WPF C# Button 加載圖片，背景圖片

vs2010 

界面：

<Window x:Class="ButtonLoadIMG.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" ResizeMode="NoResize">

    <Window.Resources>
        <Style TargetType="Button" x:Key="BtnStyle1" >
            <Setter Property="Background">
                <Setter.Value>
                    <ImageBrush ImageSource="IMG/connect.png" />
                </Setter.Value>
            </Setter>
        </Style>

        <Style TargetType="Button" x:Key="BtnStyle2">
            
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate  TargetType="Button">
                        <Grid  Background="Transparent">
                            <ContentPresenter x:Name="cp1" Content="{TemplateBinding Content}" VerticalAlignment="Center" HorizontalAlignment="Center" RecognizesAccessKey="True"/>
                        </Grid>                        
                        
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter TargetName="cp1" Property="Content">
                                    <Setter.Value>
                                        <Image Source="IMG/connect.png"/>
                                    </Setter.Value>
                                </Setter>
                            </Trigger>

                            <Trigger Property="IsPressed" Value="True">
                                <Setter TargetName="cp1" Property="Content">
                                    <Setter.Value>
                                        <Image Source="IMG/talking.png"/>
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Window.Resources>
    
    <Grid >
        <Grid.RowDefinitions>
            <RowDefinition Height="150*" />
            <RowDefinition Height="150*" />
        </Grid.RowDefinitions>
        <Button  Height="100" HorizontalAlignment="Center" Margin="0" Name="btnWPF" VerticalAlignment="Center" Width="100" Style="{StaticResource BtnStyle2}" >
            <Button.Content>
                <Image Source="IMG/set.png" />               
            </Button.Content>
        </Button>

        <Button Content="ButtonCS" Grid.Row="1" Height="100" HorizontalAlignment="Center" Margin="0" Name="btnCS" VerticalAlignment="Center" Width="100"  MouseEnter="buttonCS_MouseEnter" MouseLeave="buttonCS_MouseLeave" MouseLeftButtonDown="buttonCS_MouseLeftButtonDown" PreviewMouseLeftButtonUp="btnCS_PreviewMouseLeftButtonUp">
            <Button.Background>
                <!-- <ImageBrush ImageSource="/IMG/3g05.png" Stretch="None"/> -->
                <ImageBrush x:Name="imgBtnCS"></ImageBrush>
            </Button.Background>
        </Button>
    </Grid>
</Window>

邏輯代碼：

using System;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Input;
using System.Windows.Controls;


namespace ButtonLoadIMG
{
    /// <summary>
    /// MainWindow.xaml 的交互邏輯
    /// 右擊圖片->屬性->1 複製到輸出目錄：始終複製， 2 生成操作：內容
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            LoadIMG("IMG/person.png");


            MouseButtonEventHandler mouseBtnEventHandler = new MouseButtonEventHandler(this.buttonCS_MouseLeftButtonDown);
            btnCS.AddHandler(System.Windows.Controls.Button.MouseDownEvent, mouseBtnEventHandler, true);
            //btnCS.AddHandler(System.Windows.Controls.Button.MouseDownEvent, new MouseButtonEventHandler(this.btnCS_MouseLeftButtonUp), true);            
        }


        private void LoadIMG(string strIMG)
        {
            #region 加載logo圖片
            BitmapImage bitmapImg = new BitmapImage();
            bitmapImg.BeginInit();
            bitmapImg.UriSource = new System.Uri(strIMG, UriKind.RelativeOrAbsolute); ;
            //bitmapImg.DecodePixelWidth = 200;
            bitmapImg.EndInit();
            imgBtnCS.Stretch = Stretch.Uniform;
            imgBtnCS.ImageSource = bitmapImg;
            #endregion
        }


        private void SetBtnBackgroundIMG(string strIMGPath)
        {
            #region 設置圖片
            Image img = new Image();
            BitmapImage bitmapImg = new BitmapImage();
            bitmapImg.BeginInit();
            bitmapImg.UriSource = new System.Uri(strIMGPath, UriKind.RelativeOrAbsolute); ;
            //bitmapImg.DecodePixelWidth = 200;
            bitmapImg.EndInit();
            //imgBtnCS.Stretch = Stretch.Uniform;
            img.Source = bitmapImg;
            btnCS.Content = img;
            #endregion
        }


        private void buttonCS_MouseEnter(object sender, MouseEventArgs e)
        {
            SetBtnBackgroundIMG("IMG/group.png");
        }


        private void buttonCS_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            SetBtnBackgroundIMG("IMG/ChangeGrp.png");
        }


        private void btnCS_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            SetBtnBackgroundIMG("IMG/group.png");
        }


        private void buttonCS_MouseLeave(object sender, System.Windows.Input.MouseEventArgs e)
        {
            SetBtnBackgroundIMG("IMG/person.png");
        }


        //private void btnCS_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        //{
        //    //SetBtnBackgroundIMG("IMG/group.png");
        //}
        
    }
}