如何將Silverlight datgrid轉換爲PDF？

Question

如何將Silverlight的datogrid轉換爲PDF？

Answer 1

我發現Silverlight的silverlightpdf和silverpdf兩個優秀的PDF庫..

Answer 2

這裏是一套方法，這將是有用的你。

public static RenderTargetBitmap ConvertToBitmap(UIElement uiElement, double resolution) 
      { 
       var scale = resolution/96d; 
       uiElement.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity)); 
       var sz = uiElement.DesiredSize; 
       var rect = new Rect(sz); 
       uiElement.Arrange(rect); 
       var bmp = new RenderTargetBitmap((int)(scale * (rect.Width)), (int)(scale * (rect.Height)), scale * 96, scale * 96, PixelFormats.Default); 
       bmp.Render(uiElement); 
       return bmp; 
      } 

    public static string CreatePDF(RenderTargetBitmap bitmap) 
      { 
       var jpegString = GridImageConverter.CreateJpeg(bitmap); 
       var stringBuilder = new StringBuilder(); 
       stringBuilder.AppendFormat(
        @"%PDF-1.4 
    %"); 
       stringBuilder.AppendFormat("\u00e2\u00e3\u00cf\u00d3\n"); 
       stringBuilder.AppendFormat(@"1 0 obj 
    <</Type/Catalog/Pages 2 0 R>> 
    endobj 
    2 0 obj 
    <</Type/Pages/Kids[3 0 R]/Count 1>> 
    endobj 
    3 0 obj 
    <</Type/Page/Parent 2 0 R/MediaBox[0 0 {0} {1}]/Contents 4 0 R/Resources<</XObject<</Im0 5 0 R>>>>>> 
    endobj 
    ", (int)(bitmap.Width * 0.75), (int)(bitmap.Height * 0.75)); 
       int obj4Offset = stringBuilder.Length; 
       stringBuilder.AppendFormat(
        @"4 0 obj 
    <</Length 27>>stream 
    {0} 0 0 {1} 0 0 cm 
    /Im0 Do 
    endstream 
    endobj 
    ", (int)(bitmap.Width * 0.75), (int)(bitmap.Height * 0.75)); 
       int obj5Offset = stringBuilder.Length; 
       stringBuilder.AppendFormat(
        @"5 0 obj 
    <</Length {2}/Filter/DCTDecode/Type/XObject/Subtype/Image/Width {0}/Height {1}/ColorSpace/DeviceRGB/BitsPerComponent 8>>stream 
    {3} 
    endstream 
    endobj 
    ", bitmap.PixelWidth, bitmap.PixelHeight, jpegString.Length, jpegString); 
       int xrefOffset = stringBuilder.Length; 
       stringBuilder.AppendFormat(
        @"xref 
    1 5 
    0000000015 00000 n 
    0000000064 00000 n 
    0000000118 00000 n 
    0000000{0} 00000 n 
    0000000{1} 00000 n 
    trailer 
    <</Size 6/Root 1 0 R>> 
    startxref 
    {2} 
    %%EOF 
    ", obj4Offset, obj5Offset, xrefOffset); 

       return stringBuilder.ToString(); 
      } 

      public static void SaveToPDF(UIElement uiElement, string filePath, double resolution) 
      { 
       SaveToPDF(ConvertToBitmap(uiElement, resolution), filePath); 
      } 

      public static void SaveToPDF(RenderTargetBitmap bmp, string filePath) 
      { 
       if (filePath != null) 
       { 
        try 
        { 
         using (var fileStream = File.Create(filePath)) 
         { 
          using (var streamWriter = new StreamWriter(fileStream, Encoding.Default)) 
          { 
           streamWriter.Write(CreatePDF(bmp)); 
           streamWriter.Close(); 
          } 
          fileStream.Close(); 
         } 
        } 
        catch(Exception ex) 
        { 
         //handle exception here 
        } 
       } 
      }