Downtown Programmer's Corner   -   Demos   -   C#

Files

Some snippets around file handling in C#.

Get the filename of current program.

Get the filename of the currently running program:

   // (# 20111008.1301)
   // This will yield e.g. "G:\work\downtown\csdemos\trunk\ieautomat\ieautomat\bin\Debug\ieautomat.exe",
   // it will be the same, if the line is inside the calling program or inside a dll which is called by the program.
   string sThisfile = System.Reflection.Assembly.GetEntryAssembly().Location;

   // (# 20111008.1302)
   // This will yield e.g. "G:\work\downtown\csdemos\trunk\ieautomat\ieautomat\bin\Debug".
   // It may touch the filesystem and throw an exception if you don't have appropriate permission. [todo: verify statement]
   DirectoryInfo dinfo = new DirectoryInfo(sThisfile);
   string sThispath = dinfo.Parent.FullName;

Textfiles

Read textfile to array: (# 20111007.1231, 20111007.1232).

   string sFile = "C:\testfile.txt";
   string[] a = {};
   if (System.IO.File.Exists(sFile)
   {
      a = System.IO.File.ReadAllLines(sFile);
   }

Write array to textfile: (# 20111007.1234).

   // ..
   string[] aLines = {"Line one.", "Line two.", "Line three."};
   System.IO.File.WriteAllLines(@"C:\tmp\output.txt", aLines);

Append lines to textfile: (# 20111007.1234).

   (# 20111007.1521).
   using (System.IO.StreamWriter file = new System.IO.StreamWriter(sInifile, true))
   {
      file.WriteLine(s);
      file.WriteLine("");
   }  

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Links

	MSDN   File Class   about the File class, e.g. to copy files ... (# 20111115.1241).	Reference
	MSDN How to: Write to a Text File (C# Programming Guide). Simple recipe. (# 20111007.1234)	Recipe
	MSDN How to: Read From a Text File (C# Programming Guide). Simple recipe. (# 20111007.1232)	Recipe
	MSDN File.Exists Method simple recipe (# 20111007.1231).	Recipe

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