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Kevin Cope
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19
16.1k
Adding/reading Information from Database (Login/Register) problems
May 23 2011 5:53 PM
If i'm somehow in the wrong forum please say so.
For the past day I have been trying to create a register/login system.
Where a user submits the data where it gets stored on a table. Then the user submits the information to login.
Heres the problem. The information is not being stored. I don't have much experience with SQL, so doing what I usually do with something I don't know, I youtube it.
And that ultimately left me with this project here.
Note: Yes I did test the connection and it was connected.
any help is appreciated
Register Form
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;
namespace Login_Database
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string connection = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True";
SqlConnection cn = new SqlConnection(connection);
try
{
cn.Open();
}
catch
{
MessageBox.Show("Could not connect");
}
}
private void button1_Click(object sender, EventArgs e)
{
Form2 form2 = new Form2();
form2.Show();
string connection = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True";
SqlConnection cn = new SqlConnection(connection);
try
{
cn.Open();
}
catch
{
MessageBox.Show("Could not login");
}
string username = textBox1.Text;
string password = textBox2.Text;
string sqlquery = ("SELECT * FROM User WHERE Username = '" + textBox1.Text + "'");
sqlquery = "INSERT INTO [User] (Username, Password) VALUES ('" + textBox1.Text + "','" + textBox2.Text + ")";
SqlCommand command = new SqlCommand(sqlquery, cn);
command.Parameters.AddWithValue("Username", username);
command.Parameters.AddWithValue("Password", password);
command.Parameters.Clear();
}
private void button2_Click(object sender, EventArgs e)
{
Form2 form2 = new Form2();
form2.Show();
Form1 form1 = new Form1();
form1.Hide();
}
}
}
Login Form
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;
namespace Login_Database
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string connection = @"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;User Instance=True";
SqlConnection cn = new SqlConnection(connection);
try
{
cn.Open();
}
catch
{
MessageBox.Show("Could not connect");
}
SqlCommand cmd = new SqlCommand("SELECT * FROM [USER]", cn);
cmd.Connection = cn;
SqlDataReader reader = null;
reader = cmd.ExecuteReader();
while (reader.Read())
{
if (textBox1.Text == (reader["Username"].ToString()) && textBox2.Text == (reader["Password"].ToString()))
{
MessageBox.Show("Logged In");
}
}
}
}
}
Attachment:
project.rar
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