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Reading only a section of one record

Hi,

I am trying to read and parse a record of fixed length 253 bytes from a .txt file. Of the 253 bytes, I need to process only the first 124 bytes. The problem is there is a new line character in the record because of which a section of the  record ( starting from byte 125) falls into the next line as shown below.

The number of bytes resets to 0 and the program treats the bottom section as a new record though it is still one record.

000580667           TIHH             0400600020                            7529100                       7529352   R00010001A
POSITIVE                                                                                                                     3

My question is:

How can i read only the top section(where I have the first 124 bytes) of the record and completely skip the bottom section?

Doing something like this in my while loop:

while((record == read.ReadLine()) ! = null){
string data = record.Substring(0,124);
}
would fetch both the top and bottom sections and I need to process only the top section.

Can somebody help me with this problem?

Thanks
0
pdurbha
Asked:
pdurbha
1 Solution
 
Raynard7Commented:
Just put a bool in so you can alternate them

bool thisLine = true;
while((record == read.ReadLine()) ! = null){
    if(thisLine) {
        string data = record.Substring(0,124);
        thisLine = false;
    } else {
        thisLine = true;
    }
}
0
 
ozymandiasCommented:
You could also not read lines but read bytes.
If each record is fixed with you could read 124 bytes and then skip 129 bytes, then read 124 bytes etc.
0
 
mjmarlowCommented:
 You could also read it directly using BinaryReader.  

        using System.IO;
        /// <summary>
        ///  (untested) Example of reading a single record from a fixed
        /// length record datafile.  
        /// </summary>
        /// <param name="filename">path and name of fixed length file</param>
        /// <param name="recordNumber">0 = first record</param>
        /// <param name="recordSize">Length</param>
        public string  GetData(string filename, int recordNumber, int recordSize)
        {
            FileStream fs = new FileStream(filename, FileMode.Open, FileAccess.Read);
            BinaryReader r = new BinaryReader(fs);
            r.BaseStream.Seek(recordNumber * recordSize);
            char[] buffer = r.ReadChars(recordsize);
            string data = new string(buffer, 0, buffer.Length);
            r.Close();
            fs.Close();
            return data;
        }
0
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