silverlight给ScrollViewer滚动条添加响应鼠标滚轮

概述1）前台代码 <UserControl x:Class="SilverlightApplication54.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xml

1）前台代码

<UserControl x:Class="SilverlightApplication54.MainPage"    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"    xmlns:d="http://schemas.microsoft.com/Expression/blend/2008"    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"    mc:Ignorable="d"    d:DesignHeight="300" d:DesignWIDth="400">    <GrID x:name="LayoutRoot" Background="White">        <GrID.RowDeFinitions>            <RowDeFinition Height="50"></RowDeFinition>            <RowDeFinition Height="*"></RowDeFinition>        </GrID.RowDeFinitions>        <button name="Testbutton" WIDth="200" Height="24" Content="Add" GrID.Row="0"></button>        <ScrollVIEwer name="TestScrollVIEwer" GrID.Row="1">            <StackPanel name="TestStackPanel" OrIEntation="Vertical">            </StackPanel>        </ScrollVIEwer>    </GrID></UserControl>

2）后台代码

using System;using System.Collections.Generic;using System.linq;using System.Net;using System.windows;using System.windows.Controls;using System.windows.documents;using System.windows.input;using System.windows.Media;using System.windows.Media.Animation;using System.windows.Shapes;namespace SilverlightApplication54{    public partial class MainPage : UserControl    {        public MainPage()        {            InitializeComponent();            Testbutton.Click += new RoutedEventHandler(Testbutton_Click);            this.MouseWheel += new MouseWheelEventHandler(MainPage_MouseWheel);        }        /// <summary>        /// 当鼠标滚轮时，ScrollVIEwer的滚动条就能就能上下移动了。        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        voID MainPage_MouseWheel(object sender,MouseWheelEventArgs e)        {            ScrollVIEwer vIEwer = TestScrollVIEwer;            if (vIEwer == null)                return;            double num = Math.Abs((int)(e.Delta / 2));            double offset = 0.0;            if (e.Delta > 0)            {                offset = Math.Max((double)0.0,(double)(vIEwer.VerticalOffset - num));            }            else            {                offset = Math.Min(vIEwer.ScrollableHeight,vIEwer.VerticalOffset + num);            }            if (offset != vIEwer.VerticalOffset)            {                vIEwer.ScrollToVerticalOffset(offset);                e.Handled = true;            }        }        voID Testbutton_Click(object sender,RoutedEventArgs e)        {            //添加TextBox            TextBox textBox = new TextBox();            textBox.WIDth = 200;            textBox.Height = 100;            TestStackPanel.Children.Add(textBox);        }    }}

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