when i run my code the labels stay the same but when i debug it i can see the text changes and then changes back when it is done runnning
public void getData(string a)
{
SqlConnection conn = new SqlConnection(#"Data Source=MASSI\FABERSERVER;Initial Catalog=Data.mdf;Integrated Security=True");
conn.Open();
SqlCommand command = new SqlCommand("Select UserID,UserName,Email FROM Login Where UserName= '" + a + "'", conn);
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
label1.Text = reader["UserID"].ToString();
label2.Text = reader["UserName"].ToString();
label3.Text = reader["Email"].ToString();
}
conn.Close();
}
Just in case, try this:
public void getData(string a) {
SqlConnection conn = new SqlConnection(#"Data Source=MASSI\FABERSERVER;Initial Catalog=Data.mdf;Integrated Security=True");
conn.Open();
SqlCommand command = new SqlCommand("Select UserID,UserName,Email FROM Login Where UserName= '" + a + "'", conn);
SqlDataReader reader = command.ExecuteReader();
string id, name, email;
while (reader.Read())
{
id = reader["UserID"].ToString();
name = reader["UserName"].ToString();
email = reader["Email"].ToString();
}
conn.Close();
label1.Text = id;
label2.Text = name;
label3.Text = email;
}
}
Hope, it helps.
Related
I am creating one application my requirement is what when column name Status is N in Registration table, then current form should hide and Login form should be open.
If Status is not N then its should be open Registration_Form. I'm trying but it's causing
Error creating window handle
on the rf.Show() call.
on insert button code
string status = "Y";
//Random random = new Random();
//int randomNumber = random.Next(0, 100);
string random1 = System.Web.Security.Membership.GeneratePassword(10, 0);
string concate = textBox1.Text + "-" + textBox2.Text + "-" + textBox3.Text.Substring(textBox3.Text.Length - 4) + "-" + random1;
string connectionString = null;
connectionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;
con.ConnectionString = connectionString;
string SqlString = "Insert Into Registration (Name,Last_Name,Contact_No,Address,Insert_Date,Registration_key,Status) Values (?,?,?,?,?,?,?)";
//using (OleDbCommand cmd = new OleDbCommand(SqlString, con))
//{
OleDbCommand cmd = new OleDbCommand(SqlString, con);
con.Open();
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#Name", textBox1.Text);
cmd.Parameters.AddWithValue("#Last_Name", textBox2.Text);
cmd.Parameters.AddWithValue("#Contact_No", textBox3.Text);
cmd.Parameters.AddWithValue("#Address", textBox4.Text);
cmd.Parameters.AddWithValue("#Insert_Date", textBox5.Text);
cmd.Parameters.AddWithValue("#Registration_key", concate);
cmd.Parameters.AddWithValue("#Status", status);
//}
int n = cmd.ExecuteNonQuery();
con.Close();
if (n > 0)
{
MessageBox.Show("Data Inserted Successfully,NOW PLEASE ACTIVATE APPLICATION PUTTING ACTIVATE KEY ", "Data Inserted ", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
on update button code --
string Status = "N";
string connectionString = null;
connectionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;
con.ConnectionString = connectionString;
string recover = "SELECT Registration_key from Registration where Registration_key='" + textBox6.Text + "'";
OleDbCommand cmd = new OleDbCommand(recover, con);
con.Open();
OleDbDataReader reader = cmd.ExecuteReader();
if (reader.Read())
{
textBox6.Text = reader["Registration_key"].ToString();
if (con.State == ConnectionState.Open)
{
con.Close();
}
string cmd1 = "update Registration set Status=#Status where Registration_key=#Registration_key";
cmd = new OleDbCommand(cmd1, con);
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#Status", Status);
cmd.Parameters.AddWithValue("#Registration_key", textBox6.Text);
con.Open();
int n2 = cmd.ExecuteNonQuery();
con.Close();
this.Hide();
Login_Page lp = new Login_Page();
lp.Show();
}
else
{
MessageBox.Show("Invalid Activated Key", "Invalid", MessageBoxButtons.OK, MessageBoxIcon.Stop);
