winforms - How to replace multiple texts in a file in c#? -

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i automating process using c#. script below, 

 update   table  set   param_val = replace(param_val,'proxy430/','proxy440/')    param_key = 'proxy_url';    update   table   set   param_val = replace (param_val, '.420/', '.430/')    param_val '%.420/%';

for every month, upgrade version 44 in place of 43 , 43 in place of 42 , run script. automate, i've written c# code , used below code

string text = file.readalltext(filepath); text.replace(oldvale, newvalue); file.writealltext(filepath, text);

but, issue can replace 1 word only. how replace 2 texts in file. in case, proxy430 should replaced proxy440 , proxy440 proxy450 in single shot.

how achieve this?

if call replace in right order can accomplish 2 replacements on single line.

string teststring = @"update   table set param_val = replace(param_val, 'proxy430/', 'proxy440/') param_key = 'proxy_url';  update table set param_val = replace(param_val, '.420/', '.430/') param_val '%.420/%'; ";  const string oldfrom = "proxy430"; const string oldto = "proxy440"; const string newfrom = "proxy440"; const string newto = "proxy450";  string result = teststring.replace(newfrom, newto).replace(oldfrom, oldto); console.writeline(result);

the output is:

update   table  set param_val = replace(param_val, 'proxy440/', 'proxy450/')  param_key = 'proxy_url';  update table  set param_val = replace(param_val, '.420/', '.430/')  param_val '%.420/%';

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