public TextReader Run(Action <TextWriter> writeGraph, string format, Graphs.LayoutEngine engine = Graphs.LayoutEngine.Dot)
{
using (var writer = new StringWriter())
{
writeGraph(writer);
string graph = writer.GetStringBuilder().ToString();
var graphFile = Path.Combine(Path.GetTempPath(), this.filename + ".dot");
File.WriteAllText(graphFile, graph);
// now we read the file and write it to the real process input.
using (var reader = this.runner.Run(w => w.Write(graph), format, engine))
{
// we read all output, save it into another file, and return it as a memory stream
var text = reader.ReadToEnd();
var layoutFile = Path.Combine(Path.GetTempPath(), this.filename + ".layout.dot");
File.WriteAllBytes(layoutFile, Encoding.UTF8.GetBytes(text));
return(new StreamReader(new MemoryStream(Encoding.UTF8.GetBytes(text))));
}
}
}
public TextReader Run(Action <TextWriter> writeGraph, string format, Graphs.LayoutEngine engine = Graphs.LayoutEngine.Dot)
{
var process = new Process();
try
{
process.StartInfo = new ProcessStartInfo
{
CreateNoWindow = true,
UseShellExecute = false,
Arguments = $"-T{format} -K{engine.ToString().ToLowerInvariant()}",
FileName = Path.Combine(DotExecutablePath, DotExecutable),
RedirectStandardOutput = true,
RedirectStandardInput = true
};
process.Start();
process.StandardInput.AutoFlush = true;
writeGraph(process.StandardInput);
process.StandardInput.Close();
return(process.StandardOutput);
}
catch (Exception ex)
{
var msg = string.Format(
"An exception occurred in DotExeRunner.RunDot(Action<StreamWriter>)." +
"Check if you have GrahpViz installed on your machine. " +
"Check that the folder where file 'dot.exe' is (part of GraphViz installation) is " +
"either in the system PATH variable or you must set it as value of the DotExecutablePath property." +
"Original exception type {0} and message: {1}",
ex.GetType().Name,
ex.Message);
throw new Exception(msg, ex);
}
finally
{
process.Dispose();
}
}
public TextReader RunDot(Action <TextWriter> writeGraph, Graphs.LayoutEngine engine = Graphs.LayoutEngine.Dot)
{
return(Run(writeGraph, "dot", engine));
}