}
con.Close();
on load event--
string connectionString = null;
connectionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;
con.ConnectionString = connectionString;
string Comparing="N";
string query = "select Status from Registration where Status='N'";
con.Open();
OleDbCommand cmd = new OleDbCommand(query, con);
string compare = Convert.ToString(cmd.ExecuteScalar());
con.Close();
if (compare == Comparing)
{
this.Hide();
Login_Page lp = new Login_Page();
lp.Show();
}
else if (compare != Comparing)
{
Registration_Form rf = new Registration_Form();
rf.Show();
}
i got a solution i remove e
lse if (compare != Comparing)
{
Registration_Form rf = new Registration_Form();
rf.Show();
}
this and instead that normal use else condition
connectionString = ConfigurationManager.ConnectionStrings["AccessConnectionString"].ConnectionString;
con.ConnectionString = connectionString;
string Comparing="N";
string query = "select Status from Registration where Status='N'";
con.Open();
OleDbCommand cmd = new OleDbCommand(query, con);
string compare = Convert.ToString(cmd.ExecuteScalar());
con.Close();
if (compare == Comparing)
{
this.Hide();
Login_Page lp = new Login_Page();
lp.Show();
}
else
{
MessageBox.Show("Pls Register yourself");
}
this code giving me what requirement i want
public int getcid(string UserName)
{
SqlConnection con = new SqlConnection(strConnString);
con.Open();
int js;
string query = "select Username from register_tab where Email='" + UserName + "' ";
sqlda = new SqlDataAdapter(query, con);
DataSet ds = new DataSet();
sqlda.Fill(ds);
js = Convert.ToInt32(ds.Tables[0].Rows[0]["Username"].ToString());
return (js);
Change your method to this and check it out:
SqlConnection con = new SqlConnection(strConnString);
con.Open();
string js;
string query= "select Username from register_tab where Email= #username";
SqlCommand cmd = new SqlCommand(query, con);
cmd.Parameters.Add("#username",SqlDbType.VarChar, 50).Value =
UserName;
using(SqlDataReader reader= cmd.ExecuteReader())
{
while (reader.Read())
{
js= reader["Username"].ToString();
}
}
con.Close();
return js;
Also why do you set your UserName to Email Column in your query?
And why do you use DataSet if you only want to return int?
UPDATE: no need to convert to int.
I am trying to make a log in page in C# web page. I have written that code which I think is correct. The user supposed to key in the correct username and password. Before I go any further into modifying after success log in I temporarily set the label 1 to show me whether it's correct or not. However it doesn't work and every time I tried to key in the correct data, it always show "failed".
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = ("Data Source=localhost;Initial Catalog=SeminarDB; Integrated security=true;");
try
{
con.Open();
string str = "select * from Member where Username='" + signintext.Text + "' and Password='" + passwordtext.Text + "'";
SqlCommand cmd = new SqlCommand(str, con);
SqlDataReader dr = cmd.ExecuteReader();
string login = signintext.Text;
string pwd = passwordtext.Text;
while (dr.Read())
{
if ((dr["Username"].ToString() == login) && (dr["Password"].ToString() == pwd))
{
Label1.Text = "success!";
visibl = true;
}
else
{
Label1.Text = "failed!";
}
}
dr.Close();
con.Close();
}
catch (Exception ex)
{
Label1.Text = ex.Message;
}
}
Try this, hope it works
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = ("Data Source=localhost;Initial Catalog=SeminarDB; Integrated security=true;");
try
{
con.Open();
string str = "select * from Member where Username='" + signintext.Text + "' and Password='" + passwordtext.Text + "'";
SqlCommand cmd = new SqlCommand(str, con);
SqlDataReader dr = cmd.ExecuteReader();
if(dr.Read())
{
Label1.Text = "success!";
visibl = true;
}
else
{
Label1.Text = "failed!";
}
con.Close();
}
catch (Exception ex)
{
Label1.Text = ex.Message;
}
}
Try this simple method..
