Windows 8实用窍门系列：14.windows 8中粘贴板(剪切板)的使用

　　在Windows 8中我们的粘贴板分别保存4种信息：文本、图片、网页、文件。在本文中我们将分别复制和粘贴这4种元素，当然你也可以在外部复制这4种元素，然后在程序中粘贴出来。

　　DataPackage：包含用户希望与另一个应用程序交换的数据

          //设置一个中转变量保存用户的值
       DataPackage dp = new DataPackage();

　　第一：我们来看看复制和粘贴文本的后台处理代码。

        //<!--复制文本-->
        private void CopyText_Click(object sender, RoutedEventArgs e)
        {
            dp.SetText(this.SourceText.Text);
            Clipboard.SetContent(dp);
        }
        //<!--粘贴文本-->
        private async void PasteText_Click(object sender, RoutedEventArgs e)
        {
            var ClipBoardData = Clipboard.GetContent();
            if (ClipBoardData.Contains(StandardDataFormats.Text))
            {
                this.TargetText.Text = await ClipBoardData.GetTextAsync();
            }
        }

　　第二：复制和粘贴图片后台处理代码

        //<!--复制图片-->
        private async void CopyImage_Click(object sender, RoutedEventArgs e)
        {
            Uri uri = new Uri("ms-appx:///Assets/iphone0426_006.jpg");
            StorageFile file = await StorageFile.GetFileFromApplicationUriAsync(uri);
            dp.SetBitmap(RandomAccessStreamReference.CreateFromFile(file));
            Clipboard.SetContent(dp);
        }
        //<!--粘贴图片-->
        private async void PasteImage_Click(object sender, RoutedEventArgs e)
        {
            var ClipBoardData = Clipboard.GetContent();
            if (ClipBoardData.Contains(StandardDataFormats.Bitmap))
            {
                RandomAccessStreamReference img = await ClipBoardData.GetBitmapAsync();
                var imgstream = await img.OpenReadAsync();
                BitmapImage bitmap = new BitmapImage();
                bitmap.SetSource(imgstream);
                this.TargetImage.Source = bitmap;
            }
        }

　　第三：复制和粘贴HTML的后台处理代码

        //<!--复制HTML-->
        private void CopyHtml_Click(object sender, RoutedEventArgs e)
        {
            string html = HtmlFormatHelper.CreateHtmlFormat(this.SourceHtml.InvokeScript("eval", 
                new string[] { "document.documentElement.outerHTML;" }));
            dp.SetHtmlFormat(html);
            Clipboard.SetContent(dp);
        }
        //<!--粘贴HTML-->
        private async void PasteHtml_Click(object sender, RoutedEventArgs e)
        {
            var ClipBoardData = Clipboard.GetContent();
            if (ClipBoardData.Contains(StandardDataFormats.Html))
            {
                string html = await ClipBoardData.GetHtmlFormatAsync();
                this.TargetHtml.NavigateToString(html);
            }
        }

　　第四：复制和粘贴文件的后台处理代码

        //<!--复制文件-->
        private async void CopyFile_Click(object sender, RoutedEventArgs e)
        {
            Uri uri1 = new Uri("ms-appx:///Assets/iphone0426_006.jpg");
            StorageFile file1 = await StorageFile.GetFileFromApplicationUriAsync(uri1);
            Uri uri2 = new Uri("ms-appx:///Assets/iphone0426_010.jpg");
            StorageFile file2 = await StorageFile.GetFileFromApplicationUriAsync(uri2);
            List<StorageFile> filelist = new List<StorageFile>();
            filelist.Add(file1);
            filelist.Add(file2);
            dp.SetStorageItems(filelist);
            Clipboard.SetContent(dp);
        }
        //<!--粘贴文件-->
        private async void PasteFile_Click(object sender, RoutedEventArgs e)
        {
            var ClipBoardData = Clipboard.GetContent();
            this.TargetFile.Text = "";
            if (ClipBoardData.Contains(StandardDataFormats.StorageItems))
            {
                var filelist = await ClipBoardData.GetStorageItemsAsync();
                foreach (StorageFile sfile in filelist)
                {
                    StorageFile storageFileCopy = await sfile.CopyAsync(KnownFolders.DocumentsLibrary, 
                        sfile.Name,NameCollisionOption.ReplaceExisting);
                    this.TargetFile.Text += sfile.Name + "文件粘贴一份到“库\\文档\\" + sfile.Name+"\r";
                }
            }
        }

　　第五：我们贴出前台代码如下

    <Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
        <!--复制文本-->
        <TextBox  x:Name="SourceText" HorizontalAlignment="Left" Margin="96,50,0,0"
                  TextWrapping="Wrap" Text="复制源" VerticalAlignment="Top" Width="178"/>
        <Button x:Name="CopyText" Content="复制文本" HorizontalAlignment="Left" 
                Margin="367,50,0,0" VerticalAlignment="Top" Click="CopyText_Click"/>
        <Button x:Name="PasteText" Content="粘贴文本" HorizontalAlignment="Left"
                Margin="545,50,0,0" VerticalAlignment="Top" Click="PasteText_Click"/>
        <TextBlock  x:Name="TargetText" HorizontalAlignment="Left" Margin="690,50,0,0"
                    TextWrapping="Wrap" Text="显示文本" VerticalAlignment="Top" Height="32" Width="170"/>
        <!--复制图片-->
        <Image x:Name="SourceImage" Source="Assets/iphone0426_006.jpg" Margin="96,150,0,0" 
               HorizontalAlignment="Left" VerticalAlignment="Top" Width="178" Height="178"/>
        <Button x:Name="CopyImage" Content="复制图片" HorizontalAlignment="Left"
                Margin="367,150,0,0" VerticalAlignment="Top" Click="CopyImage_Click"/>
        <Button x:Name="PasteImage" Content="粘贴图片" HorizontalAlignment="Left"
                Margin="545,150,0,0" VerticalAlignment="Top" Click="PasteImage_Click"/>
        <Image x:Name="TargetImage" HorizontalAlignment="Left" Margin="690,150,0,0"
               VerticalAlignment="Top"  Width="170" Height="170"/>
        <!--复制HTML-->
        <WebView x:Name="SourceHtml" HorizontalAlignment="Left" Source="http://wap.easou.com/"
                 Margin="96,350,0,0"  VerticalAlignment="Top" Width="266" Height="278"/>
        <Button x:Name="CopyHtml" Content="复制HTML" HorizontalAlignment="Left" 
                Margin="367,350,0,0" VerticalAlignment="Top" Click="CopyHtml_Click"/>
        <Button x:Name="PasteHtml" Content="粘贴HTML" HorizontalAlignment="Left" 
                Margin="545,350,0,0" VerticalAlignment="Top" Click="PasteHtml_Click"/>
        <WebView x:Name="TargetHtml" HorizontalAlignment="Left" Margin="690,350,0,0" 
                 VerticalAlignment="Top" Width="270"  Height="278"/>
        <!--复制文件-->
        <Button x:Name="CopyFile" Content="复制文件" HorizontalAlignment="Left" 
                Margin="367,650,0,0" VerticalAlignment="Top" Click="CopyFile_Click"/>
        <Button x:Name="PasteFile" Content="粘贴文件" HorizontalAlignment="Left" 
                Margin="545,650,0,0" VerticalAlignment="Top" Click="PasteFile_Click"/>
        <TextBlock x:Name="TargetFile" HorizontalAlignment="Left" Margin="690,656,0,0"
                   TextWrapping="Wrap" Text="显示文件拷贝信息" VerticalAlignment="Top" Height="55" Width="450"/>
    </Grid>