In this article, I give 3 functions that generate random number based on System.Random() class. All of them are written in CSharp (C#) and demonstration are also in an ASP.NET page.
1. Function returns a non negative random number
public int GetRandomNumber() { return new System.Random().Next(); } |
2. Function returns a non negative random number less than a specified maximum number (upperBound)
public int GetRandomNumber(int upperBound)
{
return new System.Random().Next(upperBound);
} |
3. Function returns a non negative random number within a specified range (lowerBound and upperBound)
public int GetRandomNumber(int lowerBound, int upperBound) { return new System.Random().Next(lowerBound, upperBound + 1); } |
All together and demonstration in ASP.NET
using System; using System.Collections.Generic; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; public partial class random_number_function : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { int random_number_1 = GetRandomNumber(); Response.Write("random_number_1: " + random_number_1.ToString() + "<br>"); int random_number_2 = GetRandomNumber(1000); Response.Write("random_number_2: " + random_number_2.ToString() + "<br>"); int random_number_3 = GetRandomNumber(1000,2000); Response.Write("random_number_3: " + random_number_3.ToString() + "<br>"); } public int GetRandomNumber(int lowerBound, int upperBound) { return new System.Random().Next(lowerBound, upperBound + 1); } public int GetRandomNumber(int upperBound) { return new System.Random().Next(upperBound); } public int GetRandomNumber() { return new System.Random().Next(); } } |
Output:
random_number_1: 767015675 random_number_2: 357 random_number_3: -643 |
