Merge pull request #463 from telerik/new-kb-convert-wmf-to-png-radwordsprocessing-85cc741356324f489626473853158122

Added new kb article convert-wmf-to-png-radwordsprocessing

Author: dessyordanova

knowledge-base/convert-wmf-to-png-radwordsprocessing.md

@@ -0,0 +1,97 @@
+---
+title: Converting WMF Images to PNG in RTF Documents with RadWordsProcessing
+description: Learn how to programmatically convert WMF images to PNG within RTF files using RadWordsProcessing.
+type: how-to
+page_title: How to Convert WMF to PNG in RTF Files Using Telerik Document Processing
+slug: convert-wmf-to-png-radwordsprocessing
+tags: wordsprocessing, rtf, wmf, png, document, processing, image, conversion
+res_type: kb
+ticketid: 1662500
+---
+
+## Environment
+
+| Version | Product | Author | 
+| --- | --- | ---- | 
+| 2024.3.806| RadWordsProcessing|[Desislava Yordanova](https://www.telerik.com/blogs/author/desislava-yordanova)| 
+
+## Description
+
+This article demonstrates a sample approach how to convert the images in WMF format to PNG within an [RTF]({%slug radwordsprocessing-formats-and-conversion-rtf%}) document.
+
+## Solution
+
+To convert WMF images to PNG format within an RTF document using RadWordsProcessing, follow these steps:
+
+1. [Import the RTF file](https://docs.telerik.com/devtools/document-processing/libraries/radwordsprocessing/formats-and-conversion/rtf/rtfformatprovider#import) as a `RadFlowDocument`.
+
+2. Iterate through the [floating images]({%slug radwordsprocessing-model-floatingimage%}) in the document.
+
+3. Convert each WMF image to PNG format.
+
+4. [Export the modified document](https://docs.telerik.com/devtools/document-processing/libraries/radwordsprocessing/formats-and-conversion/rtf/rtfformatprovider#export).
+
+Here is a sample code snippet demonstrating this process:
+
+```csharp
+using System.Diagnostics;
+using Telerik.Windows.Documents.Flow.Model;
+using Telerik.Windows.Documents.Flow.Model.Shapes;
+using Telerik.Windows.Documents.Media;
+
+static void Main(string[] args)
+{
+    string inputFilePath = "yourfile.rtf";
+    Telerik.Windows.Documents.Flow.Model.RadFlowDocument document;
+
+    Telerik.Windows.Documents.Flow.FormatProviders.Rtf.RtfFormatProvider provider = new Telerik.Windows.Documents.Flow.FormatProviders.Rtf.RtfFormatProvider();
+
+    using (Stream input = File.OpenRead(inputFilePath))
+    {
+        document = provider.Import(input);
+    }
+
+    ConvertInlineWmfImagesToPng(document);
+
+    string outputFilePath = "converted.rtf";
+    File.Delete(outputFilePath);
+    using (Stream output = File.Create(outputFilePath))
+    {
+        provider.Export(document, output);
+    }
+    Process.Start(new ProcessStartInfo() { FileName = outputFilePath, UseShellExecute = true });
+}
+
+private static void ConvertInlineWmfImagesToPng(RadFlowDocument document)
+{
+    foreach (FloatingImage image in document.EnumerateChildrenOfType<FloatingImage>())
+    {
+        if (image.Image.ImageSource.Extension.Equals("wmf", StringComparison.InvariantCultureIgnoreCase))
+        {
+            using (MemoryStream wmfImageStream = new MemoryStream(image.Image.ImageSource.Data))
+            {
+                using (MemoryStream pngImageStream = new MemoryStream())
+                {
+                    var imageDrawing = System.Drawing.Image.FromStream(wmfImageStream);
+                    imageDrawing.Save(pngImageStream, System.Drawing.Imaging.ImageFormat.Png);
+                    byte[] pngBytes = pngImageStream.ToArray();
+
+                    image.Image.ImageSource = new ImageSource(pngBytes, "png");
+                }
+            }
+        }
+    }
+}
+```
+
+### Notes
+
+- Ensure you have referenced all necessary assemblies and namespaces, particularly those related to Telerik Document Processing and System.Drawing for image conversion.
+- The code snippet assumes the presence of a WMF image in the document. If your document contains images in formats other than WMF, they won't be affected.
+- This solution applies to floating images. For inline images, a similar approach can be taken with slight adjustments to target [InlineImage]({%slug radwordsprocessing-model-imageinline%}) instances if necessary.
+
+## See Also
+
+- [RadWordsProcessing Documentation]({%slug radwordsprocessing-overview%})
+- [RadFlowDocument Overview]({%slug radwordsprocessing-model-radflowdocument%})
+- [RtfFormatProvider Documentation]({%slug radwordsprocessing-formats-and-conversion-rtf-rtfformatprovider%})

libraries/radwordsprocessing/model/floatingimage.md

@@ -167,3 +167,4 @@ WordsProcessing enables you to export documents with floating images to PDF. How
  * [Document model]({%slug radwordsprocessing-model%})
  * [ImageInline]({%slug radwordsprocessing-model-imageinline%})
  * [Paragraph]({%slug radwordsprocessing-model-paragraph%})
+ * [Converting WMF Images to PNG in RTF Documents with RadWordsProcessing]({%slug convert-wmf-to-png-radwordsprocessing%})

libraries/radwordsprocessing/model/imageinline.md

@@ -143,3 +143,4 @@ This section explains the behavior of the __Size__ property of The __Image__ obj
  * [Document model]({%slug radwordsprocessing-model%})
  * [FloatingImage]({%slug radwordsprocessing-model-floatingimage%})
  * [Paragraph]({%slug radwordsprocessing-model-paragraph%})
+ * [Converting WMF Images to PNG in RTF Documents with RadWordsProcessing]({%slug convert-wmf-to-png-radwordsprocessing%})