Using a Switch statement with Enum
Enumeration and Switch Case
Enums are strongly typed constants and very useful in programming when your program needs constant values. It provides efficient way to assign multiple constant integral values to a single variable.
Syntax
enum <name>
{
enum list
};
Switch Case
Switch...Case can act upon enum values. The following C# program shows how to Enum work with Switch...case. In the following program , declare an enum backColors.
C#
public enum backColors
{
RED, BLUE, GREEN, YELLOW
}
VB.Net
Public Enum backColors
RED
BLUE
GREEN
YELLOW
End Enum
In the paintColor color method , pass enum values and color the background of the form with the help of a switch...case statement.
Source Code | C#
using System;
using System.Drawing;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public enum backColors
{
RED, BLUE, GREEN, YELLOW
}
public void paintColor(backColors pc)
{
switch (pc)
{
case backColors.RED:
this.BackColor = Color.Red ;
break;
case backColors.BLUE:
this.BackColor = Color.Blue ;
break;
case backColors.GREEN:
this.BackColor = Color.Green ;
break;
case backColors.YELLOW:
this.BackColor = Color.Yellow ;
break;
default:
this.BackColor = Color.Gray ;
break;
}
}
private void button1_Click(object sender, EventArgs e)
{
paintColor(backColors.GREEN);
}
}
}
Source Code | Vb.Net
Public Class Form1
Public Enum backColors
RED
BLUE
GREEN
YELLOW
End Enum
Public Sub paintColor(ByVal pc As backColors)
Select Case pc
Case backColors.RED
Me.BackColor = Color.Red
Exit Select
Case backColors.BLUE
Me.BackColor = Color.Blue
Exit Select
Case backColors.GREEN
Me.BackColor = Color.Green
Exit Select
Case backColors.YELLOW
Me.BackColor = Color.Yellow
Exit Select
Case Else
Me.BackColor = Color.Gray
Exit Select
End Select
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
paintColor(backColors.GREEN)
End Sub
End Class
NEXT.....Passing Data