Change and replace text line in file C#

C# > IO > File > Read/Write Lines

ReadAllLines reads all lines of the file into a string array  and closes the file.
WriteAllLines creates a new file  writes strings to the file and closes the file.

Example:

Replace text line in a file

var lines = File.ReadAllLines(Pathfile);

lines[64] = "new text";

File.WriteAllLines(Pathfile);

Remove first character from string

C# > String > Substring

Remove first character from string

myString.Substring(1)

Check number is even or odd C#

C# > Operators > % Operator

Computes the remainder after dividing its first operand by its second.

Example: Check number is even or odd

  for (int x = 0; x < 100; x++)

  {

     if (x % 2 == 0)

      //even number

     else

      //odd number

  }

Find last modified tables Oracle

Oracle > Scripts

USER_TAB_MODIFICATIONS describes modifications to tables owned by the current user that have been modified since the last time statistics.

Example: Find last modified tables:

select * from USER_TAB_MODIFICATIONS order by timestamp desc

System.Drawing.Printing C#

C# > System.Drawing.Printing

Contains print services for Windows Forms applications.

• Print Preview Dialog
• Print Document

Gets the default printer C#

C# > Printing > PrinterSettings > IsDefaultPrinter

Gets the default printer.

Example

PrintDocument printDoc = new PrintDocument();

if (printDoc.PrinterSettings.IsDefaultPrinter)

{

MessageBox.Show (printDoc.PrinterSettings.PrinterName);

}

Get all printers installed on computer C#

C# > Printing > PrinterSettings > InstalledPrinters

Contains the names of all printers installed on the computer.

Example: Get all printers installed on computer

foreach (string prt in System.Drawing.Printing.PrinterSettings.InstalledPrinters)

{

    MessageBox.Show(prt);

}