Problem Matching Input Username With Database

I tried  matching the input username with the database. Although
the input value is the same as the database, but it doesnt goes into
the if statement to increase the "stat" value. Please advise what went
wrong. Thanks.

protected void btnEnter_Click(object sender, EventArgs e)
    {
        if (txtUsername.Text.Length > 0)
        {
            status++;
            Label3.Text = "";
        }
        else
        {
            Label3.Text = "Please enter a username";
        }

        if (txtPassword.Text.Length > 0)
        {
            status++;
            Label4.Text = "";
        }
        else
        {
            Label4.Text = "Please enter a password";
        }
        
        if (status == 2)
        {
            int stat = 0;
            string mySelectQuery = "SELECT * FROM users";
           
SqlConnection myConnection = new SqlConnection("Data
Source=WINSON-COMP;Initial Catalog=winson;Integrated Security=True");
           
SqlCommand myCommand = new SqlCommand(mySelectQuery, myConnection);
            try
            {
                myConnection.Open();
               
SqlDataReader myReader = myCommand.ExecuteReader();
                while (myReader.Read())
                {
                    stat = 0;
                   
string user = (string)myReader["username"];
                   
string pass = (string)myReader["password"];
                   
if (user == txtUsername.Text){                       
stat++;
                    }else {
                       
Label3.Text = "Incorrect Username";
                    }
                   
if (pass == txtPassword.Text){
                       
stat++;
                    }else{
                       
Label4.Text = "Incorrect Password";
                    }
                   
if (stat == 2)
                    {
                       
Server.Transfer("shopping.aspx");
                    }
                }
                myReader.Close();
            }
            finally
            {
                myConnection.Close();
            }

        }
    }