Replacing a line in a file

[krsh24]

Hi,

I have a file (.dat). The size of the file can grow upto 20 Mb or above. The requirement is to delete the last line in the file and to replace it with a new line.

Any suggestions on how i can achieve this?

I don't want to copy the entire contents to another file skipping the last line and appending the new line.
Also reading each line into a string array would decrease the performance coz the number of line could increae more than 10,000.

Thank You
Krsh

 

[Maddock]

don't quote me on this, just talking out loud...

is there not a method in the IO which allows something like....

file.readlast(size in bytes) and use that to just read the last bit you need, modify and write back