wpf 對控件進行截圖，獲取快照

有時候咱們項目，在執行某個操做後，會生成一些數據結果，如報表一類的東西，咱們須要對結果進行保存，甚至是生成word文檔。

那麼首先獲取到控件快照就最基本的條件。

生成快照的靜態方法類

using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Media.Imaging; namespace MvvmFuncationApp.Model { public static class ToBitmapTool { /// <summary>
        /// 截圖轉換成bitmap /// </summary>
        /// <param name="element"></param>
        /// <param name="width">默認控件寬度</param>
        /// <param name="height">默認控件高度</param>
        /// <param name="x">默認0</param>
        /// <param name="y">默認0</param>
        /// <returns></returns>
        public static Bitmap ToBitmap(this FrameworkElement element, int width = 0, int height = 0, int x = 0, int y = 0) { if (width == 0) width = (int)element.ActualWidth; if (height == 0) height = (int)element.ActualHeight; var rtb = new RenderTargetBitmap(width, height, x, y, System.Windows.Media.PixelFormats.Default); rtb.Render(element); var bit = BitmapSourceToBitmap(rtb); //測試代碼
            DirectoryInfo d = new DirectoryInfo(System.IO.Path.Combine(Directory.GetCurrentDirectory(), "Cache")); if (!d.Exists) d.Create(); bit.Save(System.IO.Path.Combine(d.FullName, "控件截圖.png")); return bit; } /// <summary>
        /// BitmapSource轉Bitmap /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static Bitmap BitmapSourceToBitmap(this BitmapSource source) { return BitmapSourceToBitmap(source, source.PixelWidth, source.PixelHeight); } /// <summary>
        /// Convert BitmapSource to Bitmap /// </summary>
        /// <param name="source"></param>
        /// <returns></returns>
        public static Bitmap BitmapSourceToBitmap(this BitmapSource source, int width, int height) { Bitmap bmp = null; try { PixelFormat format = PixelFormat.Format24bppRgb; /*set the translate type according to the in param(source)*/
                switch (source.Format.ToString()) { case "Rgb24": case "Bgr24": format = PixelFormat.Format24bppRgb; break; case "Bgra32": format = PixelFormat.Format32bppPArgb; break; case "Bgr32": format = PixelFormat.Format32bppRgb; break; case "Pbgra32": format = PixelFormat.Format32bppArgb; break; } bmp = new Bitmap(width, height, format); BitmapData data = bmp.LockBits(new System.Drawing.Rectangle(System.Drawing.Point.Empty, bmp.Size), ImageLockMode.WriteOnly, format); source.CopyPixels(Int32Rect.Empty, data.Scan0, data.Height * data.Stride, data.Stride); bmp.UnlockBits(data); } catch { if (bmp != null) { bmp.Dispose(); bmp = null; } } return bmp; } } }

 

添加按鈕事件：

 private void BitMapBtn_Click(object sender, RoutedEventArgs e) {
　　　　　　　// StudentInfoGrid =======>控件的名稱

　　　　　　 ToBitmapTool.ToBitmap(StudentInfoGrid); }
　　　　 }

前臺代碼：

<Grid Background="Gray" Name="StudentInfoGrid">
        <Label Content="學號" Height="28" HorizontalAlignment="Left" Margin="54,23,0,0" Name="labelStudentId" VerticalAlignment="Top" />
        <TextBox Text="{Binding Student.StudentId}" IsReadOnly="True" Height="23" HorizontalAlignment="Right" Margin="0,27,289,0" Name="textBoxStudentId" VerticalAlignment="Top" Width="120" />
        <Label Content="姓名" Height="28" HorizontalAlignment="Left" Margin="54,61,0,0" Name="labelStudentName" VerticalAlignment="Top" />
        <TextBox Text="{Binding Student.StudentName}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,65,0,0" Name="textBoxStudentName" VerticalAlignment="Top" Width="120" />
        <Label Content="年齡" Height="28" HorizontalAlignment="Left" Margin="54,94,0,0" Name="labelStudentAge" VerticalAlignment="Top" />
        <TextBox Text="{Binding Student.StudentAge}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,99,0,0" Name="textBoxStudentAge" VerticalAlignment="Top" Width="120" />
        <Label Content="Email" Height="28" HorizontalAlignment="Left" Margin="50,138,0,0" Name="labelStudentEmail" VerticalAlignment="Top" />
        <TextBox Text="{Binding Student.StudentEmail}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,141,0,0" Name="textBoxStudentEmail" VerticalAlignment="Top" Width="120" />
        <Label Content="性別" Height="28" HorizontalAlignment="Left" Margin="57,176,0,0" Name="labelStudentSex" VerticalAlignment="Top" />
        <TextBox Text="{Binding Student.StudentSex}" IsReadOnly="True" Height="23" HorizontalAlignment="Left" Margin="94,180,0,0" Name="textBoxStudentSex" VerticalAlignment="Top" Width="120" />
        <Button Command="{Binding ShowCommand}" Content="顯示" Height="23" HorizontalAlignment="Left" Margin="345,27,0,0" Name="buttonShow" VerticalAlignment="Top" Width="75" />
        <Button Content="控件截圖" Name="BitMapBtn" Click="BitMapBtn_Click" Width="60" Height="30" Margin="0,30"></Button>
    </Grid>

運行程序 ==》進入項目的debug目錄下