Introduction
While .NET class BinaryReader
provides many useful methods, e.g., ReadByte
, ReadDouble
, etc., there are no such methods in TextReader
. As far as I know, there is neither a .NET class similar to good Java Scanner
class (java.util.Scanner
) nor a .NET class providing methods similar to C/C++ CRT function scanf
. This means that the reading of text files may become, especially for beginners, a nightmare. The common way is to read the whole line, split it into tokens and convert these tokens into the required format (Byte
, Double
, Int32
, ...) but it is not very convenient. Therefore I decided to program my own class to simplify text data processing.
Using the Code
ZCU.IO.TextParser
is a small class written in C# 2.0 that is able to read text data from String
or TextReader
object. It provides methods for reading numbers, words, tokens matching the given pattern, etc. It also contains the method Scanf
for formatted reading.
The following example, which can read 2D or 3D points from the text file, demonstrates the use of this class.
Input file 1
100
0.10330 0.00540
0.42320 0.49370
0.23690 0.56980
etc.
Input file 2
100
0.10330 0.00540 0.23690
0.42320 0.49370 0.23690
0.23690 0.56980 0.10330
etc.
The code for loading input files is as follows:
StreamReader lReader = new StreamReader(new FileStream(strFilePath,
FileMode.Open, FileAccess.Read, FileShare.Read),Encoding.UTF8);
ZCU.IO.TextParser parser = new ZCU.IO.TextParser(lReader);
uint nNumVert = parser.ReadUInt32();
m_TriData.Vertices = new TRS_VERTEX[nNumVert];
string line = parser.ReadLine();
ZCU.IO.TextParser line_parser = new ZCU.IO.TextParser(line);
object[] xyz = new object[3];
xyz[2] = new System.Single();
string format = "%f %f %f\n";
if (line_parser.Scanf(format, xyz) < 3)
format = "%f %f\n";
List<STRING> formatList = ZCU.IO.TextParser.ConstructFormatList(format);
m_TriData.Vertices[0].x = (float)xyz[0];
m_TriData.Vertices[0].y = (float)xyz[1];
m_TriData.Vertices[0].z = (float)xyz[2];
for(uint i = 1; i < nNumVert; i++)
{
parser.Scanf(formatList, xyz);
m_TriData.Vertices[i].x = (float)xyz[0];
m_TriData.Vertices[i].y = (float)xyz[1];
m_TriData.Vertices[i].y = (float)xyz[2];
}
Points of Interest
The source code can be used, modified and redistributed under the terms of the license agreement that is included in the deployment package.
History
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.