File input/output: Difference between revisions

Content added Content deleted

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@@ Line 197: / Line 197: @@
 =={{header|C sharp|C #}}==
+<lang csharp>using System;
-{{works with|C sharp|C #|1.0+}}
+using System.IO;
-This version will change line terminators if the input file doesn't use CrLf.
+namespace FileIO
-    using System;
+{
-    using System.IO;
+    class Program
-    namespace FileIO
     {
-        class Program
+        static void Main(string[] args)
         {
-            static void Main(string[] args)
+            try
             {
-                if (File.Exists("input.txt"))
+                using (StreamReader reader = new StreamReader("input.txt"))
+                using (StreamWriter writer = new StreamWriter("output.txt"))
                 {
-                    TextReader tr = File.OpenText("input.txt");
+                    string s = reader.ReadLine();
-                    TextWriter tw = new StreamWriter(File.OpenWrite("output.txt"));
+                    while (s != null)
-                    while (tr.Peek() != -1)
                     {
-                        string line = tr.ReadLine();
+                        writer.WriteLine(s);
+                        s = reader.ReadLine();
-                        tw.WriteLine(line);
                     }
-                    tw.Close();
-                    tr.Close();
-                }
-                else
-                {
-                    Console.WriteLine("Input File Missing.");
                 }
+            }
+            catch (Exception exception)
+            {
+                Console.WriteLine(exception.Message);
             }
         }
     }
+}</lang>
-There is an easier way:
+There is an easier way in .NET 2.0:
-    using System;
+<lang csharp>using System;
-    using System.IO;
+using System.IO;
-    namespace FileIO
+namespace FileIO
+{
+    class Program
     {
-        class Program
+        static void Main(string[] args)
         {
-            static void Main(string[] args)
+            try
             {
-                if (File.Exists("input.txt"))
+                File.WriteAllText("output.txt", File.ReadAllText("input.txt"));
-                {
+            }
+            catch (Exception exception)
-                    File.WriteAllText("output.txt", File.ReadAllText("input.txt"));
-                }
+            {
-                else
+                Console.WriteLine(exception.Message);
-                {
-                    Console.WriteLine("Input File Missing.");
-                }
             }
         }
     }
+}</lang>
 =={{header|C++}}==