silverlight 将chart图倒入到excel

mainpage.xaml

 <Grid x:Name="LayoutRoot" Background="White">
            <StackPanel Orientation="Vertical" >
            <Button Content="Export to Excel" Height="23" HorizontalAlignment="Left" x:Name="button1" VerticalAlignment="Top" Width="150" Click="button1_Click" />
            <toolkit:Chart HorizontalAlignment="Left" Name="chart1" Title="Line Chart" VerticalAlignment="Top" Height="300" Width="640" >
            </toolkit:Chart>
        </StackPanel>
    </Grid>

后台

 public MainPage()
        {
            InitializeComponent();
            this.Loaded += new RoutedEventHandler(UserControl_Loaded); ;
        }
        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            ObservableCollection<EmployeePoints> empPoints = new ObservableCollection<EmployeePoints>()
            { 
                new EmployeePoints() { Name = "John", Points = 10 }, 
                new EmployeePoints() { Name = "Sam", Points = 40 },
                new EmployeePoints() { Name = "Mary", Points = 80 }, 
                new EmployeePoints() { Name = "Pierce", Points = 60 }, 
                new EmployeePoints() { Name = "Paul", Points = 70 }, 
            };
            LineSeries columnSeries = new LineSeries();//实例化一个Series:

            //注意ColumnSeries所在命名空间   

            //为：using System.Windows.Controls.DataVisualization.Charting;


            columnSeries.ItemsSource = empPoints;  //设置数据源
            columnSeries.DependentValueBinding = new Binding("Points");       //后台进行数据绑定         
            columnSeries.IndependentValueBinding = new Binding("Name");
            //columnSeries.Title = "";

            chart1.Series.Add(columnSeries);//为Chart绑定“显示类型”



        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            WriteableBitmap bitmap = new WriteableBitmap(640, 300);
            bitmap.Render(chart1, null);
            bitmap.Invalidate();


            // open file dailog for selecting export file
            SaveFileDialog sDialog = new SaveFileDialog();
            sDialog.Filter = "Excel Files(*.xls)|*.xls";

            if (sDialog.ShowDialog() == true)
            {
                // create a workbook object
                Workbook workbook = new Workbook();
                //Create a worksheet object 
                Worksheet worksheet1 = new Worksheet("SheetWithImage");

                // creat a spreadsheet picture object
                Lite.ExcelLibrary.SpreadSheet.Picture pic = new Lite.ExcelLibrary.SpreadSheet.Picture();
                //set its image property from silverlight image control
                // image formates 0xF01E=png,0xF01D=jpeg
                //ImageTranslator.TranslateImageToBytes translate an image control to byte array
                // that will be used by excel picture object to plot picture in excel file.
                System.Windows.Controls.Image image = new System.Windows.Controls.Image();
                image.Source = bitmap;
                image.Name = "imgExport";
                image.Width = 640;
                image.Height = 300;
                image.Stretch = Stretch.Fill;
                pic.Image = new Lite.ExcelLibrary.SpreadSheet.Image(ImageTranslator.TranslateImageToBytes(image), 0xF01E);

                //set picture size
                pic.TopLeftCorner = new CellAnchor(1, 1, 10, 10);
                pic.BottomRightCorner = new CellAnchor(8, 5, 10, 10);
                // add picture to spreadsheet
                worksheet1.AddPicture(pic);
                /// add worksheet to workbook
                workbook.Worksheets.Add(worksheet1);
                // get the stream of selected file
                Stream sFile = sDialog.OpenFile();
                // save excel file 
                workbook.Save(sFile);
            }
        }


        public class EmployeePoints
        {
            public string Name { get; set; }
            public int Points { get; set; }
        }
    }

用到了工具       Lite Excel Binaries

下载地址：http://excellite.codeplex.com/

The source from http://sreeharip.wordpress.com/2011/12/04/exporting-a-silverlight-chart-to-excel-in-browser/