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
SqlConnection con = new SqlConnection();
con.ConnectionString = ("Data Source=localhost;Initial Catalog=SeminarDB; Integrated security=true;");
try
{
con.Open();
string str = "select count(*) from Member where Username='" + signintext.Text + "' and Password='" + passwordtext.Text + "'";
SqlCommand cmd = new SqlCommand(str, con);
SqlDataReader dr = cmd.ExecuteReader();
string login = signintext.Text;
string pwd = passwordtext.Text;
while (dr.Read())
{
if ((dr[0] > 0)
{
Label1.Text = "success!";
}
else
{
Label1.Text = "failed!";
}
}
dr.Close();
con.Close();
}
catch (Exception ex)
{
Label1.Text = ex.Message;
}
}
Can anybody tell me why my database isn't updating? Here's my code:
protected void editSection_selected(object sender, EventArgs e) {
int index = grdPhone.SelectedIndex;
GridViewRow row = grdPhone.Rows[index+1];
string values = ((DropDownList)sender).SelectedValue;
int tempVal = Convert.ToInt32(values);
int caseage = Convert.ToInt32(keyId);
int value = tempVal;
/*OleDbConnection con = new OleDbConnection(strConnstring);
//string query = "Update Categories set HRS_LEVEL_AMOUNT=" + tempVal + " where parent_id=65 and ID=" + caseage;
string query = "Delete HRS_LEVEL_AMOUNT from Categories where parent_id=65 and id=" + caseage;
OleDbCommand cmd = new OleDbCommand(query, con);
con.Open();
cmd.ExecuteNonQuery();
con.Dispose();
cmd.Dispose();
con.Close();
accPhoneNumbers.UpdateCommand = "Update Categories set HRS_LEVEL_AMOUNT=" + tempVal + " where parent_id=65 and ID=" + caseage;
*/
string str = "UPDATE Categories SET HRS_LEVEL_AMOUNT = ? WHERE ID=?";
using (OleDbConnection con = new OleDbConnection(strConnstring))
{
using (OleDbCommand cmd = new OleDbCommand(str, con))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("HRS_LEVEL_AMOUNT", tempVal);
cmd.Parameters.AddWithValue("ID", caseage);
con.Open();
cmd.ExecuteNonQuery();
}
}
Label1.Text += " editSection Success! (B) " + tempVal;
}
The commented part is my first solution (including the accPhoneNumbers.UpdateCommand).
I really need your help guys.
I hope this can help you:
string str = "UPDATE Categories SET HRS_LEVEL_AMOUNT = #value1 WHERE ID=#value2";
using (OleDbConnection con = new OleDbConnection(strConnstring))
{
using (OleDbCommand cmd = new OleDbCommand(str, con))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("#value1", tempVal);
cmd.Parameters.AddWithValue("#value2", caseage);
con.Open();
cmd.ExecuteNonQuery();
con.close();
}
}
For more information you can visit this video
I need to be able to verify a username and password against a sql server and I need code for a C# forms application.
I have it setup with 2 textboxes (1 user and 1 pass) and then I have a login button.
SqlConnection UGIcon = new SqlConnection();
UGIcon.ConnectionString = "Data Source=HP-PC//localhost;Initial Catalog=UGI;Integrated Security=True";
UGIcon.Open();
string userText = textBox11.Text;
string passText = textBox12.Text;
SqlCommand cmd = new SqlCommand("SELECT stUsername,stPassword FROM LoginDetails WHERE stUsername='" + textBox11.Text + "' and stPassword='" + textBox12.Text + "'", UGIcon);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataTable dt = new DataTable();
da.Fill(dt);
if ( dt.Rows.Count > 0)
{
MessageBox.Show("Login Success!!");
cmd = new SqlCommand("SELECT stRole from LoginDetails where stUsername=#stUsername", UGIcon);
cmd.Parameters.AddWithValue("#stUsername",userText);
string role = cmd.ExecuteScalar().ToString();
MessageBox.Show(role);
UGIcon.Close();
}
else
{
MessageBox.Show("Access Denied!!");
UGIcon.Close();
}
I'm a real believer in using the "using" statements. You can also save yourself a 2nd query by asking for the stRole variable in the original query. The using blocks will automatically dispose of the objects, so when execution leaves this area, the objects will automatically be cleaned up.
using (SqlConnection UGIcon = new SqlConnection("Data Source=localhost\\sqlexpress;Initial Catalog=UGI;Integrated Security=True"))
{
UGIcon.Open();
string userText = textBox11.Text;
string passText = textBox12.Text;
SqlCommand cmd = new SqlCommand("SELECT stUsername,stPassword, stRole FROM LoginDetails WHERE stUsername='" + userText + "' and stPassword='" + passText + "'", UGIcon);
using (SqlDataReader rdr = cmd.ExecuteReader())
{
if (rdr.HasRows)
{
while (rdr.Read())
{
string role = rdr["stRole"].ToString();
MessageBox.Show(role);
}
}
else
{
MessageBox.Show("Access Denied!!");
}
}
}
Pls check this code
SqlConnection thisConnection = new
SqlConnection(#"Server=(local)\sqlexpress;Integrated Security=True;" +
"Database=northwind");
thisConnection.Open();
SqlCommand thisCommand = thisConnection.CreateCommand();
thisCommand.CommandText = "Select count(*) from UserDetails
WHere UserName = "+txtUsername.text.trim().toLower() + " and Password = " +txtPassword.text.trim().toLower();
Object countResult = thisCommand.ExecuteScalar();
Console.WriteLine("Count of Customers = {0}", countResult);
thisConnection.Close();