validate password in asp.net

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1.00/5 (2 votes)

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C#

ASP.NET

how i can validate password length in asp.net??
and also compare password nd confirm password..

Posted 4-Sep-12 23:53pm

Member 9332883

Updated 10-Sep-17 22:50pm

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Cristian Mayo · Answer 1 · 2017-09-10T22:50:00

Your question is quite ambigious since you did not mention if you're using Web Forms or MVC. Nevertheless, you can use client-side validation in javascript with RegEx.test method since it can be used in both Web Forms and MVC.

JavaScript

var hasError = false;
var password = $('#password').val();
if (password.length > 0) {
    var passwordTest = new RegExp('^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[~`!@#\$%\^&\*,.])(?=.{8,})');
    if (!passwordTest.test(password)) {
        hasError = true;
    }
}

RegEx Description:
^	            The password string will start this way
(?=.*[a-z])	    The string must contain at least 1 lowercase alphabetical character
(?=.*[A-Z])	    The string must contain at least 1 uppercase alphabetical character
(?=.*[0-9])	    The string must contain at least 1 numeric character
(?=.*[!@#\$%])	The string must contain at least one special character
(?=.{8,})	    The string must be eight characters or longer

Teja Swaroop · Answer 2 · 2012-09-04T23:59:00

XML

<asp:Label ID="lbl_password" runat="server" CssClass="Label" Text="Password"></asp:Label>
            <div class="cleaner">
            </div>
            <asp:TextBox ID="radtxtPassword" runat="server" TextMode="Password" CssClass="textbox" ValidationGroup="RegisterCheck">
            </asp:TextBox>
            <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="radtxtPassword"
                ValidationGroup="RegisterCheck" ></asp:RequiredFieldValidator>

            <asp:RegularExpressionValidator ID="valPassword" runat="server" ControlToValidate="radtxtPassword"
                ErrorMessage="Minimum password length is 6" ValidationExpression="^([a-zA-Z0-9@#$%^&+=*]{6,30})$"
                ValidationGroup="RegisterCheck" />
            <div class="cleaner_h10">
            </div>
            <asp:Label ID="lbl_ConfirmPassword" runat="server" CssClass="Label" Text="Confirm Password"></asp:Label>
            <div class="cleaner">
            </div>
            <asp:TextBox ID="radtxtConfirmPassword" runat="server" TextMode="Password" CssClass="textbox"
                ValidationGroup="RegisterCheck">
            </asp:TextBox>

            <asp:CompareValidator ID="cmpvldPassword" runat="server" ControlToCompare="radtxtConfirmPassword"
                ControlToValidate="radtxtPassword" Type="String" Operator="Equal" ValidationGroup="RegisterCheck"
                ErrorMessage="Password should match"></asp:CompareValidator>

VB

<asp:Button ID="btnCreateuser" runat="server" CssClass="complete_btn" ValidationGroup="RegisterCheck"
                BorderStyle="None" OnClick="btnCreateuser_Click" CausesValidation="true" />

Prasad_Kulkarni · Answer 3 · 2012-09-04T23:56:00

Have a look:
How to Use the ASP.NET Validation Control to Validate the User Input[^]

Try this code:

C#

public bool IsPasswordsEqual(string password1, string password2)
{
	if (password1.Equals(password2))
        {
		return true;
	}
	return false;
}

use this method on submit button click event or confirmpassword textbox leave event
as

C#

if(!IsPasswordsEqual(Textbox1.Text,TextBox2.Text))
{
   MessageBox.Show("Enter same password in both");
}

Refer: Compare password[^]

validate password in asp.net

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