Writing in a File at Some Specific Position

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When by Using the Stream Reader if we read the File Line By Line.

Now If I wants to Write The File using StreamWriter At Some Specific Position Then How I will Come to Know about That When I was Present at that Specific Position.

Can Anyone Please Share The Explanation with an Example/Code Snippet ..?

Posted 17-Jan-13 8:03am

AyushJain1890

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Jibesh · Accepted Answer · 2013-01-17T08:59:00

Solution 1

You can use the Seek method of the BaseStream property of StreamWriter class to jump to the location.

sample code

C#

FileStream stream = new FileStream(@"filename.txt",FileMode.Open,FileAccess.ReadWrite);
StreamWriter writer = new StreamWriter(stream);

writer.BaseStream.Seek(10000, SeekOrigin.Begin); // where 10000 is the offset to jump
writer.WriteLine("new Test starts here");

Check MSDN-Seek[^] and BaseStream[^] links for more details

Posted 17-Jan-13 8:59am

Jibesh

Comments

Sergey Alexandrovich Kryukov 17-Jan-13 16:56pm

Correct, a 5.
—SA

Jibesh 17-Jan-13 16:58pm

Thank you SA

AyushJain1890 23-Jan-13 13:32pm

Also The Small Addition to the above code.
writer.Close();
writer.Dispose();

You Need To Close The writer because The Data is in the RAM before closing the writer, Once the writer is closed the data is written in the file as the Data is Transferred from RAM to main memory

Jibesh 23-Jan-13 13:34pm

Yes, thats Obvious. once should read the MSDN Remarks section before start using the method ;)

AyushJain1890 23-Jan-13 13:40pm

Thanks Jibesh For Your Help.

Jibesh 23-Jan-13 13:41pm

Glad to hear that. Cheers.

AyushJain1890 23-Jan-13 13:41pm

Also one More Question..

If you are reading any file and You have Completed reading up-to a Specific Line now You want to Know the offset i.e. The Position Up to Which you Have Completed Reading.

Any Sample Code Will Help.

Jibesh 23-Jan-13 13:44pm

You can use the Position property of the BaseStream to know current position in the stream.

AyushJain1890 23-Jan-13 14:00pm

Thanks..