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Problem in verify data via SQL

Posted By:      Posted Date: September 07, 2010    Points: 0   Category :ASP.Net
 
I am facing problem in verify a registered user. The program can only read the first row table data. For example, the row 1 username is A, password is a, the row 2 username is B, the password is b, if I login via username A i can enter the system, but if I login via username B, the program cannot verify the username B. Here are my codes....Can anyone tell me what's going on?private bool YourValidationFunction(string UserName, string Password)    {        bool boolReturnValue = false;        string strConnection = @"Data Source=MY-PC;Initial Catalog=myDB.MDF;Integrated Security=True";        SqlConnection sqlConnection = new SqlConnection(strConnection);        String SQLQuery = "SELECT psw, userID, usertype FROM dbo.users_login";        SqlCommand command = new SqlCommand(SQLQuery, sqlConnection);        SqlDataReader Dr;        sqlConnection.Open();        Dr = command.ExecuteReader();        while (Dr.Read())        {            if ((Login1


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