How to search for a particular text inside a text file ?

[[Deleted]]

I want to search the text "MESSAGE" in a particular txt file in files folder.

[Drazen Penic]

With MQL for text files simplest thing is to read line by line from the field and then search inside the line with StringFind() function.

[Sebastian Niemiec]

Ctrl + F

[[Deleted]]

Sebastian Niemiec:

Ctrl + F

i was programatic search

[Alain Verleyen]

balachandran chandrasekar:
i was programatic search

Please show your attempt.

[[Deleted]]

Alain Verleyen:
Please show your attempt.

int fhandle=FileOpen("blg.txt",FILE_READ|FILE_BIN);

string want,str2;

string str;
str= FileReadString(fhandle,100000);
want="MESSAGE";
k=StringFind(str,want,2);
c=FileTell(1);
g=c-k-7;
FileSeek(fhandle,-g,SEEK_CUR);
str= FileReadString(fhandle,250);

c=FileTell(1);
//Alert("cp",c);
FileSeek(fhandle,-187,SEEK_CUR);
str2= FileReadString(fhandle,200);

b=StringFind(str,"<div",2);
str=StringSubstr(str,0,b);

[Alain Verleyen]

balachandran chandrasekar:

Ok. You read the data in a buffer (string) and use StringFind(), seems correct approach.

And what is the problem ?

[[Deleted]]

Alain Verleyen:

Ok. You read the data in a buffer (string) and use StringFind(), seems correct approach.

And what is the problem ?

i download  a blogsites home page. my need is to extract the last post. each post will have the starting word MESSAGE and then some txt.

But when i use that it was extracting text from the first line of the file.

i have one doubt . What is the maximum buffer size ? how much characters it can hold ?

the file size was some what 80 KB.

Whether that may be an issue ? 

[[Deleted]]

Meanwhile i have found some other way to do it.

but still i want to know, what went wrong in the previous code