Introduction:
Here I will explain how to generate random string or password in asp.net using c#, vb.net with example or generate random number and string with example in asp.net using c#, vb.net or generate random alphanumeric string in asp.net using c#, vb.net with example.
Description:
In previous articles I explained insert, update, delete in gridview with single stored procedure, jQuery gridview crud operations without postback in asp.net, gridview examples in asp.net, display images from database using handler in asp.net, generate random password in asp.net using c# and many articles relating to gridview, asp.net, c#,vb.net and jQuery. Now I will explain how to generate random string or password or alphanumeric string in asp.net using c#, vb.net with example.
In previous articles I explained insert, update, delete in gridview with single stored procedure, jQuery gridview crud operations without postback in asp.net, gridview examples in asp.net, display images from database using handler in asp.net, generate random password in asp.net using c# and many articles relating to gridview, asp.net, c#,vb.net and jQuery. Now I will explain how to generate random string or password or alphanumeric string in asp.net using c#, vb.net with example.
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Generate Random Number
or String or Password in Asp.net</title>
</head>
<body>
<form id="form1"
runat="server">
<div>
Enter Number of Characters: <asp:TextBox ID="txtCharacters" runat="server"/>
<asp:Button ID="btnGenerate"
Text="Generate"
runat="server"
onclick="btnGenerate_Click" /><br
/>
<asp:Label ID="lblResult"
runat="server"
ForeColor="Red"
/>
</div>
</form>
</body>
</html>
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Now add following namespaces in code behind
C#
Code
using System;
using System.Web;
|
After completion of adding namespaces you need to write the
code like as shown below
protected void Page_Load(object
sender, EventArgs e)
{
}
protected void btnGenerate_Click(object
sender, EventArgs e)
{
// declare array string to generate random string with
combination of small,capital letters and numbers
char[] charArr = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray();
string strrandom = string.Empty;
Random objran = new Random();
int noofcharacters = Convert.ToInt32(txtCharacters.Text);
for (int i = 0; i < noofcharacters; i++)
{
//It will not allow Repetation of Characters
int pos = objran.Next(1,
charArr.Length);
if
(!strrandom.Contains(charArr.GetValue(pos).ToString()))
strrandom += charArr.GetValue(pos);
else
i--;
}
lblResult.Text = strrandom;
}
|
VB.NET
Code
Imports System.Web
Partial Class VBCode
Inherits System.Web.UI.Page
Protected Sub Page_Load(sender As
Object, e As EventArgs)
End Sub
Protected Sub btnGenerate_Click(ByVal
sender As Object,
ByVal e As EventArgs)
' declare array string to generate random string with
combination of small,capital letters and numbers
Dim charArr As Char() = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".ToCharArray()
Dim strrandom As String = String.Empty
Dim objran As New Random()
Dim noofcharacters As Integer = Convert.ToInt32(txtCharacters.Text)
For i As Integer = 0 To noofcharacters - 1
'It will not allow Repetation of Characters
Dim pos As Integer = objran.[Next](1,
charArr.Length)
If Not
strrandom.Contains(charArr.GetValue(pos).ToString()) Then
strrandom += charArr.GetValue(pos)
Else
i -= 1
End If
Next
lblResult.Text = strrandom
End Sub
End Class
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Demo
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2 comments :
Its an awsm thng but i want that enter only your name or username and then we create a password... can u plz help me.????
Nice blog
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