插入一个base64位图到rtf中

我有一个从签名捕获中捕获的图像。 sig cap返回图像的base64字符串。插入一个base64位图到rtf中

我想创建一个rtf文件字符串与它里面的这个图像从JavaScript。

在这里我有什么：

var datapair = $sigdiv.jSignature("getData");

它返回（因为缩短长SO张贴）：

["data:image/png;base64,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"]

我然后我试图形成具有以下字符串的RTF文档。

string rtf = @"{\rtf1\ansi{\fonttbl\f0\fswiss Helvetica;}\f0\pard "; 
      rtf += picture; 
      rtf += " }"; 
      return rtf;

凡图片（缩短，因为长期张贴在SO）：

var imageData = "iVBORw0KGgoAAAANSUhEUgAABNMAAAE2CAYAAABLINTeAAAgAElEQVR4Xu3dC9A1ZX0YcMOHYlEI0GhMk9EPiLU6NULEptUqL0irphb5IB0ZIxeVljEtl6ixM5kAH5dMR8dLwMY28cIltdgIcnHUdtTwUmsTdUCZxNRqlA9jvTSZfp/FCyKX/v961i7Led93z3nP2bPP7u/M/OfsOWd3n//ze5b3fOfPs7s/8QgPAgQIECBAgAABAgQIECBAgAABAgRaCfxEq7WsRIAAAQIECBAgQIAAAQIECBAgQIDAIxTTHAQECBAgQIAAAQIECBAgQIAAAQIEWgooprWEshoBAgQIECBAgAABAgQIECBAgAABxTTHAAECBAgQIECAAAECBAgQIECAAIGWAoppLaGsRoAAAQIECBAgQIAAAQIECBAgQEAxzTFAgAABAgQIECBAgAABAgQIECBAoKWAYlpLKKsRIECAAAECBAgQIECAAAECBAgQUExzDBAgQIAAAQIECBAgQIAAAQIECBBoKaCY1hLKagQIECBAgAABAgQIECBAgAABAgQU0xwDBAgQIECAAAECBAgQIECAAAECBFoKKKa1hLIaAQIECBAgQIAAAQIECBAgQIAAAcU0xwABoJjWMbjmCBAgQIAAAQIECBAgQIAAAQIEyhVQTCt37GROgAABAgQIECBAgAABAgQIECDQsYBiWsfgmiNAgAABAgQIECBAgAABAgQIEChXQDGt3LGTOQECBAgQIECAAAECBAgQIECAQMcCimkdg2uOAAECBAgQIECAAAECBAgQIECgXAHFtHLHTuYECBAgQIAAAQIECBAgQIAAAQIdCyimdQyuOQIECBAgQIAAAQIECBAgQIAAgXIFFNPKHTuZEyBAgAABAgQIECBAgAABAgQIdCygmNYxuOYIECBAgAABAgQIECBAgAABAgTKFVBMK3fsZE6AAAECBAgQIECAAAECBAgQINCxgGJax+CaI0CAAAECBAgQIECAAAECBAgQKFdAMa3csZM5AQIECBAgQIAAAQIECBAgQIBAxwKKaR2Da44AAQIECBAgQIAAAQIECBAgQKBcAcW0csdO5gQIECBAgAABAgQIECBAgAABAh0L/D9S+8lzAOsdUQAAAABJRU5ErkJggg=="; 
var picture = "{\pict\pngblip\picw1693\pich1693\picwgoal960\pichgoal960" + imagedata;

我那么字符串赋值给一个格式文本框（样本WinForms应用程序，我只是想证明rtf文件有效）。显示

this.richTextBox1.Rtf = rtf;

没什么=（

来源

2012-12-12 Toby Holland

在看http://stackoverflow.com/questions/1490734/programatically-adding-images-to-rtf-document和链接http://stackoverflow.com/questions/542850/how-cani-i- insert-an-image-into-a-richtextbox很明显数据必须是**十六进制编码**而不是base64。 –

我看到两个主要问题与你正在尝试做的。首先，RTF需要媒体是十六进制编码，而不是Base64编码。因此，首先你的图像数据转换成。一个十六进制字符串然后，你需要改变你如何建立你的RTF画面的微小变化，但它应该有所作为更改变种图片如下：。

var picture = "{\pict\picw1693\pich1693\picwgoal960\pichgoal960\pngblip" + imagedata;

\ pngblip就是告诉RTF阅读器图片数据即将到来

来源

2013-07-01 14:20:49 Th3BFG

插入一个base64位图到rtf中

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