c# - Changing sepecific text in a specific line in text file -


here text line in aspx file want change

<center><body link=blue vlink=purple class=xl65 onload="processdata();"><form id="mainform"  action="http://localhost/xlez/datahandler/submit.aspx" method="post" enctype="multipart/form- data"><input type="hidden" id="hid_extra" name="hid_extra"  value="machine_inspection_20140807162226.xlsx||machine_inspection||excavator  inspection||excavator inspection|forklift inspection|tractor inspection"/>

my code finds line, want change action of form in line,

here code changes whole line want change specific text

string form_action ="http://\" + request.url.authority+\"/xlez/datahandler/submit.aspx\"";  while ((line = sr.readline()) != null)                         {                              if (line.contains("form id=\"mainform\""))                             {                                 index = count;                             }                             count++;                         }                         sr.dispose();                     }                     if (index != 0)                     {                         var lines = file.readalllines(selected_path);                         lines[index] = form_action ;                         file.writealllines(selected_path, lines);                     }

but replaces whole line action, want change action in line

in code line of code replaces whole line of html code:

lines[index] = form_action ;

you need replace part of string in line. following example:

string form_action ="http://\" + request.url.authority+\"/xlez/datahandler/submit.aspx\"";  while ((line = sr.readline()) != null)                         {                         if (line.contains("form id=\"mainform\""))                         {                             index = count;                         }                         count++;                     }                     sr.dispose();                 }                 if (index != 0)                 {                     var lines = file.readalllines(selected_path);                     int start = lines[index].indexof("action");                     string newline = lines[index].substring(0, start + 8) + form_action + " " + lines[index].substring(lines[index].indexof("method"));                     lines[index] = newline;                     file.writealllines(selected_path, lines);                 }

your "form_action" variable not hold right value, since escaped " before use request object. should take @ this.

adjusted form-action creation:

string form_action ="http://" + request.url.authority + "/xlez/datahandler/submit.aspx\"";

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