Writing to a file with C#
As with everything, we must start somewhere, and that somewhere is here at
main()...
| Code: |
|
// files.cs
class
abc
{
static void
Main()
{
/* our program entry point*/
}
} |
| Code: |
|
// files.cs
// You will usually need
using
System.IO;
// for input output operations
class
abc
{
static void
Main()
{
// FileMode - Append, Create,
CreateNew, Open, OpenOrCreate, or Truncate
// FileAccess - Read, ReadWrite, or
Write
FileStream file = new
FileStream("test.txt", FileMode.OpenOrCreate, FileAccess.Write);
}
} |
But of course, this is bad, we are opening a file, or
should I say creating a file, but not closing our file handle.... which we'll do
in the next part :)
| Code: |
|
// files.cs
// You will usually need
using
System.IO;
// for input output operations
class
abc
{
static void
Main()
{
// FileMode - Append, Create,
CreateNew, Open, OpenOrCreate, or Truncate
// FileAccess - Read, ReadWrite, or
Write
FileStream file = new
FileStream("test.txt", FileMode.OpenOrCreate, FileAccess.Write);
// Create a new stream to write to the
file
StreamWriter sw = new
StreamWriter(file);
// Write a string to the file
sw.Write("Hello file system world!");
// Close StreamWriter
sw.Close();
// Close file
file.Close();
}
} |
| Code: |
|
// files.cs
// You will usually need
using
System.IO;
// for input output operations
class
abc
{
static void
Main()
{
// FileMode - Append, Create,
CreateNew, Open, OpenOrCreate, or Truncate
// FileAccess - Read, ReadWrite, or
Write
// Read the whole file contents in
FileStream file = new
FileStream("test.txt", FileMode.OpenOrCreate, FileAccess.Read);
// Create a new stream to read from a
file
StreamReader sr = new
StreamReader(file);
// Read contents of file into a string
string s = sr.ReadToEnd();
// Close StreamReader
sr.Close();
// Close file
file.Close();
}
} |
|
