Csharp/C Sharp/File Stream/StringWriter

The hex dump program.

<source lang="csharp">

using System; using System.IO;

class Class1 {

   public static string Pad(string s, int len) {
       string temp = s;
       for (int i = s.Length; i < len; ++i)
           temp = "0" + temp;
       return temp;
   }
   static void Main(string[] args) {
       StreamReader sr = new StreamReader("c:\\a.txt");
       string line = "";
       int nCounter = 0;
       int nOffset = 0;
       while ((line = sr.ReadLine()) != null) {
           for (int i = 0; i < line.Length; ++i) {
               int c = (int)line[i];
               string fmt = String.Format("{0:x}", c);
               if (fmt.Length == 1)
                   fmt = Pad(fmt, 2);
               if (nOffset % 16 == 0) {
                   string offsetFmt = nOffset.ToString();
                   System.Console.Write(Pad(offsetFmt, 5) + ": ");
               }
               System.Console.Write(fmt + " ");
               if (nCounter == 15) {
                   System.Console.Write("\n");
                   nCounter = 0;
               } else
                   nCounter++;
               nOffset++;
           }
       }
   }

}

</source>

Use StringWriter to write string

<source lang="csharp"> using System; using System.IO; using System.Text; class StringReadWriteApp {

   static void Main(string[] args) {
       StringWriter w = new StringWriter();
       w.WriteLine("Sing a song of {0} pence", 6);
       string s = "A pocket full of rye";
       w.Write(s);
       w.Write(w.NewLine);
       w.Write(String.Format(4 + " and " + 20 + " blackbirds"));
       w.Write(new StringBuilder(" baked in a pie"));
       w.WriteLine();
       w.Close();
       Console.WriteLine(w);
   }

}

      </source>