how to validate username password in windows form application?

Question

0.00/5 (No votes)

See more:

C#

private void button1_Click_1(object sender, EventArgs e)
{
    SqlConnection con = new SqlConnection(@"data source=ABHINAV-PC\ABHI;integrated security=true;initial catalog=ATM;");
    con.Open();
    DataSet ds = new DataSet();
    if (textBox1.Text == "@UserName" && textBox2.Text == "@Password")
    {
        Administrator_Home ah = new Administrator_Home();
        ah.Show();
    }
    else
        MessageBox.Show("invalid username or password");
}

Posted 11-Mar-14 2:27am

Abhinav Chaudhary

Updated 11-Mar-14 7:01am

Richard MacCutchan

v2

Add a Solution

Comments

Richard MacCutchan 11-Mar-14 13:03pm

Credentials are used to login to the database and are validated internally. Your code just needs to check whether it succeeds or not.

3 solutions

Solution 2

There are tons of examples on CP Knowledge Base[^] and via Google[^]

Posted 11-Mar-14 10:55am

Maciej Los

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Aravindba · Accepted Answer · 2014-03-11T17:11:00

Hai

Try this

C#

   private void btnOk_Click(object sender, EventArgs e)
        {
            
        SqlConnection connect = new SqlConnection(@"data source=ABHINAV-PC\ABHI;integrated security=true;initial catalog=ATM;");
DataTable dt1 = new DataTable();
string strcmd1 = "";
SqlDataAdapter cmd1 = new SqlbDataAdapter;
                      connect.Open();
           strcmd1  = ("SELECT UserName, PassWord FROM Admin WHERE UserName='" & Textbox1.Text.Trim() & "' and Password='" & Textbox1.Text.Trim() & "'");
 

cmd1 = new SqlDataAdapter(new SqlCommand(strcmd1));
cmd1.SelectCommand.Connection = connect;
 
cmd1.Fill(dt1)
if ((dt1.Rows.Count > 0)) {
	 Administrator_Home ah = new Administrator_Home();
        ah.Show();
} else {
MessageBox.Show("invalid username or password");
}
        }
 
    }
}

AndrewCharlz · Accepted Answer · 2014-03-11T07:07:00

Solution 1

its very simple friend just use the sql qry like select * from tbl where username ='' and pwd =''

if u return result then user is available else user s nt available

Posted 11-Mar-14 7:07am

AndrewCharlz