WKHTMLTOPDF不呈现Base64图像 [英] WKHTMLTOPDF Not Rendering Base64 Image
本文介绍了WKHTMLTOPDF不呈现Base64图像的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有以下简单的HTML页面:
I have the following simple HTML page:
<html>
<head>
<title></title>
</head>
<body>
<div>
<img id="image" src="data:image/gif;base64,R0lGODlhFwAPAKEAAP///wAAAMzMzLi3tywAAAAAFwAPAAACQIyPqQjtD98RIVpJ66g3hgEYDdVhjThyXSA4aLq2rgp78hxlyY0/ICAIBhu/HrEEKIZUyk4R1Sz9RFEkaIHNFgAAOw==" />
</div>
</body>
</html>
我正在尝试使用以下方法获取PDF以渲染Base64编码的GIF:
I am trying to get the PDF to render the Base64 encoded GIF using the following:
public static byte[] HTMLToPDF(string htmlText)
{
Process p;
ProcessStartInfo psi = new ProcessStartInfo();
psi.FileName = HttpContext.Current.Server.MapPath("~/App_Data/wkhtmltopdf/wkhtmltopdf.exe");
// run the conversion utility
psi.UseShellExecute = false;
psi.CreateNoWindow = true;
psi.RedirectStandardInput = true;
psi.RedirectStandardOutput = true;
psi.RedirectStandardError = true;
// note: that we tell wkhtmltopdf to be quiet and not run scripts
string args = "-q -n ";
args += "--disable-smart-shrinking ";
//args += "--orientation Landscape ";
args += "--outline-depth 0 ";
args += "--page-size A4 ";
args += " - -";
psi.Arguments = args;
p = Process.Start(psi);
try
{
using (StreamWriter stdin = p.StandardInput)
{
stdin.AutoFlush = true;
stdin.Write(htmlText);
}
//read output
byte[] buffer = new byte[32768];
byte[] file;
using (var ms = new MemoryStream())
{
while (true)
{
int read = p.StandardOutput.BaseStream.Read(buffer, 0, buffer.Length);
if (read <= 0)
break;
ms.Write(buffer, 0, read);
}
file = ms.ToArray();
}
p.StandardOutput.Close();
// wait or exit
p.WaitForExit(60000);
// read the exit code, close process
int returnCode = p.ExitCode;
p.Close();
if (returnCode == 0)
return file;
}
catch (Exception ex)
{
}
finally
{
p.Close();
p.Dispose();
}
return null;
}
但是，当PDF显示图像不存在(只是一个小方框)时，我在做什么错了?
However when the PDF displays the image doesn't exist (just a little box) what am I doing wrong?
推荐答案
我已升级到最新版本的WKHTMLTOPDF，该版本已解决了该问题:
I upgraded to the latest version of WKHTMLTOPDF which fixed the issue:
这篇关于WKHTMLTOPDF不呈现Base64图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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