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Different ways of Reading a file in C#
Here, we are reading two different files −
Reading text file −
Example
using System; using System.IO; namespace FileApplication { class Program { static void Main(string[] args) { try { using (StreamReader sr = new StreamReader("d:/new.txt")) { string line; // Read and display lines from the file until // the end of the file is reached. while ((line = sr.ReadLine()) != null) { Console.WriteLine(line); } } } catch (Exception e) { // Let the user know what went wrong. Console.WriteLine("The file could not be read:"); Console.WriteLine(e.Message); } Console.ReadKey(); } } }
Output
The file could not be read: Could not find a part of the path "/home/cg/root/4281363/d:/new.txt".
Reading binary file −
Example
using System.IO; namespace BinaryFileApplication { class Program { static void Main(string[] args) { BinaryWriter bw; BinaryReader br; int i = 25; double d = 3.14157; bool b = true; string s = "I am happy"; //create the file try { bw = new BinaryWriter(new FileStream("mydata", FileMode.Create)); } catch (IOException e) { Console.WriteLine(e.Message + "\n Cannot create file."); return; } //writing into the file try { bw.Write(i); bw.Write(d); bw.Write(b); bw.Write(s); } catch (IOException e) { Console.WriteLine(e.Message + "\n Cannot write to file."); return; } bw.Close(); //reading from the file try { br = new BinaryReader(new FileStream("mydata", FileMode.Open)); } catch (IOException e) { Console.WriteLine(e.Message + "\n Cannot open file."); return; } try { i = br.ReadInt32(); Console.WriteLine("Integer data: {0}", i); d = br.ReadDouble(); Console.WriteLine("Double data: {0}", d); b = br.ReadBoolean(); Console.WriteLine("Boolean data: {0}", b); s = br.ReadString(); Console.WriteLine("String data: {0}", s); } catch (IOException e) { Console.WriteLine(e.Message + "\n Cannot read from file."); return; } br.Close(); Console.ReadKey(); } } }
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