I am working on C#. I am getting OutOfMemoryException while using string.replace(dt,"") and even for stringbuilder.replace(dt,""). May I please know how to overcome this problem? Or any other way to do the same?
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Can you please elaborate your code?Rashmi Pandit– Rashmi Pandit2009-11-19 06:24:23 +00:00Commented Nov 19, 2009 at 6:24
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thanks for reply...my problem is that i am using got huge data ....so getting problem in replacing....MGK– MGK2009-11-19 06:29:54 +00:00Commented Nov 19, 2009 at 6:29
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2 Answers
Since your data is so big, you should not try to operate on it all at once. Instead read in chucks, process it, then write it to disk and move on to the next chunk.
Here is some code (untested):
string current = getChunk();
while (current.Length > 0)
{
current = current.Replace(oldValue, newValue);
string toSave = current.Substring(0, current.Length - oldValue.Length);
saveToFile(toSave);
current = current.Substring(current.Length - oldValue.Length) + getChunk();
}
I don't save the last oldValue.Length because there is a chance that a replacement might be halfway in one chunk and halfway in another. NOTE: there might be a bug in that code, but it is pretty close.
Comments
Your string is probably way too large and the memory manager fails to find a contiguous block of memory for the new string.
You'll need to optimize your program for more efficient memory management.
4 Comments
MGK
thanks for reply ....yes the string that i am using for replace got huge data .....Can u plz suggest me any other way to do the same
Rashmi Pandit
Contiguous block of memory shouldn't be reallocated for the StringBuilder as the replace is not increasing the length of the original string. Check the link stackoverflow.com/questions/287842/… for more info
arul
Process the string inside a loop in smaller chunks.
arul
Rashmi Pandit: Had the stringbuilder grown over it's capacity, it'd need to reallocate it's internal buffer.