In this blog we will know how to change the old password to new password in asp.net.

<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="Change_password_in_asp._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<title>Untitled Page</title>

</head>

<body>

<div>

<asp:Label ID="Label1" runat="server" Text="Password:" Width="150px"></asp:Label>

<asp:TextBox ID="txtpassword" runat="server"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"

ControlToValidate="txtpassword" ErrorMessage="RequiredFieldValidator">Password

cannot be blank</asp:RequiredFieldValidator>

<br />

<asp:Label ID="Label2" runat="server" Text="New Password:" Width="150px"></asp:Label>

<asp:TextBox ID="txtnpassword" runat="server"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server"

ControlToValidate="txtnpassword" ErrorMessage="RequiredFieldValidator">NewPassword

cannot be blank</asp:RequiredFieldValidator>

<br />

<asp:Label ID="Label3" runat="server" Text="Confirm New Password:"

Width="150px"></asp:Label>

<asp:TextBox ID="txtcpassword" runat="server"></asp:TextBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server"

ControlToValidate="txtcpassword" ErrorMessage="RequiredFieldValidator">ConfirmPassword

cannot be blank</asp:RequiredFieldValidator>

<asp:CompareValidator ID="CompareValidator1" runat="server"

ControlToCompare="txtnpassword" ControlToValidate="txtcpassword"

ErrorMessage="CompareValidator">Not equal</asp:CompareValidator>

<br />

<asp:Button ID="btn_cpass" runat="server" Text="Change password" />

<asp:Button ID="btn_clear" runat="server" Text="Clear" />

</div>

<asp:GridView ID="GridView1" runat="server">

</asp:GridView>

</form>

</body>

</html>

Imports System.Data

Imports System.Data.SqlClient

Partial Public Class _Default

Inherits System.Web.UI.Page

Dim strConnString As String = System.Configuration.ConfigurationManager.ConnectionStrings.Item("ConnectionString").ToString()

Dim con As New SqlConnection(strConnString)

Dim str As String

Dim com As SqlCommand

Dim sqlda As SqlDataAdapter

Dim ds As DataSet

Dim up As Byte

Protected Sub btn_cpass_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btn_cpass.Click

Try

If con.State = ConnectionState.Open Then

con.Close()

End If

con.Open()

str = "select * from emp"

com = New SqlCommand(str, con)

Dim reader As SqlDataReader = com.ExecuteReader

Do While reader.Read

If txtpassword.Text = reader("oldpwd") Then

up = 1

End If

Loop

reader.Close()

con.Close()

If up = 1 Then

con.Open()

str = "update emp set oldpwd='" & txtcpassword.Text & "' where oldpwd='" & txtpassword.Text & "'"

com = New SqlCommand(str, con)

com.ExecuteNonQuery()

con.Close()

Response.Write("Password changed")

Else

Response.Write("Please enter correct Oldpassword")

txtpassword.Focus()

End If

Catch ex As Exception

Response.Write(ex.Message)

End Try

clear()

bindgrid()

End Sub

Protected Sub btn_clear_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btn_clear.Click

clear()

End Sub

Sub clear()

txtpassword.Text = ""

txtnpassword.Text = ""

txtcpassword.Text = ""

txtpassword.Focus()

End Sub

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load

If Not IsPostBack Then

bindgrid()

End If

End Sub

Sub bindgrid()

con.Open()

str = "select * from emp"

com = New SqlCommand(str, con)

sqlda = New SqlDataAdapter(com)

ds = New DataSet()

sqlda.Fill(ds, "emp")

GridView1.DataSource = ds

GridView1.DataMember = "emp"

GridView1.DataBind()

con.Close()

End Sub

End Class

Change old password to new password in Asp.net

Thanks for reading