例外：字符串文件名太长（进程）

Question

I am using the code below to pass an argument to a process

 ProcessStartInfo StartInfo = new ProcessStartInfo();
 StartInfo.FileName = HttpContext.Current.Server.MapPath(@"\highcharts\phantomjs.exe");
 StartInfo.Arguments = HttpContext.Current.Server.MapPath(@"\highcharts\highcharts-convert.js");
 StartInfo.Arguments += @" -outfile " + path + @"\chart" + templateData[i].ReportTemplateChartId + ".png -width 800 -infile " + chartoptions1;
 StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
 StartInfo.CreateNoWindow = false;  

In chartoptions1 I was using a JSON string, but it throws an exception saying string filename too long , so I created a text file and tried to pass it, but the chart image is not generated.

Answer 1

From this MSDN page,

On Windows Vista and earlier versions of the Windows operating system, the length of the arguments added to the length of the full path to the process must be less than 2080. On Windows 7 and later versions, the length must be less than 32699.

Did you check the length of StartInfo.Arguments ?

On the other part, a quick look at this wiki page on Github,

-infile: The file to convert, assumes it's either a JSON file, the script checks for the input file to have the extension '.json', or otherwise it assumes it to be an svg file.

So, -infile should be a file and not a JSON content. I suppose your chartoptions1 is quite large, so you have the error message string filename too long .

Highcharts may also check the length of the infile path (256 ?)

The running script should have at least read access to the infile and should be resolvable ; especially if you don't specified a working directory, you have to add the full path with infile and not just the filename.

To debug, a working directory issue, simply test with a constant path such as c:\\test