How to set a direction for line if we have from and to attributes

[ItalConsult__Qatar]

I have a huge road network data, I have two attributes from node and to node. I have to set direction of the line from node to to node irrespective digitizing direction

[DanPatterson_Retired]

Does that mean you actually want to reorder the polylines or do you want some indicator in the table that the order goes with or against the order of digitizing?

Flip Line—Help | ArcGIS Desktop 

If you know or have the coordinates of "from" or the "to" location you could compare them to the 'StartX, StartY' using

Add Geometry Attributes—Data Management toolbox | ArcGIS Desktop 

to get those values.  If they differ, then you could query for the flip line tool