我有一个Base64编码的图像，如下所示：
var base64SignatureImage = 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使用Word Automation API，如何将其作为图片插入到内存中的Word文档中？
最好不使用系统剪贴板或从文件插入。
从base64插入图形的唯一可能性是使用Word Open XML。
为了通过API进行此操作，您需要以OPC平面文件格式生成有效的Word Open XML。可以使用Range.InsertXML方法将其插入到Word应用程序中打开的文档中。
确定有效的Word Open XML是最简单的方法是使用Range.WordOpenXML属性将其写出为字符串。例如，将图像插入为InlineShape，然后Document.InlineShapes[index].Range.WordOpenXML;
或者，使用VBA编辑器中的立即窗口并将其写入文档中的当前选择：
Selection.Text = ActiveDocument.InlineShapes(1).Range.WordOpenXML
然后按Enter。
您应该在XML中将图像视为base64。
这将生成完整，完整的Word Open XML，您可以“按原样”使用它，替换base64（并可能调整大小属性）。但是，InsertXML并不需要所有这些。如果您想对其进行精简或了解更多有关最新情况的信息，本文将介绍最低要求，并提供更多背景信息：
https://msdn.microsoft.com/zh-CN/library/office/dn423225.aspx
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我来说两句