Programmatically adding Images to RTF Document

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try these links

  • Rich Text Format (RTF) Specification, version 1.6
  • How can I insert an image into a RichTextBox?
  • Insert Image into rtf document

you must change “picwgoa” to “picwgoal” and “pichgoa” to “pichgoal”

string mpic = @"{\pict\pngblip\picw" + 
    img.Width.ToString() + @"\pich" + img.Height.ToString() +
    @"\picwgoal" + width.ToString() + @"\pichgoal" + height.ToString() + 
    @"\bin " + str + "}";

Here you have a list of the supported image formats

\emfblip      Source of the picture is an EMF (enhanced metafile).
\pngblip      Source of the picture is a PNG.
\jpegblip     Source of the picture is a JPEG.
\shppict      Specifies a Word 97-2000 picture. This is a destination control word.
\nonshppict   Specifies that Word 97-2000 has written a {\pict destination that it will not read on input. This keyword is for compatibility with other readers.
\macpict      Source of the picture is QuickDraw.
\pmmetafileN  Source of the picture is an OS/2 metafile. The N argument identifies the metafile type. The N values are described in the \pmmetafile table below.
\wmetafileN   Source of the picture is a Windows metafile. The N argument identifies the metafile type (the default is 1).
\dibitmapN    Source of the picture is a Windows device-independent bitmap. The N argument identifies the bitmap type (must equal 0).The information to be included in RTF from a Windows device-independent bitmap is the concatenation of the BITMAPINFO structure followed by the actual pixel data.    
\wbitmapN     Source of the picture is a Windows device-dependent bitmap. The N argument identifies the bitmap type (must equal 0).The information to be included in RTF from a Windows device-dependent bitmap is the result of the GetBitmapBits function.

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