
            brush.GradientStops.Add(new GradientStop(color: Colors.White, offset: 0.6));
            grid1.Background = brush;
        }
    }
}

vb.net的后台代码：

        Dim brush As New LinearGradientBrush
        brush.GradientStops.Add(New GradientStop With{.Offset=0,.Color=Colors.Black})
        brush.GradientStops.Add(New GradientStop With{.Offset=0.6,.Color=Colors.wHILE})
        grid1.BackGround=brush